The E-Tech 135 HO is a wolf disguised as a sheep. In reality the 135 HO is the exact same motor size,weight and dimensions as the 150 HO it is just detuned to make less horsepower. All HO models are tuned to push the 10% max horsepower rule. The 150 HO will make right at 165 hp and the 135 HO will make right at 148 hp hence the reason I say it is a wolf disguised as a sheep.