Need help with gear shift mechanism

[arl5370]

Hi guys,

Progress has been somewhat slow on the XS of late. I am having an issue with the gear selection, so wouldn't mind your thoughts.

I re-installed the gears and joined the crankcases, then tested the gear change. The selector pawls don't engage the pins in the change drum. So, when I move the gear shifter up and down, they don't pull the change drum around for the next gear. I fiddled with the adjuster but it doesn't seem to have anywhere near the range of adjustment I seem to need.

At one stage I manually rotated the shift drum and positioned the shift arms right next to a change pin, and I did get one gear change but that's it.

At the moment I have the cases split again (long story, involves not re-installing a shift rod e-clip ).

I have attached two pix. One shows the position of the pawls with the gear level depressed, the other their 'resting' state.

I'm kind of out of ideas. I thought I'd sort it today by re-installing everything and making sure the shift pawls were next to a pin but no joy.

Thanks,

Ade

 

[drewpy]

normally the engine is running when the gears change, have you spun the crank over when changing gears, you may find that is all that's the problem

 

[arl5370]

Thanks drewpy. I've been spinning the input and output shafts as best I can whilst operating the shift pedal but admittedly it's not very fast. I'll get my wife to give me a hand and see if that makes a difference. I imagine trying to move the gears whilst they're not spinning that fast puts strain on the shift pins, selector rods etc and all contributes to the problem.