21T engine sprocket

Try contacting George Cohen, he knows a great deal about the older singles. If the drive side main shaft on the OHC models is the same as the SV and OHV models, perhaps a sprocket for the inter can be obtained through RGM, they offer engine sprockets of up to 23 teeth in all of the various offsets.

Ken McIntosh lists them.

http://manxnorton.co.nz/catalogue/catalogue.jsp?m_id=2&c_id=18

Previously wrote:

I got a sprocket from RGM but unfortunately the taper up the middle is a completely different size, they have been very helpful and I sent them my old one as a sample. However they don't have any sprockets of the right type. Does anyone know where else I cold to looking for an Inter sprocket?

RGM have said they could have a batch made but it will take several months, seems a bit long winded if someone else is already selling them.

andy....i,ve just had a 21 tooth sprocket for my dollshead gearbox made by john hemmings.you can only buy 19th for early gearbox,s

so i sent my sprocket to him and he welded on a blank then re,cut the teeth,you can get his details from in the old bike mart.

I once resorted to turning all of the old teeth off the existing sprocket and welding a 21 tooth sprocket blank, (with the hole bored out accordingly of course!)into place. I got the sprocket plate from a bearing stockists and was told the sprocket plate is heat treatable to harden the sprocket teeth. It worked nicely.