TRX or CRF 450r engine

[socs28]

I'm looking at doing a 450r atc conversion and was wondering the power difference between a TRX 450r with the HRC kit, and the CRF 450r engine. Feedback?

[shortline10]

I recently built a trx450r with and upgraded HRC performance kit and it made ridiculous power , more than I would need . I personally would go that route seeing the trx motor is designed for an atv .

[socs28]

Thanks for the input, my wife has a trx 450r with the kit, great power, I probably should have mentioned that. I am wondering what the real numbers are for a difference. I know stock without the HRC kit in the TRX, the CFR produces a lot more power, but I know the HRC adds a lot to the stock motor.

[350for350]

One more thing to consider, the CRF engine uses a backwards kick to start while the TRX probably uses a forward kick or electric start.