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I had the same problem once after the carb rebuild. Went and double checked my work and realized I put the float arm on top of the retainer clip on the needle instead of in between the needle and retainer clip...

Who makes a 83.50mm piston? I thought 701 pistons go up to only 83mm max? 760 pistons start at 84mm.

Can't speak for him...I'm just stating my experience with 550 cast iron cylinders in hi performance applications like racing and using dual cooling. Took me a long time to figure this out. I learned that when I leaned out the mixture screws to run really good on the top end it would seize...

Wiseco's recommended clearance is for STOCK engine guidelines...so I'm going to disagree on following Wiseco's spec's for a hi-performance application using dual cooling. This is based off of making power.

If you do run dual cooling on the exhaust manifold, be sure to run no less than .008in piston to wall clearance with Wiseco's and cast iron cylinder. Cold cast iron cylinder and wiseco forged piston don't play well when making power. In my old race skis we run almost .010 with the piston...