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post #1 of (permalink) Old 10-03-2001, 11:41 AM
portgrinder
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rotax bike motors? help!

please tell me anything you can about rotax 4-stroke bike motors?
i have heard they have an inline 600 twin?
any inline twins?

we have kind of came to the conclusion we need to solve the problem of haveing a motor revving to 15 grand in a sled. last year we only went to 10.5 grand, so we coudn't get the power out of the gixxer.

so, we need a less rev, more tourque motor. or we have to make our gixxer have power at low rpm by using boost and different cams.

any bright ideas?

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post #2 of (permalink) Old 10-03-2001, 01:08 PM
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Re: rotax bike motors? help!

GO WITH A 1000 GSXR THEY REDLINE AT 11.5, OR A TL1000 MOTOR, THATS A TWIN. OR A 650 TWIN like THE SV MOTOR. ROTAX MAKES MOTORS FOR ATK BIKES. WHAT ABOUT A BANSHEE MOTOR OR OLD RZ350 MOTOR. any large displacement motor or twin will rev less, have you thought about dual staging the turbos, one for low and then one for high like a supra, or how bout one large turbo for mid to high only on a smaller motor like the 650 twin????

post #3 of (permalink) Old 10-04-2001, 03:48 PM
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Re: rotax bike motors? help!

here's my "dim" idea/question... you cant change the gearing, so the rev's will be higher?

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post #4 of (permalink) Old 10-04-2001, 05:12 PM
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Re: rotax bike motors? help!

snomobiles dont have gears they have torque converters, kind like how a polaris works, i sure you could mess with the tension springs and pully sizes(dont know if they call them pulleys or what) but to bring it from 15rpm to 10 would be a major gear change. ??????????

post #5 of (permalink) Old 10-07-2001, 05:05 PM
portgrinder
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Re: rotax bike motors? help!

the thing is that snowmobile clutches lose mucho efficiency past about 9.5 grand and shouldn't really be spun more than 12 grand if you want to keep your left foot shrapnell free.

ya we will most likely turbo the motor we have already and set the rev limiter at about 11-12 grand.

we vant use a gixxer 1000 cus the size limit is 920.

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post #6 of (permalink) Old 10-07-2001, 09:45 PM
 
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Re: rotax bike motors? help!

just make a better clutch!

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