bike has nasty backfire on idle (finally got it running)

[malloym]

so after sitting for a year I finally gave life to my chop today... the thing ran like a top before the cafe to brat change over.. the only things I changed to the engine was a hugh PM setup and the mikesxs carbs...

I can get the bike to start 2nd kick. however it sounds like a shotgun. it's got a real nasty backfireon idle ( i didn't even want to drive it )... the rpms don't seem to high... I put my hand over the pipes and in the matter of 4 seconds my hand was black (covered in soot)

anyone got any ideas??? i'm thinking it's either igniton or the carbs are soo outa wack it's not even funny.

 

[malloym]

anyone???

 

[xjwmx]

It's the latter. You put on new carbs, and they're way too rich. It can cause wear on the cylinders and rings to run it that way for long.

 

[malloym]

so i guess these pkw carbs are junk then??

 

[xjwmx]

I'm not saying that. You should expect to do at least a little tuning on any new carb.

 

[malloym]

i don't think alittle tuning is going to cut it.. my bike is running on life support and I can't seem to find any data on these carbs for tuning.... it's like trying to take a piss in the dark.

 

[XSLeo]

There is a couple threads on these carbs. Do a little research and you may find an answer.
Leo

 

[BigJimmyW13]

MrRiggs did a huge thread on these. Use the search!