Wiseco Piston Kit 11:1

[beastlywarrior228]

the wiseco 11-1 is great and I highly recommend it

 

[yamaharider]

Well it's at 4 thousandths of an inch right now...And i haven't honed/bored it yet so it's a bore. Now what should i bump it up to? 353 or a 357. I really don't want to go all the way to a 366 just because if i do have to hone/bore it again i don't want to have to put a new sleeve in.

 

[lbjamm]

Depends how much it takes to clean up the jug.

 

[Gen1Pat]

You'll have to get it mic'd to see if it is too out of round to be taken 0.020" over, or if it has to go 0.040". If it's stock bore, I just usually punch it the full forty.

 

[yamaharider]

Ok. Thank you everybody for all the replies. I just ordered a .040" over piston at 11:1. Hopefully everything works out!

 

[yamaharider]

So i ordered the piston yesterday and i got the price to bore out the cylinder. Now the guy doing the machining asked me how big the piston that i was putting in there and i told it's an 84mm piston. or .040" over standard bore. But my main question is that should i wait to get my piston then tell him to go a few thousandths over the diameter of the piston? Or would he know what to do. I've never bored a motor before so this is very new to me. I still have the cylinder because i want to wait till i get the piston.

 

[lbjamm]

I'd wait and let him match the jug to the piston. A good machinist knows what to do.

 

[yamaharider]

Ok thanks Ibjamm

 

[Gen1Pat]

Always give the piston to the machinest so they can match the bore to the piston precisely.