Description
If you’re running a KTM 500 EXC and want to extract meaningful gains in combustion efficiency and throttle response, a high-compression piston upgrade is one of the most direct paths forward. The Wiseco 40131M09500 delivers a 12.5:1 compression ratio in a package engineered to tight tolerances, ensuring reliable performance whether you’re hammering trail sections or pushing hard on the track. This is a straightforward bolt-on refresh that pays dividends in both power and durability.
- 95mm bore diameter – KTM 500 EXC specific
- 12.5:1 compression ratio – increased horsepower
- High-silicon aluminum alloy – aerospace-grade material
- CNC-machined precision – exact tolerances
- Heat-resistant construction – extreme conditions rated
- Complete installation kit – all components included
- 2012–2016 KTM 500 EXC – OEM fitment
- MPN: 40131M09500
