yamaha man

dyno jet? stoke stroke, stock cylinder based motor.

Ok so what is the most hp u can get out of a stock motor? Im just curious because mine made 82 hp on the dyno. I thought it was pretty good for a stock motor.

Nope started fairly easy. I ran with that setup for about 5 months.

And I think the metal particles are from the piston.

Ran that crank for 2 years and what I meant by piston failure was that half of the bottom part of the piston is gone.. and when i pulled the pipes out of the right side a bunch of metal particles started to fall off.

Ok so this is really odd. My piston blew up on the right side but the crank bearing went out on the left side?? Normally wouldnt it happen on one side? Also what might of caused it, because the jetting was perfect.

Ok so this is really odd. My piston blew up on the right side but the crank bearing went out on the left side?? Normally wouldnt it happen on one side? Also what might of caused it, because the jetting was perfect.

I dont know how im gonna report it.. it already has a huge drag port done to it... btw do they sell cut domes??

will i loose alot of hp if I dont port it?

I forgot to mention my stock crank has a long rod in it....

Ok so my stock crank recently went bad. I was going to upgrade to a 4mill but I was wondering do u have to do any case work or cylinder work??? Oh and Im running stock cylinders.