I read this about the ignition (MVT) that you use on your Malossi engine. and thought you might want to see it... if you want a link to the place, just say (-: MVT DD ignition timing for 50cc stroke engines should be 0.40 before TDC, while for any other stroke and long stroke the timing should be between 0.30 and 0.35 max. Failure to comply with this condition may result in an abnormally high temperature in the stator, which may cause irreversible damage.
@@bp-tuningaeroxlc-dd6474 If the stator is overheating though, it shouldn't know what size the engine is. It basically just spins and processes signals, so I'm assuming it's an electronics based issue that maybe too much advance or delay causes. The only way I'd think engine size would have any bearing there would be possibly related to dwell related to stroke and conrod length, but it seems like it should be so marginal.
@@49ccscoot yes exactly. the stroke length. MVT ignition should according to what I read, then the MVT ignition that you use should not be suitable for Engine with Rod85 cranks or longer stroke.. or is it not recommended? you use MVT Ignition on engine over 70cc. I have read that about the MVT ignition
Pretty cool 👍 I don't have a scooter but do have a 2 stroke motorized bicycle.....Gonna put a 4.5hp 2 stroke snowblower engine on a bike soon. I think with some porting, expansion pipe & carburetor. I'll be able to get 6+ hp with plenty of torque.
@@49ccscoot Gonna weld one up to fit onto the exhaust port. The engine has a fan shroud & pull start so it'll have air blowing on it at idle, along with extra air cooling when bike is moving. The bad part is they stopped making the 2 stroke snowblowers. But there always seems to be engines & SB for sale. I'm pretty sure I'd be able to find case bearings & seals to fit & chainsaw top end to fit later on.
@@49ccscootHey do you know what the safe max cylinder head temp limit should be for a small aur còoled 2 stroke? I set my warning ⚠ guarge at 310F ....Once it hits 310 I slow down & get under 300....My temp guage is accurate. Would it be safe to cruise along at 310F for several miles/minutes. Or is it too hot 🔥 causing ex port area to be dangerously hot.
@@michaelbrinks8089 I always suggest getting used to what the gauge reads when the engine is happy while tuning. Only then should it be used to monitor. I have had CHTs that would seize at 300 and others that were fine at say 350F. Others say over 400F can be OK for max. None of mine would ever make it there without problems. Depends on the exact sensor location and type of sensor and how much air can get around it and so on. If the main jet is rich enough, CHT should level out and it should be OK to cruise WOT. I can't tell you what that temp will be. If low throttle gets close to wide open temps, stay away from that throttle range till you richen part throttle settings.
@@49ccscoot Thanks for the reply........Next ride I'm gonna get up to 310F then see what temp the digital temp gun says the ex port area is. If it's not much higher than CHT. Then I could probably get away with 320 or 325 cht max temp.
I recently saw a video regarding expansion chambers effect on dynamic compression ratio. On turbocharged cars as boost rises so does compression pressure or dynamic compression ratio. Expansion chambers can increas dynamic compression ratio and this is one of the reasons for retarding the timing at optimum/ high rpm. Did you know this already? I didn't!
Good info. Basically anything that is changing how much mixture you can cram into the cylinder will affect dynamic CR, unless you're looking at DCR as strictly related to valve or port events... which I call corrected CR.
So I got a question what do you think might happen if I ran a100 gas in my 70cc Taiwan cylinder whit a high compression head and a iridium plug it has new coil which is stronger than oem is it possible to get quicker or faster I guess more torque or it will just blow the engine up
If it runs OK on pump gas without detonation, you're probably just wasting your money. There may be benefit with increased compression and/or ignition timing, but you'd probably get even more from oxygenated race fuels... with a higher price tag.
@@preslavnikolov923 It will probably be OK with premium pump gas unless compression is very high. My engine has 15:1 uncorrected compression with high advance and ran fine on premium pump gas for a long time.
hello i have an question . i just got an yamaha tmax 500 2004 and i want to make with this scooter 5000km trip. what i sjhould to check to don't have surprise?
