Description
- The piston is heat-treated with a T-5 hardening and tempering cycle
- The piston skirt is coated with a high-tech Molybdenum Disulphite coating for faster break in time and increased piston life
- Cast piston is gravity-cast aluminum alloy (not forged) with 18% silicone content
- Big bore piston increases engine’s displacement, torque, and peak horsepower
- Piston kit includes piston, rings, wrist pin and circlips
Fred –
this big bore piston kit noticeably improved my yz125s power and torque the kit was good quality and customer service helped with installation questions but it was pricey
Rusty –
I’m just a casual dirt bike rider but I wanted to give this Piston Kit from Cast Big Bore a try on my YZ125 and overall I’m super happy with it and would totally recommend this product to others it came with everything I needed and was pretty easy to install I could tell right away the quality was really good and after getting it on and taking it out for a test ride I could feel the difference with way more torque and power compared to the stock piston it’s running great with no issues so far and I got faster shipping than expected with everything packaged up nice so nothing got damaged I’m super satisfied and pleasantly surprised with this purchase and would definitely recommend it to anyone looking to get more oomph out of their YZ125 you really get great bang for your buck here two thumbs up
Abe –
This piston kit is awesome, it really opens up my engine with more power and torque than ever before!
Don –
this big bore piston kit for yamaha yz125 bikes is a quality upgrade that definitely adds noticeable torque and power across the rpm range it’s a bit pricey but worth it for riders wanting to get more punch out of their two stroke
Dan –
Man what a cheap piece of junk this piston kit turned out to be, should have known better than to trust some no-name Chinese brand that’ll probably blow my engine after a couple rides.
Donny –
I recently installed this big bore piston kit on my dirtbike and have been very pleased with it, the quality seems excellent for the price and it gave noticeable gains in power across the rpm range which I would enthusiastically recommend to any 2-stroke enthusiast looking for more grunt from their bike.
Colt –
This piston kit seems pretty decent, it increased my bike’s performance so I can shred trails faster now which is rad.