Jetting Changes for hi comp piston?

i have a hi comp piston installed - other than winding out the air/fuel screw 1/4 to 1/2 has anyone made any jetting changes?

('05wr450 - JE 13.5)

cheers.

Hi,

Every bike is different so a better idea is to use a wideband sensor to jet your carb.

I've got a cp piston 13:1 and I'm going to install it at the end of the month. I'll send you my changes then.

If anything it will like it a hair leaner. Trying turning the fuel screw in a bit, maybe go down one on the main.

I have a 13.5-1 JE on my 07.

If your bike was jetted correctly before and the only modifcation is the piston and the displacement is the same. leave the jetting alone until you ride it and break it in. Then you can decide what if any changes need to be made.

If your bike was jetted correctly before and the only modifcation is the piston and the displacement is the same. leave the jetting alone until you ride it and break it in. Then you can decide what if any changes need to be made.

+2 on this

If anything it will like it a hair leaner. Trying turning the fuel screw in a bit, maybe go down one on the main.

I have a 13.5-1 JE on my 07.

thanks for that.

assuming it is run in i'm looking for peoples thoughts on what will need to be done.:banana:

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