That's an oil change distance, so I would definitely do an oil and filter change and gear oil just prior to departure. Do a thorough inspection of basics, like tire pressure and condition, lights and so on. I would suggest looking at the maintenance schedule in the manual and seeing what it may be time for. When I was going away for a week on my TMAX, I pulled the CVT cover off to make sure the belt was in good shape prior. It's never a bad idea to lube cables, grease pivot points and so on. It's not a bad idea to carry at least some basic tools along and make sure you're capable of carrying what you need safely and securely on the scoot well beforehand. Good luck and have a great adventure!
Bought cylinder wich was oval,egg-shaped,didnt fit.Same I write on all your videos.Petrol is the most un-wanted in a motor.Fried burned cylinder.All usa cars has 6-8 cylinder,use over 1 litres pr 10km.300 million people on same road 16-100 year.Had given 1000hp,tourqe,200km\h 10 second.Also a smaller piston,and fewer rings.You have 1 ring,normal.Its 5 ring on 139qmb,for school-teachers,oil,scrape."Engine-damage" 0.2 mm alu hold back piston,LIES.So little,hair in cylinder,stop.
A win for scotchbright! Hopefully the C piston is with you soon. 😊
I like the 49ccscoot wall light :)
I couldn't resist.
@@49ccscoot 86ccscoot hehehe, or is it 94 now? Yep, the neon light logo is pretty cool!
I'm with you on this one. Better to tune on this cylinder than on a new one. I hope you get to tune the carb on T2 and it runs like a bat out of hell.
i have learned so much tunning and general 2 stroke knowledge from you keep up the great content man :)
The title "DESTROYER OF PISTONS" at the start was the best thing ever 😂.
I was wondering if you were going to be able to get the cylinder cleaned up. Great to see you did and exactly how you did it! Great content as always!
I read this about the ignition (MVT) that you use on your Malossi engine. and thought you might want to see it...
if you want a link to the place, just say (-:
MVT DD ignition timing for 50cc stroke engines should be 0.40 before TDC, while for any other stroke and long stroke the timing should be between 0.30 and 0.35 max. Failure to comply with this condition may result in an abnormally high temperature in the stator, which may cause irreversible damage.
Thanks for sharing that. I wonder why it would overheat if out of that range a little.
@@49ccscoot it is not make for a 100cc Motor
@@bp-tuningaeroxlc-dd6474 If the stator is overheating though, it shouldn't know what size the engine is. It basically just spins and processes signals, so I'm assuming it's an electronics based issue that maybe too much advance or delay causes. The only way I'd think engine size would have any bearing there would be possibly related to dwell related to stroke and conrod length, but it seems like it should be so marginal.
@@49ccscoot yes exactly. the stroke length.
MVT ignition should according to what I read, then the MVT ignition that you use should not be suitable for Engine with Rod85 cranks or longer stroke.. or is it not recommended? you use MVT Ignition on engine
over 70cc.
I have read that about the MVT ignition
Good information, thanks for sharing your videos. 👍
Tremendous results.
I just made my instant ramen soup and I’m ready for watching 🎉😊
I must have bailed on the last video before the piston damage was discovered. That blows (by.)
No words 👌
Good info as always!
I use a split mandrel in my flex grinder and the finest emery cloth i can get ahold of on nikasil power equipment cylinders
Pretty cool 👍
I don't have a scooter but do have a 2 stroke motorized bicycle.....Gonna put a 4.5hp 2 stroke snowblower engine on a bike soon. I think with some porting, expansion pipe & carburetor. I'll be able to get 6+ hp with plenty of torque.
Nice. Do they make expansion chambers for the snowblower engine or are you going to build one or modify one for a similar engine?
@@49ccscoot Gonna weld one up to fit onto the exhaust port. The engine has a fan shroud & pull start so it'll have air blowing on it at idle, along with extra air cooling when bike is moving. The bad part is they stopped making the 2 stroke snowblowers. But there always seems to be engines & SB for sale. I'm pretty sure I'd be able to find case bearings & seals to fit & chainsaw top end to fit later on.
@@49ccscootHey do you know what the safe max cylinder head temp limit should be for a small aur còoled 2 stroke?
I set my warning ⚠ guarge at 310F ....Once it hits 310 I slow down & get under 300....My temp guage is accurate. Would it be safe to cruise along at 310F for several miles/minutes. Or is it too hot 🔥 causing ex port area to be dangerously hot.
