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The rebirth of Lazarus
Oddjob:
Remove the gearchange shaft, get a screwdriver and fit it into the screw on the end of the gearchange drum. Whilst rotating the clutch shaft turn the screwdriver and see if it goes up and down ok using just that method. If it does, it's either the pins in the drum which the gearchange shaft engages onto or the shaft itself. If it doesn't it's not the gearchange shaft so you can eliminate that.
Did you assemble the engine in the top case or the bottom case?
Bryanj:
I cant think of anything internal that would allow upchange but not down change, try rotating both shaft when trying, especially 5th down to 2nd
mickwinf:
will have a look tomorrow. I assembled it in the upper crankcase
Oddjob:
Bit late to say this Mick but ALWAYS do a dry run changing gears when it's still in the top case, do the screwdriver trick and you can not only make sure all the gears select but also you can watch the gears engaging and spot any problems.
mickwinf:
Well i had a fiddle with things and it seems to work ok now, i think i was not spinning the shafts enough. So i thought i would assemble the clutch, and all went well until the final bolt sheared off! Will sort that another day, Lazarus will live!
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