I installed this on a stock DR-Z 110 engine and this is my review.

Pros: Awesome up grade, look good and made from high quality materials. works with a stock piston and head. adds more power with the longer stroke.

Cons:
It will not work with a stock jug do to the length of the cylinder. I had to remove about 3/16" from the bottom of my jug and redo the angle for a stock out come.

I would recommend this product to anyone looking to upgrade their older DR-Z/KLX-110 to a newer style crank and came gear.

Thank You TBolt for your great product line. Awesome to do business with your team and I will be returning for more.