So its off to Bungay you go then John - or Beccles, if your name is Len and you get it a bit wrong................
Luckily John i found a good output gear and mainshaft sliding gear in my Burman spares box, a new sprocket is on it's way too..So its off to Bungay you go then John - or Beccles, if your name is Len and you get it a bit wrong................
I knew that this is a critical place requiring a good fit for avoiding wear and any troubles that go with it. So a few months ago I did a LOT of laser welding at my former company on most of the splines in the Rap gearboxes - doing two of them parallel. BIG SNIP..
I could have had new spares from the Spares Co. but honestly I don´t have much confidence in getting that sort of fit I´d like to see - for that money.
A lot of early Burman chainwheels had rubber bushes in them to soften the take up when the clutch is released..My brother-in-laws 250 OK Supreme had them,or should I say did not have them just bolts with 3/4" slop..all the parts were bought from Draganfly motorcycles. It made the hand changes a lot nicer..JohnI am no A expert but it was pointed out to me recently that A box clutches had rubber bushes to reduce the harshness of the drive which brings be me back to the Norton vane clutch perhaps this sprocket hammering was an additional fault of not having the cushion
I am no A expert but it was pointed out to me recently that A box clutches had rubber bushes to reduce the harshness of the drive which brings be me back to the Norton vane clutch perhaps this sprocket hammering was an additional fault of not having the cushion
Hi Martyn - I have gone through 2 Burman gearbox sprockets , just as you describe ( I have done 40,000 miles on the Comet) - both times have left me at opposite ends of the country (Ireland) .Fortunately it hasn't happened on any of our longer trips abroad! . Anyway, I am preparing the Comet for this years international , and I was wondering if there is any way to check the sprocket for "rocking" on the splines without having to strip out the primary side ? The most recent sprocket was a very tight fit , and has about 2,000 miles on it. I cant see any way to avoid taking the primary side off, but its worth asking.With the first to go I suspect that it was of inferior quality - the latter ones were of high quality and cost! I suspect that on a single there is more 'shock' on the primary chain than on a twin - plus we all know how well the ESA does (not) work - and that translates to impact loading on the drive gear splines.
So now at every chance I get I am checking that retaining nut - though there is no way I would go more than 5,000 miles without checking it.
M