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Post by roachcoach on Jun 12, 2007 18:03:33 GMT
Hi there.
I have a 1998 PX 200 Disc that has recently developed a rattle somewhere within the engine. Motor still runs ok (at the minute!) the 'rattle' is really noticable when idling - Is it the small end or worse....? Any suggestions?
Thanks for your help
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Post by Smallframe on Jun 12, 2007 18:11:40 GMT
without hearing engine it could be a multitude of things but let me kick off with one suggestion.
The gear selector arm has a pin in the bottom of it and this pin has worked loose allowing a light ratling of the arm and thus very slightly selecting your gears. As I say its just a suggestion and it could be flywheel bearing or any number of probs but I thought I'd kick this one off for you GOOD LUCK
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Post by dto79px on Jun 12, 2007 18:55:11 GMT
You don't say wot milage bike has done  if high milage,not service regulary , thrashed or cheap 2-stroke oil used then it could be small end or piston slap  bottom end on px is strong and a top end rebuild is both cheap and easy to do one's self  |
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Post by roachcoach on Jun 12, 2007 19:21:41 GMT
Milage 9500 had it a year unsure of history - I've done 4000 miles two oil changes oil used is SCOOTR. Wise to change small end first then work from there...?
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Post by scooterwarehouse on Jun 12, 2007 19:31:47 GMT
The fact that you say it happens when on tick over makes me think it could well be your clutch centre nut come loose.It makes a real knocking which sounds like the big end going.If this is the problem don't ride it because you can wreck the keyway on the Crank and the Clutch.
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Post by dto79px on Jun 13, 2007 17:42:59 GMT
Milage 9500 had it a year unsure of history - I've done 4000 miles two oil changes oil used is SCOOTR. it's a 2 stroke it burns the oil you don't need to change it  |
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Post by roachcoach on Jun 14, 2007 11:30:14 GMT
That'll be gear box oil change then
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Post by bryno on Jun 14, 2007 11:47:07 GMT
Does the rattle change at all when you pull the clutch in? or put it into gear? if so, it is probably more clutch /gearbox related than piston/barrel/big or little end.
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Post by roachcoach on Jun 14, 2007 12:48:53 GMT
Its a good point bryno, there is a definite change in noise when clutch is pulled in, having read my Haynes again I have now changed my mind and think its clutch overhaul required. Not done this before I think mine (1998 disc) is a 4 plate clutch (?) and I will not need a specialist clutch socket, is this correct...? Also have read that it is possible to change clutch without dropping engine, is this true? Any advice welcome!!
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Post by bryno on Jun 14, 2007 13:06:48 GMT
I'd certainly start with looking at the clutch.. they can get noisy on idle.. Yep, you need a special socket to remove the nut, you could make one but they are cheap enough to buy. Can't recall but you may need a puller of some sort to free it from the shaft, sure Mr Haynes will clarify  Not done a clutch myself, but it can be done with engine in, just need to whip the back wheel off to get to the clutch housing, looks easy enough, let us know how you get on.. |
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Post by dto79px on Jun 14, 2007 21:58:29 GMT
^ and unbolt rear shock bottom mount , it lets engine drop down more , support with a bit of wood and keep an eye on pipes and cable are not stretched |
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Post by joey on Jun 14, 2007 22:24:30 GMT
Panels off, lie it down on a matress/blanket, rear wheel off then you have access to clutch cover. no need to undo the cable, just be careful when moving cover out of the way.
If it's a cosa clutch then there is no need for a special tool just a standard 18 or 19mm socket. Best to get a clutch holding tool though!
By the way, the problem you describe is actually quite normal if it lessens as you pull the clutch in, just a foible of the P200. Not long put all new bearings and seals in mine and it still makes the same noise, but best check it out to be on the safe side.
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