Hitchcock Enfield beltdrive kit

[Anorak_ian]

Stuart, how have you got on with the grease?

Wow the 46 - 48 tooth engine pully seems a little big, couldn't you have used a smaller pulley so making a belt fit, and then adjusting the gearing by using a bigger gearbox sprocket and smaller back wheel sprocket?

What sprockets are you running at the moment, 19 & 38?

Do you think the grease comes out of your clutch due to using your own centre? I'm a bit conserned about this as I have the same clutch.

[Stuart]

The original grease I'd put on last approx 1000miles before the clutch started to drag. The new stuff as as done about 70 miles locally plus the trip to the Uttoexeter show and back down the m1/A50 route. So not quite at the 1000mile mark yet - but so far so good. I guess it's coming off inside due to centrifugal forces but I have made efforts to seem the aluminium ring that goes on the back of the BNR unit with hylomar to stop if running out there (which it did before). I made this crude stepped rubber washer to go on the inside of the clutch but bottled out fitting it incase it interfered with operation. It's right on the limit as far as thinkness goes. May fit it yet

I did wonder about the grease getting out because of the 'homemade' centre but the dims are pretty well spot on. Could have used or hardened the metal I think as I can see a small groove appearing where the bearings run.

What we really need is a thin, sealed bearing. They do exist for other types of machinery as I saw one a few months ago. Not our exact size though I think which is approx 100mm dia? If I could get one I'd willingly turn out the groove to fit one if I had too. But why don't BNR fit them if they are about We need someone to take a BNR clutch into a good bearing supplier and as them to get measuring. I may do it next time mine is off. Currently debating whether to re-grease it for the Hamm trip if indeed I do take that bike. In theory I shouldn't need to if this new high temp grease is up to the what it says on the can and has the staying power. Time will tell

Yes, the 44 engine cog is a little big but I didn't find it too bad filtering through the M25 traffic for almost 2.5hours in the baking sun the other day. Speed at tickover is a little higher than I'd like but it's arcompromise against top speed with the 4 speed box. I'm happy with it.
If I ever get the 46 press fitted over the body of the turned down 48 (I'm not wasting all that effort on filing out those big inner teeth ) I doubt I'll run it like that. The pull away would just be bearable in normal traffic but not in a worse case senario (M25). I only had it as an option to loose the bearings that sit under my belt and take up the slack (fixed centres).
Originally, I didn't think it was possible to get at the gearbox sprocket without getting the lump out but it was. I couldn't get a bigger sprocket in here because of the width of the carrier assy. I think I have the 18T in there and you can only get it onto and into position by extracting my mainshaft and the holding the sprocket diagonally as you offer it up. Then you have to bring the mainshaft out and through it. Impossible to just push the sprocket straight onto the shaft. No way a 19T will get in there without touching either side of the carrier I think.