4 Cyl 1.8L Yamaha SHO 90, 115 Nizpro Tune (2015-Present)

With the Nizpro performance tune, factory 90-horsepower Yamaha SHO engines can increase to 123hp, and factory 115-horsepower Yamaha SHO engines are bumped up to 152hp. The caveat here is that Nizpro has measured the factory outputs of the 90 and 115 at 108hp and 141hp respectively. Reviewing the dynographs, most of the gains aren't realized until the very top of the rev range.

The 90 gains slight low-end torque, then horsepower gains come into effect as you approach 5000rpm. This should marginally improve your on-plane time, and possibly boost top speeds by 2-5mph depending on your setup. Of course fuel economy improvements will be there too.

The 115 effectively gains 9 horsepower at the top of the rev range, so most customers don't report favorable power gains. Where their improvements are seen is mainly in fuel economy.

NOTE: To achieve optimal performance, your engine must run on minimum 89-90 USA grade / 95-98 AUS grade octane fuel and adhere to recommended service intervals. Failure to do so may result in decreased performance and could potentially damage your engine.

** Multi-engine orders: Free overnight return shipping automatically applied at checkout **