Re: Garelli Bimatic engine issue

Born to be WillD /
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DOPE!

So by revving do you mean spinning the wheel? and by getting louder does it actually increase in RPMS?

what I'm picturing is that your clutch is bad or worn, and not engaging. So it'll run and the engine'll go, but never engage the wheel. then when you pull the starter it forces the clutch to engage, basically by squishing it, and it starts turning the wheel etc.

an alternate but similar scenario is that the clutches are swollen and stuck and that's keeping it from spinning because the wheel's not moving or locked up somewhere etc. that way the engine's running but when you throttle it up it can't rev because it's trying to turn the non-moving/locked up wheel or whatev. the "getting louder" would just be because alotta sound comes out the intake anyway, and you're opening that up more. But yea, then when pulling the starter you're actually DISENGAGING the clutch somehow (like unsticking it or suttn) and the engine can rev free.

either way a big problem with garellis is the clutches, and it's usually due to using the wrong fluid, either you or someone before. They NEED nondetergent SAE oil, like SAE 30 ND. it's very important it's nondetergent, and especially that it's not transmission fluid in there, because that can deteriorate and/or swell the clutches. Sometiems they can be salvaged by soaking in mineral spirits, but usually replacement is about the only option.

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