Was wondering if anyone can help me on which way to go with this overbore. I would like to know which size people have the best luck with and could someone point me where to start with my re jet? Thanks so much guys

Ebay piston kits new with rings piston clips and wristpin 96mm is only 120 shipped 95 and 97 are a bit more like 140

I went with the 95mm on my build, and I added a Stage 1 cam and did some clean up work on the cylinder head ports.  I went with the 95mm as my riding is mostly back roads in 3-4 gear, and at speeds around 45mph....and I wanted to be somewhat gentle on the clutch and belt drive.  The engine runs really well, gets good mileage and has a noticeable power increase over stock.  It ran fine with the stock carb and air cleaner, and a DYNA muffler.

According to this computer...the HP increase based on the stock 30 HP, stock 8.5/1 compression ration and increase to 10.5/1 compression is only 2 HP.  I sure think it feels like a bigger increase.

http://www.bgsoflex.com/cgi-bin/crchange.cgi?hp=30&oldcr=8.5&newcr=10.5

Going from 95mm to 96mm adds another couple of HP and some torque, and the change to the 97mm adds a couple more HP and more torque.  

If you are going to make the change to a piston....you really should do the cam as well.  It will bump the HP up considerably.

Next time...I most likely will try the 97mm just for kicks!