SOHC.co.uk Forums > CB750

PD Carbs versus Kehin Round Carbs

<< < (2/2)

K2-K6:
Regarding jetting,  I feel it's often missed that a big bore kit will just suck more air through the carb,  accompanied by more fuel.

Initially it's partially self correcting if using the same intake system so not such a dramatic change of jet sizes as often projected.

Suggest try with std,  plus raise needle by one notch (fourth groove down from top of needle) shift idle adjust screw 1/8 to 1/4 turn more fuel.

Also run with either NGK 8 plugs or even 9 grade initially.  This will mitigate against getting the plugs too hot if it runs lean, to help in avoiding pre-ignition risk.

Try it from there,  have a feel of behavior and good look at the plug's colour to see where you are.

Navigation

[0] Message Index

[*] Previous page