won't shift into second

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fairspares
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Joined: Thu Jun 24, 2010 7:48 pm
Main scooter: Lambretta GP RB252
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picture quality is great but come out a bit away from gear swivel to show more . want to see gear arm also and what gear if any is it in.
is this a new gearbox / selector or your only having problems since rebuild ?
Fairspares Lambretta workshop.
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Main scooter: Vespa PX221 disc
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since rebuild. i changed the rear hub bearing to a casa one and fit it all back on together again. i can shift thtough all gears with the exception of the 2nd so i doubt this has anything to do with the arm or the loose gear position..
fairspares
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Main scooter: Lambretta GP RB252
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i take it you torqued down the rear hub then checked layshaft / endplate shim clearance, more than likely this will change as you changed rear hub bearing and have tightened the clutch nut ?
Fairspares Lambretta workshop.
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Main scooter: Vespa PX221 disc
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auch! i havent checked the measure of the layshaft/ endplate shim gap , i thought it was unnecessary since all the other parts remained the same could that be the reason :?: :?: can bad shimming cause such a problem?
fairspares
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Posts: 361
Joined: Thu Jun 24, 2010 7:48 pm
Main scooter: Lambretta GP RB252
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rear bearings differ and will alter the shimming , at least check endplate shimming but i would remove endplate and check gearbox / selector and gear fork/gear arm are set correct .
Last edited by fairspares on Wed Jul 06, 2016 5:58 pm, edited 1 time in total.
Fairspares Lambretta workshop.
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Posts: 143
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Main scooter: Vespa PX221 disc
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will do. thanks for the tips.
Minority
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Main scooter: Li230 S3
Location: Perth, Western Australia
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Noticed that your inner is frayed, could that be causing problems (maybe frayed inside the outer as well). I'd be changing it anyway!
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HxPaul
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Main scooter: lambretta Li 150
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Minority wrote:Noticed that your inner is frayed, could that be causing problems (maybe frayed inside the outer as well). I'd be changing it anyway!
+1.You are also using the wrong gearchange trunnions,the ones you are using stand up too far and your clutch cable doesn't have a straight pull.When you op.erate the clutch it will put pressure onto your gearchange,moving the swivel.
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