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As an update, I just installed the new 30mm Mikuni that arrived the other day. I installed a 115 main and 30 slow jet for Son of Weldangrind's 230 pushrod China motor, and it is still lean. I'll be back at the bike shop on Tuesday to buy a larger slow jet. Even with the pilot screw backed out two full turns, there is considerable backfiring through the exhaust.
BTW, we're using a factory 1983 XR200R air filter and a Hummer muffler (which is pretty much a straight pipe like a Gio).
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Weldangrind
"I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
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