A busy couple of weeks since my last post – last weekend was the Laverda meeting in Belgium and the weekend before that the Scottish rally. Reports are being written but in the meantime I’ve posted a report on my trip to Northern Ireland which you can find in the Trips section.
To get up to Scotland I had to fix the starting issue and put on new chains and sprockets.
The starting issue was traced to a defective starter motor – easy fix just take a motor off Atlas #2 – this had the advantage of already having the right gear for the Zane clutch so no whining gears on start up. I left the plastic cover off the engine just in case I needed access but so far so good.
More worrying is the wear on the gearbox output shaft.
Worn sprocket splines on the gearbox output shaft
I had a potential fix to this problem in the form of a new hardened sprocket with a shoulder on the back. This design makes use of the full length of the splines, is a tighter fit and won’t rock. To fit the sprocket I had to fit a different gearbox seal so the new sprocket can butt up against the gearbox end bearing.
New and old sprockets, old and new seals and tool to hook out old seal
Getting the old seal out proved simple enough – I used a hooked tool I found when out walking so not sure what you’re supposed to use it for! Anyhow once the old seal was out the new seal tapped in, tho’ not that sweetly as the outer edge starter to ‘peel’. I decided it was good enough.
I put locking fluid on the splines and tapped the sprocket home. You can see from the picture that instead of using a lock washer I’ve gone for a simple 21mm external circlip – no need for a lock washer you just need to take up end float on the sprocket (which shouldn’t move due to the locking fluid).
Finally hot on the heels of Matt Hale I had a visit from Dean Young on his rather lovely GTL 750. Top bike and top bloke – can’t think of a better way to while away an afternoon.
Nick 🙂
Bent screwdrivers, big hammers and old Laverdas 