Hi bonny,
Sorry I have only just seen your reply,
The TWN belongs to a friend and it didnt sell, neither did the guzzi stornello or the honda trials
As you said a bit of a strange do???
I thought the BSA S25? 500cc flattanker was a good buy at 5k
Regarding the Suzuki conversion, it will be a while before I get onto these even though I will need 2 before very long
If you can get your hands on a 2000 onwards GS500/550 clutch (I got a couple on ebay for less than £50 each)
The late Suzuki clutch has a 6 spline centre, 20x 16 x 4mm, Then if you have or can get a plunger BSA A7/10 gearbox mainshaft it has 6 splines on the clutch end, 13/16 x 11/16 x 3/16in (app 21 x17 x 4.7mm) its so close its begging to go on
Do you have access to a slotting machine ???? ????
You will need to turn up a piece or two to fit a bearing to the chain wheel and to seal the gap in the sliding plate
If you are stuck with the tapered BSA shaft, I think the GSXR750 (c1990?) type clutch will be better this has a steel splined piece casti nto the centre, you will need to bore and spline this to suit the BSA 4 spring clutch centre and then an R22 bearing 1 3/8 x 2.5 x 3/8in, (scarce and expensive!!) It may be possible to fit the bearing outer race from the 4 spring chainwheel?? I havnt tried!!!
The 43 tooth sprocket is available from Sprockets Unlimited in Steel or Dural,
Drill out the 3 rivits on the Suzi clutch to separate the alloy basket from the gearwheel, this will then need attaching to the new sprocket!!
I think thats enough homework for today
Cheers
John O R
PS I have some pics of the Pearson clutch I can send you if you send me a PM