For that way over tight screw…. Use a Dremel with a flat cutting dish and cut a straight line so a standard screwdriver can be used. It’s way easier than fighting with vice grips.
I have a polaris sportsman 500. The polaris runs half throttle but bogs down at full throttle it has new fuel lines, oil change, oil filter, new carburetor, new battery new coil and wire, new spark plug and new fuel pump. What could be causing it to big down at full throttle
Cool video bro. I just rejetted my yamaha big bear 350 and found my Main jets and Pilots jets at "Jets R Us". They had a larger selection compared to the other ATV parts stores i visited online. I like to order several so i can dial in the carb just right. I had to rejet after I installed snorkel intake and added a DG slip on exhaust. Quad sounds killer now, but won't stay at idle. It will idle when I first start quad, but will eventually slow the rpms lower and lower and then stop running. 1/4 to WOT it runs great. I guess I still need to rejet my Pilot Jet for idle, right? I also have a 500 polaris sportsman which I installed a snorkel for airbox and cvt and surprisingly didn't have to rejet,
Thanks I really needed to see this video I have a 2010 polaris sportsman 500 H.O. that I have been having problems with it running lean and acting like it runs out of fuel or just shutting down every now and again changed the fuel pump 2x,carburetor 2x,rebuilt the orginal carb with oem parts and still had the same problem before finally reading that if the air filter has been changed to aftermarket that it needs ti be rejetted,the bike only has 1200 mikes on it and in really good condition and I have been wanting to ride it for months now but couldn't figure out why it was running like it was .Anyways tomorrow my new jet kit will be in and I am going to tear into it once again also I have found the cover over the screw and plan to remove it and clean and reajust it to the 2 turns like you suggested see how it runs after all this hopefully it will be the last time I have to work on it for awhile. Thanks for the video and it will come in handy for the work I have to do and I look forward to watching more of your videos in the future.
I had the problem with Shutting down when my 2011 was new , Found out that when Turning the KEYCHAIN the dealer installed on the key was just getting Caught LOL! and would turn it off. Jetting being off just a little should never cause her to just "die" I would also recommend make sure the Tank vent lines are not pinched off. Or just open your fuel cap when driving to see if you hear pressure or Suction.
I got a 2012 polaris sportsman 500 I need to rejet I ride about 8700 feet of elevation and I don't know what size of jets to get it has an exhaust modification and intake thank you for your help
That's hose on the bottom of the carb is essential if you ride in water. It has a one way valve inline so water doesn't get inside your carb fuel bowl.
Hi I have a 2005 Yamaha raptor 660r an I'm on 2,860 elevation. As you should know I have two carbs how many turns should I give the pilot screw.!!!! Thanks
Might be too old of a video to comment on but does re-jetting and Bolton parts really make that big of an improvement if the bikes run good? How powerful is this once the work is done compared to the new 570 that’s out?
Thanks for posting this. Went to take my 500 HO out only to realize that gas was shooting out of the air filter. Had the same problem with that same screw and the only thing that could get it off was vice grips.
Oh yeah the PMS or Idle Air screw seemed like it was fully bottomed out or turned all the way in. I tried to tighten it up to check how many turns out it was set from the factory but it didnt want to go any further in. There was a good amount of the needles tip sticking out into the throttles bore. I have to look at my FSM to check how many turns out it should've been from the factory then adjust it from there to hit a sweet spot. I think the hard starting was caused by the PMS not being turned out at all. Weird, I would think from how much this pigs vibrate the PMS would want to unscrew not tighten. Lol. I ordered a PMS screw for my Arctic Cat from a Harley Davidson carb parts website a few days ago. It's threaded longer then the stock screw because it has a knob on the end for very easy adjustments. So instead of having to loosen the carbs clamps enough so you can tilt it to make adjustments. This way you can leave the carb all nice and tight then just turn the knob to make changes. Gonna look and see if one is available for the Mikuni carbs. Sorry for going on. Lol. Good video Btw.
I have a polaris magnum 425 '97 with really similar if not the same carburetor, I lost the ring which sits under the C clip, can you tell me the dimensions of the ring? the thickness and diameter? (mostly interested in knowing the thickness)
I realize this video is 4 yrs old but I'm at 8400 ft in Colorado, 5 months a yr. I put a new carb on my polaris 500 but it wouldn't work properly, then I saw you adjust for altitude. I did the same, worked like a charm. Thank you.
soooo im not too big into my diy fixing my own 4 wheeler so i dont know too much, but i have my carburetor set for high altitudes and i want to set it for regular altitudes now is this the same as you doing in the video.
