Are spares available for the 250s?

Excellent article in the February CdF on the HS.

Can someone tell me why there are two frame prefixes for 1955? Frames left over from 1954 perhaps?

JohnnyBeckett wrote: ↑Sat Feb 03, 2024 12:10 pm hi i would get a set of cork plates off the clubs gearbox and clutch parts like i have done to my bike now it's a nice clutch with no slip

I agree, the cork clutch is excellent as are the parts available from club spares.

I'm on the home straight with my SQ4 gearbox now. In what may be the second to last trial assembly, I have 1.11 movement on the sleeve gear, gearbox in top, sprocket not tightened up. I'm now ready to make the spacer to move the sleeve gear inboard. I've currently got 2/3 of the sleeve gear spline l...

The fun bit is getting the temper right - I had two goes at that with the stand springs. The side stand clip might be easier (as it's a bit smaller) but I found controlling the temperature across the whole spring simultaneously quite difficult. I've used a domestic oven for things like knife blades ...

I'd attempt to make one. Alan Moore did some very good posts on making W/NG fields stand springs which would show you what to do.

Wow. Well done guys, it's so impressive what a group of dedicated people can achieve.

2 questions: Has the nut on the kickstart end of the mainshaft got a large internal chamfer on the side which should abut the kickstart ratchet? No. There's a small chamfer, sufficient to clear the bottom of the thread on the shaft. I'll turn a shallow depression there, 0.5 mm deep, to reduce the e...

Here's the mainshaft end float Mick, you can see the gap under the nut.


Light bulb moment - the mainshaft doesn't pull up against the bearing, because the end float is needed to allow mainshaft third to spin.

Not sure how to rationalise near zero axial on the mainshaft small bearing and 0.040" end float on the shaft, was the clamping to the bearing inner removed when measured? No - I hadn't dismantled anything bar the clutch at that point. I'll put the mainshaft back in without the rest of the clus...