OEMDirtBikeParts Reviews - Tips & tricks on FCR carb tuning the Needle & Air Screw
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- Опубліковано 23 лют 2020
- Easy ways to fix carb problems & tune for better performance.
Fine tunning Keihin and Mukuni Carburetors.
-FCR Fuel Air Screw Adjustments
-Keihin Needle Positioning
Rebuild service
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Super great explanation. Love hearing great machines.
Great Video, what I need and nothing more. Thanks!
Thanks, this was a very helpful video :-)
Love to see you do a video on an Xr650r build 🤘
The fact your exhaust is coloured like is a good indication the tune is correct ✅
Good vid, thanks!
Do you guys set proper jets for different altitudes i'm in the mountains of TN and had a stock carb with jd i put in but really lookin to upgrade to a big daddy carb from you guys thinkin about the full exhaust also. Thanks
Hi Bro!, Again it's me with my NC250 chinese engine, 4 Valves, water cooled, comprenssion ratio: 11.5:1, bore/stroke: 77mm/56.3mm, Max power: 26hp / 9000rpm. I'm using a FCR37 (Is that ok? Or may be it's too big) Pilot jet: #40 and Main jet: #138. and 3/4 quarter fuel air screw out. It bogs when acelerate and hardly mid-range throttle response. My question Is... Is that the correct carburetor FCR37 i'm using?, if not would be a FCR33 be fine?, What else can change to get the correct tuning? Thank u in advance, regards
my bike will bog out and cut off when i punch the throttle. and when i give it high revs it will cut off when it comes back too idle. i thought the bog was my accelerator pump timing or the diaphragm being worn out and i put a accelerator pump rebuilt kit and timed it right. it still bogs. u have any ideas on what i should do with the jetting/ needle.
I set my air fuel like you explained. But when i give it alot of throttle from idle it lean bogs. Does that mean i would need to raise the needle some?(move clip down) To give it more fuel right of idle?
Gday.
CR 41mm FCR - V twin 950 Super enduro
So I got a fcr39 finally,and I'm new to the tuning why does the idle speed up when I screw it in. Backwards of the cv I'm used to. Screw it in the idle drops. Running a 165 main 48 pilot apparently a emp needle haven't touched air jets and have no clue what they are. At two turns out on my first ride decel had no pops it was smooth but start up wasn't as instant as I like.. Take it back to 1 and a half turn as soon as button gets touch she is alive even at 35 degrees with the choke of course very strong all the way thru the rpm revs great power ups 1st thru third no problem pulls hard to ten grand. It's a 434 stage 1 hc powerbomb header 3x3.5 all the right adapters to mount it. No coast enrichment.
Good ole San Clemente 😁
I could really use some advice! I have a FCRMX39 and this thing bogs and dies if i snap the throttle. I cannot seem to fix it!
Hello, which fuel petcock
what size is your rear sprocket?
What size main jet are you running
What kinda exhaust is that?
Interesting! I just scooped a used 2001 drz400e off a buddy a few weeks ago. Didn’t realize I might have been looking at Mikuni specs on that mix screw. I got a stock 45 pilot and it idles great at about 1680-1750 currently but you blip the throttle and it’ll surge and rpms hover around 2900 for a few minutes on its own and the eventual drop back down to idle. 🥲🤣