Vespa PX 200 throttle control rod issue

[watto66]

Hello All ,

i was taking my 12 year old vespa PX 210 for it s annual MOT today when i thought the throttle cable had snapped ( typical !! ) i wasn't far from home so i pushed it back as you do. Upon inspection the cable is fine but ive noticed the throttle control rod has a play in it if i push it and put pressure from the grip end it is making the plastic throttle wheel move past the locater on the headset bottom.The plastic bush in the headset bottom seems to be securing it ok ( maybe im wrong ? ) and the plastic throttle wheel can only be located in one place by the spring circlip , is the movment coming from the grip end ? how is this shimmed because i can only see two washers where should they be located ? . Appreciate its getting older now should i be looking to replace the lot , rod , bush , throttle wheel and the small return spring that closes the throttle . Bit of a pain becuase it will all go back together and function but i'm sure when i take it on a road and vibrates etc it's going to happen again . Any ideas would be greatly appreciated.

Thanks

[wack 63]

The two shims, one sprung , keep tension on the throttle rod to stop side float but it sounds more like the headset has worn at the twist grip end . The rod has a welded on stop washer which sits in a small rebate on the headset, when this wears the rod can move inwards allowing the pulley stop to miss the headset stop( providing the pulley stop isn't worn) You can get around this by fitting an extra shim on the throttle rod once you have removed it.The two shims fit on the rod and push against the pulley wheel.

[watto66]

Thank you for that most helpful i think on isnpection the headset plastic bushes are worn also.


Thanks again.

[gaz_powell]

the softer plastic cable wheel often wears having been rubbed against the stop on the alloy headset bottom - its a sacrificial part - cheap and quick to replace but buy genuine as some of the pattern ones are really crap......which is surprising !!!!!!