vespa px gerchange

[Den 08]

help please, i have just put a new cruciform in a px 125 disc (flat type) everything seems fine riding, from neutral to first to fourth etc except when i go from 4th back up box it is a barsteward to the point of almost stalling. going one way through gears fine. but coming back just not having it really stiff, clutch seems to be engaging good, gear cables seem ok. just wondering if anyone has had this before any comments and advice welcome its doing me head in starting to think i know nothing (probably true) oh i have taken the selector box off and all seems ok on cables but the pushrod does offer some resistance but not sure what i am suposed to be feeling apart from f@@£3d off.
Den

[timexit17]

cruciform in upside down?
cruciform washer missing?

[Den 08]

to be honest i thought that the disc had no washer there was not one when i took it apart and i did look at cruciform it was flat so i assumed it made no differance

[dopeshots]

check out this link for an exploded diagram. The washer is no 12. hope that helps?

http://www.sip-scootershop.com/ersatzte ... nshaft-239

[Den 08]

check out this link for an exploded diagram. The washer is no 12. hope that helps?


http://www.sip-scootershop.com/ersatzte ... nshaft-239

it does help but i have read that on disc models from 98 no washer but there definatly was not one when stripped but now im starting to wonder ,can i put one on on whilst still in situe if that makes sence.
den

[paul d]

I'd put money on it being a cable problem . Often when they start to fray they work great in one direction but not the other .

[hungdog]

no washer on disc type

[Den 08]

thanks all
it was clutch, steels warped (obvious now )

nearly run, in really pleased running standard carb 20/20 delly with race crank standard gears px 125, matched crankcase to kit 166 molossi and simini exhaust thinking now 24mm delly
read a few bad reviews for the spaco carb are that bad? but genuine dellorto seems hatd to come by missed a few on ebay is there much differance between t5 24mm and p2 24mm carbs,
and lastly any sugestions on a good exhaust or will the simi be enough sugestions please.
Den

[joeythescooterboy]

cruciform in upside down?

Den, this can be a serious problem.......
take a long hard look at your cruciform, at first glance it could look like an "x" whereas really it should look like a "+"
If you arrange it so that it looks like a "+" as opposed to an "X" with at least one of the legs perpendicular to the horizontal axis then I can guarantee that it is not upside down!





































































Oh and flat type has no washer!

I'd say a crimped/snagged cable.

[taff763]

Have you tried adjusting your selector, one cable might be pulling ok, to get you up the gears but the other might be slack causing poor gear engagment coming down the gears?