Afr?

[Doveman]

Im new to the whole four wheeler thing, so please bear with me.

I have access to a dyno and would just like to know the correct/best AFR for my quad (see sig)

I plan on doin a FMF jet kit, k&n filter and a slip on.

I see that everyone with this year bike suggest the 165 main but since I can really tune this thing Id like to know the proper AFR.

Thanks in advance

-Robb

[jshtex]

I think the ideal theoretical number is 14.6 to 1, with that being 14.6 parts air to 1 part fuel. But really there are a lot of opinions about what is really best.

I prefer to try to shoot for something on the rich side, more in the 12 or 13 to 1 range.

[mcleod]

14.7 is the best AFR for fuel economy... not for performance :P

when riding at part throttle you could be at 14.7 but when you open it! you should read low 13 and maybe high 12 depending on setup and use.

[Doveman]

Thank you very much.

That tends to be very common for most NA cars as well.

I figure why not tune it on a dyno instead of guessing jets and needle position.

-Robb