KX500 dirt bike and ENFIELD 5 SPEED

[forhire]

Hi all,

Anyone have any experience or thoughts with using an Enfield 5 speed on a dirt bike? I'm building a KX500 for trail riding using a yanmar l100 clone. Top speed isn't as important as being able to climb. Do able or a dumb idea?

Thanks!

[Stuart]

I doubt it will have quite enough torque for off road work. And a bigger twin will be way too heavy. I might be wrong though.

[forhire]

I suspect your right. I know I'm taking a huge hit on horse power with the diesel. Stock the kx500 runs around 59 hp! My target top speed is only about 30 mph (50 km/h). I'm thinking I'll drop the chain ratio until I get something usable. Maybe a 14 tooth on the output. This would give me a top speed around 35 mph flat out.

[Stuart]

If you were flexible on what egine you used you may succeed. I've heard there are some large singles out there that give possibly 15hp? But again heavy!