Change of jetting?

[bazman]

Just bought a jl4 to replace my jl3, i know these pipes will rev on more but do i need to upjet the carb or keep an eye out and do plug chops ? Cheers Baz.

[corrado]

I'd take the safe route and upjet, one gives a Black plug and one leaves a Black hole in your piston.

[J1MS]

I'd take the safe route and upjet, one gives a Black plug and one leaves a Black hole in your piston.

Very wise words of wisdom

[bazman]

I'd take the safe route and upjet, one gives a Black plug and one leaves a Black hole in your piston.

Know that feeling well unfourtunately!
Al ( diablo) has informed me the jl4 is difficult to sort the mid range , as it's a race pipe essentially it's either all or nothing Well that's me sorted as sounds like the way i drive anyway