Jetting question for 94 CR500, Please....

[Cody19670001]

I have a 94 CR 500 that has a 90mm bore rather than the stock 89. Right now I just put in:

The following stock settings:

170 main
55 pilot
Stock Needle (1368) in the 3rd clip
And 1.5 turns on the air screw
I am also running the stock pipe and muffler on this 500
I mix my fuel 32 to 1 on pump 91 octane.

I guess technically the displacement is closer to a 502

Any ideas if I should adjust jetting based on this slight bump in displacement? I ride at 900 feet above sea level and it's been 50 to 60 degrees lately.

I did drop in a new 90 mm piston and thoroughly cleaned the carb. It just doesn't seem as responsive as my other 500 which is a 97 with a stock bore where I run the same settings except for a 2nd clip position on the needle because I have a Gnarly pipe and Turbine Core silencer.


I would appreciate any thoughts.

Thanks ,

Cody

[OUTKAST INC.]

don't think you will need to compensate for the bigger bore, have you run it long enough to get the rings seated and the piston to loosen up ? does it lean surge at idle? rpm hunting up and down?

[iggys-amsoil]

The bore dosen't matter, its what the motor wants that matters and not so much the mix. Why not 50:1.

A 1468 needle / DGJ seems to be liked very much. Or try the 2nd clip with the stock needle.