i used RK 420ho o ring chain 132 links and cut to fit as i have
non stock rear sprocket place on bike to size do not use old chain
to measure as that is good way to get it wrong
master link is a beast to hook up but my first time with a chain
always had bmw with a drive shaft for 35 years
6400 to 13900miles and doing ok and must admit have been a bit lax about spraying oil on it and adjustments
try phil at bsa for a proper fit and new sprockets or
i think burwins in london has mz spairs
ar dave
i get sprockets from bikeworks manyard mass usa and chain from local
atv shop chain was $76usd in spring of 2004
ps the ori chain and sprockets was trash at 5000 miles and i put 1400 miles on it befor i could get sprockets about 80usd and chain about 76 usd
boy do i like shaft drive