clutch issues?

[hardway]

Originally Posted by Spicyunicorn

Is this a fresh motor? Reason I ask is 120 is great compression for a fresh motor but if it's not a plugged exhaust will increase compression reading unhook the exhaust and do another compression check if it drops try riding it a short distance with muffler still unhooked and see if it improves old two strokes mufflers can get plugged up after years of use from burning oil a muffler bbq may be in order

Top end was rebuilt by po.We torn it open to ensure it was done right. We replaced crank seals, also a muffler burn. Removed muffler and still have 120psi.Motor runs ok,clutches engage when on jack stands.Is primary rebuild-able,is there a way to check if it is bad?

[hardway]

Originally Posted by meimk

The clue here is "doesnt increase RPMs". The drive clutch can't do it's job if the engine rpms don't increase. It's the centrifugal force that forces the weights out to push the drive clutch tighter on the belt. Get the engine speed to increase and the clutch's should come to life. Back to basics fuel, spark, compression...

OK, what would keep engine rpm's down under load?

[reson4]

Originally Posted by hardway

OK, what would keep engine rpm's down under load?

Retarded ignition timing, plugged exhaust, or exhaust Port, governor not set right, throttle not opening properly, bad reeds if it's a Reed valve intake engine, crank seals, plugged air filter or intake hose, but I'm betting on the hyperactivebimetalfluxtransducer,,,,

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[reson4]

Originally Posted by reson4

Retarded ignition timing, plugged exhaust, or exhaust Port, governor not set right, throttle not opening properly, bad reeds if it's a Reed valve intake engine, crank seals, plugged air filter or intake hose, but I'm betting on the hyperactivebimetalfluxtransducer,,,,

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But it sounds like you've done your homework on this one, so now maybe ask a friend to help double check, maybe you are missing something that a fresh pair of eyes would see,,,

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[reson4]

Originally Posted by reson4

But it sounds like you've done your homework on this one, so now maybe ask a friend to help double check, maybe you are missing something that a fresh pair of eyes would see,,,

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Ah ha! If the driven pulley spring is too relaxed, broken, allowing the belt to ride too high on the front pulley right away, it would overload the engine, not letting it rev, and producing very little power?

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[hardway]

Originally Posted by reson4

Retarded ignition timing, plugged exhaust, or exhaust Port, governor not set right, throttle not opening properly, bad reeds if it's a Reed valve intake engine, crank seals, plugged air filter or intake hose, but I'm betting on th

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It does not have a hyperactivebimetalfluxtransducer, we did check the hyperactivebimetalfluxcapacitor. The only way to check was by doing a dry run and we achieved 88 mph.

[hardway]

Originally Posted by meimk

The clue here is "doesnt increase RPMs". The drive clutch can't do it's job if the engine rpms don't increase. It's the centrifugal force that forces the weights out to push the drive clutch tighter on the belt. Get the engine speed to increase and the clutch's should come to life. Back to basics fuel, spark, compression...

winner winner,did a muffler burn instead of bake (fire vs grill). cleaned out muffler better. we changed and gapped a new plug and waalaa. got around 10mph in 6 degree weather. THANK YOU 1 and all for your help and patience.

[reson4]

Originally Posted by hardway

winner winner,did a muffler burn instead of bake (fire vs grill). cleaned out muffler better. we changed and gapped a new plug and waalaa. got around 10mph in 6 degree weather. THANK YOU 1 and all for your help and patience.

Glad you got her going! I've got a pretty good ear for plugged mufflers, but have been fooled before too! Happy New year!

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