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Post by fredperrybruce on Jul 29, 2014 20:46:04 GMT
Hi all,
Have just brought a Mk1 PX vespa have taken out for 100+ mile's thought I would check engine out and found that the flywheel is pretty trashed.
There are at'least 4 fins that have broken off and 2 that have cracked, Silly question would this affect the timing of the engine and drastically affect the performance as I don't want to start buying new parts (APART FROM THE FLYWHEEL) if the main problem is the above!!!!
Any comment's appreciated
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Post by vespasco on Jul 29, 2014 21:58:47 GMT
Change the flywheel
Missing fins should not really affect the timing.
Your crank should be fine
Hopefully its a straight swap with nothing else needing doing.
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Post by henri on Jul 30, 2014 9:36:59 GMT
missing fins is usually a sign of removal without proper tool , as vespaco said wont affect timing but will lessen the fans cooling effect ,your in pompey ,my spider senses tell me theres a trip to allstyles in your future , or beedspeed do ok flywheels , i use lml genuine staters n flywheels as there identical to px electronics ,just need connecters changing if yours is a plug rather than individual spades ,an about half the price . H
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Post by sbwnik on Jul 30, 2014 15:52:18 GMT
My flywheel is missing a couple of fins (emergency repair about seven or eight years ago) and is been fine.
Does anyone know (and have photos of) what a proper 200 flywheel looks like?
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Post by vespasco on Jul 31, 2014 18:37:45 GMT
I always look for the curved fins when trying to indentify a 200 flywheel Im not sure how relevant that is anymore on newer models Nowadays i see people advertising flywheels for 125,150 n 200 all with straight fins?! My fav is the electric start flywheel with the large cog removed: - 300grms lighter  You should also take into conCideRation how well it is balanced. And what it is doung to your crank n bearings. |
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Post by sbwnik on Jul 31, 2014 18:50:25 GMT
That's why I'm asking... Can't remember if it's curved or straight fins, thanks.
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Post by henri on Jul 31, 2014 19:20:10 GMT
ive never found out ,curved/straight, think its prob like points flywheels having magnets to trigger lectronic sparks, piaggio using "common parts" an saving lira , why there the longest/successful scoot maker.
an if goin lectric less/light flywheel , best to mask of the inside magnets really well, most scoot shops de-magnetise re-magnetize to be sure theres no filings stuck afterwards ,to short out the stater later, H
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Post by sbwnik on Jul 31, 2014 19:58:29 GMT
You can do the gear yourself. Two minutes with a dremmel and a lot of cleaning up.
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Post by vespasco on Aug 1, 2014 16:45:55 GMT
Its also possible to pry off the gear. Although the soft ali doesn't give you much to lever off if youre using a screwdriver or bar and it would easily break or crack the perimeter of the flywheel.
A large gear/bearing extractor would work better
Dremmel sounds much easier 'though, albeit a little messier.
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