Ok i have a vetos 240 kit fmf pipe vfoce3 reeds spacer plate twist throttle pre filter on airbox cover and k&n filter and a 28mm mikuni carb that i have a 330 main in it at 3/4 to full throttle it breaks up plug is a little dark but it is dry shoud i go bigger or smaller on main
Jetting 240
- Thread starter Blaster bob
- Start date
thats a unique combonation you're running Bob
most who jump to the 240 cylinder don't run FMF's and 28mm carbs,
a toomey or right bend pipe and a 34/35/36mm keihin carb are the norm for 240's, and we have jetting info on.
I have run/seen 330 main jets on 200cc cylinders, my guess is you will need to go richer.
you say the plug was dark & dry, was that after a proper plug chop ?
http://www.blasterforum.com/threads/how-to-plug-chop.53237/
/\ thats the best way to tune that main jet.
most who jump to the 240 cylinder don't run FMF's and 28mm carbs,
a toomey or right bend pipe and a 34/35/36mm keihin carb are the norm for 240's, and we have jetting info on.
I have run/seen 330 main jets on 200cc cylinders, my guess is you will need to go richer.
you say the plug was dark & dry, was that after a proper plug chop ?
http://www.blasterforum.com/threads/how-to-plug-chop.53237/
/\ thats the best way to tune that main jet.
Well the 28mm is a carb i bought for a differnt blaster and im getting the money up for a right bend pipe the 2 bigger jets i have ate 340 and a 370 from a yz250 i did i was thinking the 370
As mentioned proper plug chop (or read) is only way to tell. Dark plug could be from mid range (needle) .
You said it breaks up, does it go flat (stop pulling, increase rpm) or does it start blubbering?
A quick and dirty test would be to pull choke halfway out when it starts to break up.
You said it breaks up, does it go flat (stop pulling, increase rpm) or does it start blubbering?
A quick and dirty test would be to pull choke halfway out when it starts to break up.
