Scooterotica

hi my mate has a rapido 225 with an amal 34mm carb 320mj needle jet 207 needle2D1 pilot 35 choke50, the problem is he has a lot of spit back and is very boggy and running rich any ideas thanks

There is only one answer to your question, you need to get the carb set up by someone who knows what they are doing and or on a dyno.

a dyno session is deffo in order here to check things out ,as fairspares recomends .
but its quite normal for a certain amount of spit back to occur at low revs on a tuned (piston ported )motor...has the inlet timing been extended /piston skirt cut ?
how does it perform and run generally ?

thanks for the replies i did tell him to get it set up on a dyno but i'm afraid he is running a very tight budget,its very boggy when setting off only clears when the main jet kicks in.

Fit a remote...

can you give us a bit more info , if its not had any tuning work and is a rapido classic it could be a case that the 34mm carb is to big.

Id go along with the above ian. Aint no need for a 34 carb on even a half decent tuned rapido bud. No wonder the guys skint ...lol. get him over to petes mate. .wat size do u av on ur hb ts1? Itt smaller than that isn't it? An id guess urs higher state ov tune. Psl visit for him. steve.

What no.slide being used,i found 4 works best. Also is the needle new or an old one? New needle will make a difference. These carbs should be easy to setup and you only have one size needle to play with.