I just removed the carb off my dad's 2012 Sportsman 500 HO for a good cleaning plus I'm trying to fix his hard starting issue when it's cold. Not cold as in the weather but when it sits overnight or roughly 8-10 hours. Well inside the throttle plate area it was bone dry, no dirt or grime what so ever. His machine has around 3,500 miles and the trails we ride can go from really dusty if it doesn't rain to really muddy with deep water crossings if it does rain. Lots of fun either way. He really never rides in the front of the pack so he gets the brunt of the dust. So that being said I think you probably should've replaced that oring for the throttle plate cover. Don't want to get that so full of crap it rusts it shut or enough to where your throttle cable snaps. I recall you stating your throttle cable started to feel a little tight which means it's getting enough crap inside there to cause a issue. I haven't played with a newer Mikuni carbs, mostly Keihin carbs but man are these carbs cheaply made. It's like nothing but plastic inside them. The slide, where the slide rides in the carb and even the main needle. WTF??? Seeing the parts inside I'm not to feeling these carbs. The Keihin on my Arctic Cat has no plastic and the original needle was aluminum but my DynoJet kit came with a titanium to lighten it up even more then it was. I can see over time the plastic parts inside the Mikuni breaking down and disintegrating. Wonder if any companies make metal replacement parts. I think the DynoJet kits for the Sportsman come with a titanium needle. I'll maybe talk him into a jet kit to get rid of the factory plastic needle.
Ok, iM pretty sire this video helped because my polaris was having really cold starts and bad idles untils its warm, so when I adjusted the screw under the plug I got mini backfires, and then after a while they were going away, is this normal? Think the motor just needs to get used to it.
i have a 2005 polaris 500 ho had carb off to install new o ring and put back together and not getting gas to bowl i have gas when i pull line off.and it was running great befoe i started any help would be great thanks john
Alright my bad i didnt watch the whole thing i thought the screws were fine and you just used vice grips, i didnt realized they were factory tight as shit. id probably go the same route if those screws were stripped.
Stock Polaris. I did find a Snap-On timing gun with digital tach so I can check my idle. I will do a full throttle shut off run tonight and replace the plug but I know it is rich.
When those screws are tight like that sometimes the easiest way is to use a small sharp flat chisel on the edge and carefully tap it Loose with a hammer once the screw is out you can put it in a vise and hacksaw a flat in it or use a cutting wheel and cut a flat Groove across it so you can reinstall it with a flat blade screwdriver just throwing out my 50 years experience for people I don't even know why I was watching this video I was just bored for the moment I guess I was actually looking for a carb
I have a 1998 Polaris Sportsman 500 runs good Lo end and idols good but on top in it starts cutting out not sure which screw to adjust wondering if you might could help
Hey man i have a 2012 YFZ 450 with a big gun exhaust and i am having some back fire issues also at night time my pipe turns red at the head of the pipe. I haven't cleaned my carbs since I bought the bike i think they are dirty i was also told that i may be running to lean what do i need to adjust ? Just kinda scared to mess with the carbs I don't want to mess anything up
what size is the drain screw for the carb on a 2012 sportsman ,I put bad gas in it and it stalled and wouldn't start iv pulled the bad gas out with a syphon and put new in also put in a new plug still wont start I think I need to drain the carb .
Damn this is by far the best tutorial video on this subject.. finally, a man with balls to be a man in a garage that swears drinks beer and pisses!! You made it was so easy to understand!! Thank you so much! Fuckin men !!! You're the man!
@@starpuss I have the same quad.. just had to see how it was done.. after I watched we out ripped her apart and cleaned,reassembled and running in an hour and a half! Fucking runnin like a raped ape now!! Thank you!
Hey, I own a 2008 sportsman 500 HO any chance you can do a video on the idle adjustment screw for the carb. The manual says where it is but I'll be damned it I can find it. It has to be somewhere. Thanks!
your atv is fuel injected it doesn't have a carb its got a thorttle body you might be able to adjust the idle on the throttle cable. one adjuster will be at the top of handle bar near thumb throttle and another will be half way down cable.
Ok .I have a 2012 500 ho that I've done the same as your video . Same jets and did the needle adjustment. I however stripped the air fuel mix screw and it runs really rich and rough when in low. I have also done the exhaust mod as well. Just wondering if you had to put the needle back to stock position. Or if that will help my case as there is no way I can adjust my mixture. My plugs foul if I'm just putting around or bush banging. Your feed back would be greatly appreciated
My 2010 500 HO did the same thing this winter, spoke with the shop and they said it was most likely the float valve sticking open, a little tap with something usually corrects it.
