jetting help please

[barneypeter]

been advised to downsize my carb from a 34 vhsb to a 30phbh ,its fitted to a 190 challenger kit with rd 350 reed block with a scootrs pipe at present ,any help would be good and to be slightly rich as running in with new piston cheers chaps

[J1MS]

been advised to downsize my carb from a 34 vhsb to a 30phbh ,its fitted to a 190 challenger kit with rd 350 reed block with a scootrs pipe at present ,any help would be good and to be slightly rich as running in with new piston cheers chaps

Its a fairly rare setup these days...your best bet is trying to contact Harry Barlow, or maybe Martin Cooke at Chiselspeeds there probably best equipped with the answers.....Im sure someone on here will have an Idea....... but I wouldnt know where to start without seeing the state of tune of the barrel... transfere's, Exhaust, Inlet, and compression ratio....sorry

[barneypeter]

thanks jims ,harry supplied new parts been trying to ring but hard man to get hold off he is really quite chuffed i think theres still one on the road it was he who said change to a 30mil ,will keep trying him cheers peter

[Special X]

try 52 idle
AV266 atomiser
X13 needle (X7 if this too rich)
128/130 main

Should be on the rich side of the ballpark for safety so you can have it dynoed to dial it in.