Saturday, 15 February 2014

A little dive into the gearbox

The kickstart shaft splines are worn - serves me right for keeping on buying cheap kickstarts in the '80s. So, a new kickstart shaft and kickstart have been bought - genuine parts - so time to swap it out.
The gearbox was o.k. last time it was on the road. I remember changing a few bushes and the bearings. Layshaft bearing was changed for a roller type, the original being a well known commando weak spot. I'm not going to do any other gearbox work just now, that'll wait until next winter.

Outer cover off

Breaker bar and 1/2" Whit socket - everything is whitworth on the gearbox.

How to hold the rear brake on when you don't have a foot brake pedal (its at the chromers in Hull!). Ratchet strap onto the brake cable connector, other end on front frame cross member. Gearbox into top and get busy with the breaker bar. 

New kickstart shaft fitted

Close up of inner casing and new kickstart shaft.
The shell on mine isn't a commando one, from the numbering on it it's pre 1962!!.(N prefix). Post 1962 have a NA prefix before the number, and commandos have the engine number stamped across the top lug. Inner & outer covers and the gearclusters are commando though

New gasket set and a pint of EP90 required for the rebuild.

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