Chains and sprockets for Gen 1

[ghostbiker]

That's the OE yam front sprocket. I would never recommend changing just the front on a worn set.
Front wears faster than chain and rear. I just changed mine and rear looked good and chain in spec but front worn out with slight hooking and thinning teeth.
Allways use a new washer when replacing and I would allways replace as a set.

Oe front sprocket is about 30-35 quid I think, a jt or sim is about 12.