I have done all mods you have shown. Air box, exhaust and jets exactly as you did. Machine starts, runs and sounds awesome. My questions. 1. How rich is to too rich? It will not start on its own. Just a slight bump of throttle. My elevation is just over 1000ft so 2 full turns on idle air. 2. How can I set idle with no tach? Maybe by just listening? Thx
For that way over tight screw…. Use a Dremel with a flat cutting dish and cut a straight line so a standard screwdriver can be used. It’s way easier than fighting with vice grips.
An impact driver is very helpful for super tight screws.
I have a polaris sportsman 500. The polaris runs half throttle but bogs down at full throttle it has new fuel lines, oil change, oil filter, new carburetor, new battery new coil and wire, new spark plug and new fuel pump. What could be causing it to big down at full throttle
Cool video bro. I just rejetted my yamaha big bear 350 and found my Main jets and Pilots jets at "Jets R Us". They had a larger selection compared to the other ATV parts stores i visited online. I like to order several so i can dial in the carb just right. I had to rejet after I installed snorkel intake and added a DG slip on exhaust. Quad sounds killer now, but won't stay at idle. It will idle when I first start quad, but will eventually slow the rpms lower and lower and then stop running. 1/4 to WOT it runs great. I guess I still need to rejet my Pilot Jet for idle, right? I also have a 500 polaris sportsman which I installed a snorkel for airbox and cvt and surprisingly didn't have to rejet,
Nice video! Use a cordless drill for those screws on the bottom. Works like a charm. Even a light duty cordless impact.
manual impact driver for getting those bolts out. Makes quick work and doesn't screw the screws...;)
Very good dude! Helped me a lot. Only thing I could add is cleaning the tube that goes horizontally. You can easily pull it out and clean.
Thanks I really needed to see this video I have a 2010 polaris sportsman 500 H.O. that I have been having problems with it running lean and acting like it runs out of fuel or just shutting down every now and again changed the fuel pump 2x,carburetor 2x,rebuilt the orginal carb with oem parts and still had the same problem before finally reading that if the air filter has been changed to aftermarket that it needs ti be rejetted,the bike only has 1200 mikes on it and in really good condition and I have been wanting to ride it for months now but couldn't figure out why it was running like it was .Anyways tomorrow my new jet kit will be in and I am going to tear into it once again also I have found the cover over the screw and plan to remove it and clean and reajust it to the 2 turns like you suggested see how it runs after all this hopefully it will be the last time I have to work on it for awhile. Thanks for the video and it will come in handy for the work I have to do and I look forward to watching more of your videos in the future.
I had the problem with Shutting down when my 2011 was new , Found out that when Turning the KEYCHAIN the dealer installed on the key was just getting Caught LOL! and would turn it off.
Jetting being off just a little should never cause her to just "die" I would also recommend make sure the Tank vent lines are not pinched off. Or just open your fuel cap when driving to see if you hear pressure or Suction.
45 AND 160. Stock was 40 and 152.5 Year is 2002. I am thinking of turning idle air in 1 full and back out 1/4. Thoughts?
you can tell me the main things to enhance the carburetor not understand the videos because I do not speak English
Some good information but good grief man! Stop rambling and saying "basically"! Also get a freaking tripod and stop hand filming!
I agree 100% with you LOL!
we had the same problems with striped screws on both ends, so frustrating, !!!!!!!
I got a 2012 polaris sportsman 500 I need to rejet I ride about 8700 feet of elevation and I don't know what size of jets to get it has an exhaust modification and intake thank you for your help
That's hose on the bottom of the carb is essential if you ride in water. It has a one way valve inline so water doesn't get inside your carb fuel bowl.
30spooln where does that Jose connect to or does it go just from the carb? I found that line leaking and ripped out with fuel
Hi I have a 2005 Yamaha raptor 660r an I'm on 2,860 elevation. As you should know I have two carbs how many turns should I give the pilot screw.!!!! Thanks
Might be too old of a video to comment on but does re-jetting and Bolton parts really make that big of an improvement if the bikes run good? How powerful is this once the work is done compared to the new 570 that’s out?
So did you use the factory needle? My kit came with a new needle that is a tad fatter..
Thanks for posting this. Went to take my 500 HO out only to realize that gas was shooting out of the air filter. Had the same problem with that same screw and the only thing that could get it off was vice grips.
Oh yeah the PMS or Idle Air screw seemed like it was fully bottomed out or turned all the way in. I tried to tighten it up to check how many turns out it was set from the factory but it didnt want to go any further in. There was a good amount of the needles tip sticking out into the throttles bore. I have to look at my FSM to check how many turns out it should've been from the factory then adjust it from there to hit a sweet spot. I think the hard starting was caused by the PMS not being turned out at all. Weird, I would think from how much this pigs vibrate the PMS would want to unscrew not tighten. Lol.
