I’m absolutely sure.
My bike came with 40’s. I verify each with a 10X loupe.
I’ve flip-flopped them 4 times with 42’s cause of skepticism.
42’s work, but needle settings are ¼ left and ½ turn out right.(4 times with same results)

One major improvement I cannot believe I skipped is FLOAT LEVEL.

Stock is 17mm. I raised it to 16mm, meaning I raised my fuel level in carb (da).

I never paid attention to it for 2 months till I thoroughly and slowly read this web site (I read this web site over and over).

http://www.factorypro.com/tech/carbtun.html


Float level affects all area’s engine performance. Idle, cruise, WOT from any RPM’s.

I’m a little slow, I’m guessing SOTP means,,,,,,, “seat of the pants”.

Quite a few web sites say 13.0 is the power number. 14.7 is the economy.

You can see(I can see) on the graphs from a 14.0 AFR cruise speed to WOT, it doesn’t really pull till it hits 13.2 down to 12.8(please, no quotes) .


I'm starting to wander,sorry


Last edited by burtard; 06/03/2010 10:42 AM.