- Joined
- Nov 26, 2009
- Messages
- 3,095
For anyone using BSA tappets in their Nortons (as introduced in the 1970s on some Commando engined dirt track racers).
New tappets can have a sharp edge that should be polished/rounded off to avoid wearing against the tappet block (not a problem with used tappets).
The outside corners should be chamfered to clear the lifter tunnel.
New tappets can have a sharp edge that should be polished/rounded off to avoid wearing against the tappet block (not a problem with used tappets).
The outside corners should be chamfered to clear the lifter tunnel.