I ordered a PMS screw for my Arctic Cat from a Harley Davidson carb parts website a few days ago. It's threaded longer then the stock screw because it has a knob on the end for very easy adjustments. So instead of having to loosen the carbs clamps enough so you can tilt it to make adjustments. This way you can leave the carb all nice and tight then just turn the knob to make changes. Gonna look and see if one is available for the Mikuni carbs. Sorry for going on. Lol. Good video Btw.
I have a polaris magnum 425 '97 with really similar if not the same carburetor, I lost the ring which sits under the C clip, can you tell me the dimensions of the ring? the thickness and diameter? (mostly interested in knowing the thickness)
elevation or attitude of Winnipeg Manitoba Canada is 239 m or 761ft above sea level
I realize this video is 4 yrs old but I'm at 8400 ft in Colorado, 5 months a yr. I put a new carb on my polaris 500 but it wouldn't work properly, then I saw you adjust for altitude. I did the same, worked like a charm. Thank you.
soooo im not too big into my diy fixing my own 4 wheeler so i dont know too much, but i have my carburetor set for high altitudes and i want to set it for regular altitudes now is this the same as you doing in the video.
I just removed the carb off my dad's 2012 Sportsman 500 HO for a good cleaning plus I'm trying to fix his hard starting issue when it's cold. Not cold as in the weather but when it sits overnight or roughly 8-10 hours. Well inside the throttle plate area it was bone dry, no dirt or grime what so ever. His machine has around 3,500 miles and the trails we ride can go from really dusty if it doesn't rain to really muddy with deep water crossings if it does rain. Lots of fun either way. He really never rides in the front of the pack so he gets the brunt of the dust.
So that being said I think you probably should've replaced that oring for the throttle plate cover. Don't want to get that so full of crap it rusts it shut or enough to where your throttle cable snaps. I recall you stating your throttle cable started to feel a little tight which means it's getting enough crap inside there to cause a issue.
I haven't played with a newer Mikuni carbs, mostly Keihin carbs but man are these carbs cheaply made. It's like nothing but plastic inside them. The slide, where the slide rides in the carb and even the main needle. WTF??? Seeing the parts inside I'm not to feeling these carbs. The Keihin on my Arctic Cat has no plastic and the original needle was aluminum but my DynoJet kit came with a titanium to lighten it up even more then it was. I can see over time the plastic parts inside the Mikuni breaking down and disintegrating. Wonder if any companies make metal replacement parts. I think the DynoJet kits for the Sportsman come with a titanium needle. I'll maybe talk him into a jet kit to get rid of the factory plastic needle.
Ok, iM pretty sire this video helped because my polaris was having really cold starts and bad idles untils its warm, so when I adjusted the screw under the plug I got mini backfires, and then after a while they were going away, is this normal? Think the motor just needs to get used to it.
Winnipeg !!! Fuck ya!
i have a 2005 polaris 500 ho had carb off to install new o ring and put back together and not getting gas to bowl i have gas when i pull line off.and it was running great befoe i started any help would be great
thanks
john
vry useful dunked mine and went over it a couple times sorted several issues. runs great. thanks.
Does the needle on the float really just loop over the thin metal piece? Mine fell off during disassembly and I want to get it back in correctly
Alright my bad i didnt watch the whole thing i thought the screws were fine and you just used vice grips, i didnt realized they were factory tight as shit. id probably go the same route if those screws were stripped.
i would use silicone to hold the cap back in place glue not a good plan lol
Stock Polaris. I did find a Snap-On timing gun with digital tach so I can check my idle. I will do a full throttle shut off run tonight and replace the plug but I know it is rich.
I had same damn problem getting bowl screw off impact screw driver works great . what did u get out of rejetting anymore hp??
When those screws are tight like that sometimes the easiest way is to use a small sharp flat chisel on the edge and carefully tap it Loose with a hammer once the screw is out you can put it in a vise and hacksaw a flat in it or use a cutting wheel and cut a flat Groove across it so you can reinstall it with a flat blade screwdriver just throwing out my 50 years experience for people I don't even know why I was watching this video I was just bored for the moment I guess I was actually looking for a carb
So 2002 Sportsman 400, assuming I do the exhaust and air box mod, at 200 ft elevation what main and jet would you recommend?
Also, my screws on the bowl were just as tight. Stems Polaris hasn't heard of never sieze!