@@michaelbrinks8089 I always suggest getting used to what the gauge reads when the engine is happy while tuning. Only then should it be used to monitor. I have had CHTs that would seize at 300 and others that were fine at say 350F. Others say over 400F can be OK for max. None of mine would ever make it there without problems. Depends on the exact sensor location and type of sensor and how much air can get around it and so on. If the main jet is rich enough, CHT should level out and it should be OK to cruise WOT. I can't tell you what that temp will be. If low throttle gets close to wide open temps, stay away from that throttle range till you richen part throttle settings.
@@49ccscoot
Thanks for the reply........Next ride I'm gonna get up to 310F then see what temp the digital temp gun says the ex port area is. If it's not much higher than CHT. Then I could probably get away with 320 or 325 cht max temp.
nice video
I recently saw a video regarding expansion chambers effect on dynamic compression ratio.
On turbocharged cars as boost rises so does compression pressure or dynamic compression ratio.
Expansion chambers can increas dynamic compression ratio and this is one of the reasons for retarding the timing at optimum/ high rpm.
Did you know this already?
I didn't!
Good info. Basically anything that is changing how much mixture you can cram into the cylinder will affect dynamic CR, unless you're looking at DCR as strictly related to valve or port events... which I call corrected CR.
where would you recommend putting the temp sensor lead on an air cooled minerelli clone? are you modifying the head so it'll go around the plug?
I just cut a little of a fin if needed to fit an under plug sensor.
Do I have to make holes on the piston for the bridge or is it ok without them
Mine has been OK without, but a lot of people do it. Wiseco puts in the instructions with piston kits, so if you want a guide look that up.
So I got a question what do you think might happen if I ran a100 gas in my 70cc Taiwan cylinder whit a high compression head and a iridium plug it has new coil which is stronger than oem is it possible to get quicker or faster I guess more torque or it will just blow the engine up
If it runs OK on pump gas without detonation, you're probably just wasting your money. There may be benefit with increased compression and/or ignition timing, but you'd probably get even more from oxygenated race fuels... with a higher price tag.
@49ccscoot I have a tuning tnt key for the magneto I am going to install it in 2 or 3 days
@@preslavnikolov923 It will probably be OK with premium pump gas unless compression is very high. My engine has 15:1 uncorrected compression with high advance and ran fine on premium pump gas for a long time.
nice :3
hello i have an question . i just got an yamaha tmax 500 2004 and i want to make with this scooter 5000km trip. what i sjhould to check to don't have surprise?
That's an oil change distance, so I would definitely do an oil and filter change and gear oil just prior to departure. Do a thorough inspection of basics, like tire pressure and condition, lights and so on. I would suggest looking at the maintenance schedule in the manual and seeing what it may be time for. When I was going away for a week on my TMAX, I pulled the CVT cover off to make sure the belt was in good shape prior. It's never a bad idea to lube cables, grease pivot points and so on.
It's not a bad idea to carry at least some basic tools along and make sure you're capable of carrying what you need safely and securely on the scoot well beforehand.
Good luck and have a great adventure!
@@49ccscootthx a lot for this advice. god bless you
Salut, tu vas remettre l'allumage mvt dd ? Ou reprendre un autre allumage ?
I have another ignition ordered, but it's in the same order as the piston so I probably won't see it till March.
@@49ccscoot Ah ok, perfect, the malossi ignition is very good, pvl stage6 ou polini are perfect too.
Hi scooter tuning ca are they trusted seller sir
I buy from them often.
@@49ccscoot ok sir thank you
🔥💯✊💪🛵🏁
Bought cylinder wich was oval,egg-shaped,didnt fit.Same I write on all your videos.Petrol is the most un-wanted in a motor.Fried burned cylinder.All usa cars has 6-8 cylinder,use over 1 litres pr 10km.300 million people on same road 16-100 year.Had given 1000hp,tourqe,200km\h 10 second.Also a smaller piston,and fewer rings.You have 1 ring,normal.Its 5 ring on 139qmb,for school-teachers,oil,scrape."Engine-damage" 0.2 mm alu hold back piston,LIES.So little,hair in cylinder,stop.