Motor choice

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pfleming29
Posts: 24
Joined: Wed Feb 28, 2018 1:59 am

Motor choice

Post by 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
Posts: 73
Joined: Tue Dec 29, 2015 11:42 pm
Location: Sydney Australia

Re: Motor choice

Post by 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
Posts: 493
Joined: Fri Jul 19, 2013 3:28 pm
Location: Ontario, Canada

Re: Motor choice

Post by BrianZ »

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

Brian
pfleming29
Posts: 24
Joined: Wed Feb 28, 2018 1:59 am

Re: Motor choice

Post by pfleming29 »

Alum.
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socalhodaka
Posts: 927
Joined: Fri Jul 19, 2013 10:31 am

Re: Motor choice

Post by 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
Posts: 24
Joined: Wed Feb 28, 2018 1:59 am

Re: Motor choice

Post by pfleming29 »

Thanks for the help.
racerclam
Posts: 588
Joined: Wed Nov 20, 2013 7:01 am

Re: Motor choice

Post by 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
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