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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
4 cycling 2 cycle
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[QUOTE="David Trustrum, post: 150400, member: 21529"] Yeah my Beta definitely responded most to pilot jet mods as you are riding the bike from there all the time & it needs to clean out instantly. That is after I threw away the junk carb that was on there before. Fortunately the Italians decided to use a Mikuni on the later models like yours so its just a case of trying smaller jets until it hesitates & can’t be tuned out by airscrew any more then go back one. Mines running 22.5 but airscrew is fully in so really needs a 25, but don’t take this as gospel as mines somewhat older but I started with jetting specs from a late Beta & didn’t end up too far off. PS think you should be down to ~ a 140 main [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
4 cycling 2 cycle
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