Go make some combustion with that!

Now don't go drilling any holes in that Armen!  

Actually, I remember drilling "oiling" holes in the skirts in some Wiseco pistons for my old RM125, so...  

Dave wrote on 05/10/21 at 17:00:43:




Well okie dokie

I got myk new 97MM from Lancer in the mail yesterday and it looks great.....now what to do?

I currently have a WISECO 95mm installed with a fancy Silicone Carbide impregnated cylinder done by Boretech.  The engine runs great, there are no oil leaks, no funny noises - so far it has gone 12,000 miles with the normal oil changes and a bit of tinkering:  I added a mid weight flywheel and then later a super light flywheel, I modified the chain tensioner so it no longer has a ratchet and is manually adjusted by adding spacers, I changed the Stage 1 cam to a Stage 3.  With the double Kawasaki pulley modification it turns 3,500 rpm at 60mph and 4,000 at 70mph.....it can run all day at freeway speeds and not get tired (but I do).

On the majority of my local rides I rarely use more than 1/3rd throttle for assaulting the county roads - the speeds are below 60mph on the straights and the fun comes from the frequent curves.

I kind of hate to take apart an engine that runs so well - but the new piston design is likey to make things even better!

Over the course of a rainy weekend I could hide in the garage and get the 97mm piston swap and the DragBikeMike inspired DR650 clutch mods completed.  So.......I guess I better make sure I have the needed gaskets in stock!

DragBikeMike:

That is a bit of an unknown for me at this point - after your leaky oil experience with copper I was tempted to try a stock head gasket.  I suppose I could take my cylinder head and cylinder to a machine shop an have them take a tiny cut just to be sure the mating surfaces are flat.

I have a bit of time to ruminate about this.....the bike won't likely be coming apart until after we go to Suches, Georgia next week.