I'm assuming yours is a BF1 and As a comparison, My BF1 has 155,000kms with 382rwkw on stock unopened engine mate. I do however believe mine got the BF mkII upgrade internals... I'm having no issues with it in those regards, it seems to be happy in the 300's. I also do not drive Miss Daisy around... It gets a good work out. If you're happy with say 350 power mark, it will go all day with a safe tune "IMO"