Yeah those screws are super super tight but I used a impact drill and it came right out! Impact drills are amazing 😉
I have a 1998 Polaris Sportsman 500 runs good Lo end and idols good but on top in it starts cutting out not sure which screw to adjust wondering if you might could help
is the carb on the outlaw 525 it's 2008 the same as this carb?
Hey man i have a 2012 YFZ 450 with a big gun exhaust and i am having some back fire issues also at night time my pipe turns red at the head of the pipe. I haven't cleaned my carbs since I bought the bike i think they are dirty i was also told that i may be running to lean what do i need to adjust ? Just kinda scared to mess with the carbs I don't want to mess anything up
Rashad Dorsey to lean man. Your gunna fire it. Is the pipe like lava red hot? Not good.
Hello just wondering if the weights on the clutch would effect idle?
same screw on my 500 striped, i dremmed a slot into it.
what main did you use 157.5 or 160
depends on the year of machine
if you have a tach or not any with a digital gauge have a tach
Great video dude. I like all the details you put into it. I've never worked on ATVs but I'm gonna work on mine. Keep up the good work. Tks.
Looking for an ATV. Should I just buy one with EFI?
EFI is Great ,And the Polaris system seems to be great.
During the winter i wish more and more i had EFI on my quads
what size is the drain screw for the carb on a 2012 sportsman ,I put bad gas in it and it stalled and wouldn't start iv pulled the bad gas out with a syphon and put new in also put in a new plug still wont start I think I need to drain the carb .
+Damion Murphy was 3\16 alan key to drain the carb
question. working 2004 Polaris sportsman 500. has fire and is getting fuel to the cylinder and it still doesn't want to even try and start.
That's not a question.
I had a 94 big bear and actually had to drill out my idle screw
Damn this is by far the best tutorial video on this subject.. finally, a man with balls to be a man in a garage that swears drinks beer and pisses!! You made it was so easy to understand!! Thank you so much! Fuckin men !!! You're the man!
Thanks For Watching , With this Jet the Quad Is Still Running good.
I put on 5000Miles and Close to 400 Hours Since this video.
@@starpuss I have the same quad.. just had to see how it was done.. after I watched we out ripped her apart and cleaned,reassembled and running in an hour and a half! Fucking runnin like a raped ape now!! Thank you!
IT was a brass plug, sharp or not it would have drilled it that easy :P Great vid.
I LOVE U SOOOOO MUCH I HAVE BEEN LOOKING FOR A VID LIKE THIS FOR EVER. ThAnKyOu. LIKED AND SUBBED,
i replaced the bowl screws with socket cap screws
Hey, I own a 2008 sportsman 500 HO any chance you can do a video on the idle adjustment screw for the carb. The manual says where it is but I'll be damned it I can find it. It has to be somewhere.
Thanks!
your atv is fuel injected it doesn't have a carb its got a thorttle body you might be able to adjust the idle on the throttle cable. one adjuster will be at the top of handle bar near thumb throttle and another will be half way down cable.
+Thibault Uhh wrong, the 500 HOis carbed
Ok .I have a 2012 500 ho that I've done the same as your video . Same jets and did the needle adjustment. I however stripped the air fuel mix screw and it runs really rich and rough when in low. I have also done the exhaust mod as well. Just wondering if you had to put the needle back to stock position. Or if that will help my case as there is no way I can adjust my mixture. My plugs foul if I'm just putting around or bush banging. Your feed back would be greatly appreciated
Mine is still the same as this video , I put 1500 miles on it and she is still running nice.
I was thinking of getting the needle back to stock so it leans it out a bit. What do you think
good interesting video
Sounds rich huh. Lol.
thx that help a lots
dude...meth
i have 2012 500 ho it sit for 3mouth in the cold it runs good but it is leaking gas out of that drain tube not a lot but leaking
Mine did that for a little bit , All I did was gave it a good ride and it was fine.
My 2010 500 HO did the same thing this winter, spoke with the shop and they said it was most likely the float valve sticking open, a little tap with something usually corrects it.
Star, how did the 45 pilot, and 1 slot lower in the needle work for it? Did you have to make adjustments again? Great vid btw.
Working great!!!
quad now has close to 10,000 miles on her.
Ok awesome! Thanks for the info. I have to build mine figured I'd ask.
great info
Great vid thanks !!
I have done all mods you have shown. Air box, exhaust and jets exactly as you did. Machine starts, runs and sounds awesome. My questions. 1. How rich is to too rich? It will not start on its own. Just a slight bump of throttle. My elevation is just over 1000ft so 2 full turns on idle air. 2. How can I set idle with no tach? Maybe by just listening?
Thx
And I seem to be getting plenty of gas
Why so much profanity?