Aha. That makes a difference. So in theory the barrel is 0.010" over, which is a little on the high side. It might smoke a bit. However, you need to measure your piston carefully at right angles to the gudgeon (wrist?) pin to get the actual clearance, but if you might want to give it a run or two at Bonneville, 0.010" might be OK to prevent it from seizing! LOL.
I get the impression you are in the good 'ole USA with your Wisconsin piston?
There is a company in the UK, F.W Thornton 01952 252892. Email ENQUIRIES@FWTHORNTON.CO.UK
I understand they have the 493cc OHV Sloper piston in stock. Hepolite Part No. 2687. Apparently these are newly made in Australia, and have 2 compression rings and 1 oil control ring. However I don't know if the control ring is at the top or bottom. If it's at the top, you're laughing, because all you'll need is a rebore.
They stock Std, +0.020 and + 0.060. The compression height is 1 1/2" and the gudgeon pin is 3/4" dia.
They also stock liners. The piston will be quite expensive, but what price Fun?
Hope this helps. Let us know how you get on.
I get the impression you are in the good 'ole USA with your Wisconsin piston?
There is a company in the UK, F.W Thornton 01952 252892. Email ENQUIRIES@FWTHORNTON.CO.UK
I understand they have the 493cc OHV Sloper piston in stock. Hepolite Part No. 2687. Apparently these are newly made in Australia, and have 2 compression rings and 1 oil control ring. However I don't know if the control ring is at the top or bottom. If it's at the top, you're laughing, because all you'll need is a rebore.
They stock Std, +0.020 and + 0.060. The compression height is 1 1/2" and the gudgeon pin is 3/4" dia.
They also stock liners. The piston will be quite expensive, but what price Fun?
Hope this helps. Let us know how you get on.