If you want to climb rocky mountain grades without pedaling, you're probably not going to have much top "cruising speed". You might want the 4 stroke and use the smaller roller in the kit. You should be able to go faster downhills by picking up the drive roller off the tire.
Video of riders on 4stroke titans driving in Utah hills and moutains.
videographer comment: grabir01 2 years ago
Engine is a TITAN XC50 4 stroke. Roller size is 1.25 inch. Friction drive sold and made by DAX and can be found at thatsdax.com fro around 129 bucks. Also. I did no pedalling at all. Enjoy the ride..