OK, here we go first post.

Tomorrow I'm picking up a Sherco 03-290 (first trials bike at the tender age of 44) which has had a new piston fitted as the top end was a bit noisy. So what 2T oil do I use to run it in? Full or semi synthetic or mineral?

Peter

There is a wide range of opinions on this matter.

I run Maxxima K2 at 72 to 1. This is a full synthetic oil.

My advice would be any high quality, name brand recognisable, full synthetic motorcycle 2 stroke oil that you can consistently get and have availability too.

Ask what your dealer reccomends, stocks and runs in his machine.

Probably up for discussion.

I run fully synthetic from new - at 50:1, one year on no rattles, and it's probably one of the harder worked bikes, not because of the terrain, but because of the load

My idea of running in is 3-4 hours really soft riding round, then at least one novice level trial conscious of not reving too much.

When I had my piston done I ran it at 30:1 for the first few hours keeping below half throttle (this is what was recommended to me by the mechanic)

and then after that ran it at 50:1 as recommended on the sherco website

Many thanks for the advice, I'll check with the dealer but fully synthetic and a gental first few hours sounds good to me.

Peter