Thanks for these comments guys.


I mentioned in post number 8 above that I asked over on xrv for advice too. A lot of useful stuff came back from there.


On ADVrider on page 906 at Show us your TransAlp modifications! - Page 906 - ADVrider a TA guru (mas335: they only have 1989 model TAs in the USA, mine's an 88 engine, which is the same) says a “wiggle” of the sprocket on the shaft is normal. I believe the (possibly excessive/possibly not) sprocket wiggle/wobble on my bike is caused by a shagged out front sprocket cause by a too tight chain combined with deceasing sprocket carrier bearing pulling the front sprocket in all sorts of directions and enlarging the hole.


I also have a 1995 rd07 Africa Twin at home and the teeth on the shaft (it has 8 teeth, rather than the Transalp's 6) are about a third worn away!! (from using non-oem sprockets by previous owners: the holes on non-oem sprockets are harder than the shaft, so the shaft wears; on oem sprockets, the hole is softer, so the hole wears, not the shaft, I believe). By comparison, the shaft on my Transalp looks virtually mint!


I think only a new sprocket (and an a couple of spares) held on with a modified retainer (thanks for the advice ref heat treatment/hardening) is the way to go. I have a 87 Transalp (also same shaft as on 88 and 89 models) at home, so can use this as a demo-model.



With regard to possible welding, what I can also do is bolt and weld a second sprocket (with teeth ground off) onto the outside of the “main” sprocket. This will increase the length of the surface that connects to the shaft, and then the outer bit can be spot welded onto the end of the shaft and also (hopefully) removed again with a (small) angle-grinder.



Cheers guys. I'm off to fix my Scottoiler and spotlights. They got a bit wet...







Sorry, the alightment from the bike is a bit unspectacular. Must try harder... Turn up the volume!

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