Hi I have a nrg mc2 an I've just fitted a malossi 70cc bore cylinder and head with a malossi 7.2 rollers and malossi varaitor 21mm carb Leo Vince zx exhaust
And for some reason it doesn't start to well and when it does it's very high revs before the bike moves and when it
Does it bogs so it only just about stays ticking over
Can someone pls help me
it's very high revs before the bike moves
clutch springs? or could be rollers too heavy, 70cc kits rev higher than 50's so you need lighter rollers to compensate the different powerband
it bogs so it only just about stays ticking over
what main jet are you running?
Ok sounds good I'm gonna try that tomorrow and I've got a 82 jet but I've been told to run 118
start from 118, ride for abit see how it is, check spark plug colour, if it's black or very dark, then go down a few sizes, keep doing that until it rides good and you've got a nice brown colour spark plug
Would u happen to know what clutch springs I should get an I will do that an let u know thanks mate
You've got a 21mm carb which normally gets rid of the need to upjet. Your bogging problem is due to the increase in fuel in the mixture but you have not increased the air flow to compensate for the increase in fuel
Also a bike revs higher with lighter rollers not heavier ones. But yours seem to be a good weight I dont think thats your problem.
If its high revving you might want to fiddle with the mixture screw on the carb also the idle screw until you hear a difference.
You would need to fit the clutch springs supplied with your exhaust and they should work in perfect conjunction with your exhausts power band.
I'll have a go of that in the morning nice one I've got stage6 clutch springs mid strength do you think they will be alright
