Motor choice

[pfleming29]

If you had a choice between a super rat or a road toad motor. Which motor has the most potential for mx racing. If course modifying it.

Thank you

[Jack Elliott]

interesting question.A late model (alumiferric) Super rat engine would surely be the best. If comparing cast iron 100cc cylinders would think Super rat would have a more MX peakier high exhaust port type set up but only guessing.Look forward to people that know chiming in on this

[BrianZ]

Which Super Rat, the early cast iron cylinder or late aluminum cylinder?

Brian

[pfleming29]

Alum.

[socalhodaka]

Well I would think the fact the name Super Rat and not Road Rat would be the first clue. One bike was made for racing and the other was not.

[pfleming29]

Thanks for the help.

[racerclam]

the Rat engine would be best, the only cylinder difference is the rat has a 3mm higher exaust port , but the toad has mor flexability because of its stating point. But same potential . The toad has a wide ratio trans the rat close ratio. Toad has primary kick thst enables starting with clutch pullid in. BUT! has a weaker primary gears and no option to use cushion straight cut gears. Toad had needle bearings instead of the clutch steel bushing ( one plus ) . I would use the rat. THe early Rat iron cylinder does not have the same HP potential as the later also cooling is poor.

Rich