Hardcore Biker
The hayabusa is 1300cc and puts about a little under 200hp.
A 1300cc rotary can put out over 320hp in N/A form.
Has anyone ever stuck MAZDA-made rotary engines in any bike's? I'm not referring to any Crappy NSU rotary engine as they are basically just pistons with a long conrod and unreliable. I know there was one of these made.
A Mazda rotary engine (IMO) would be great to stuff into a bike due to its power/weight ratio.
Last edited by EZAS; 11th December 2006 at 15:27. Reason: plurals are a bitch
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Obey the hosebeast
The 'busa is stock of course. Have a google for modified 'busa outputs, try 400hp or more.
*edit Sorry, I just read NA. I'm not sure what a high-output NA 'busa might do.
frequent infrequenter
if you can fit one into a frame, then go for it!!
I haven't heard of any NA rotaries putting out 320 tho.. tub'd yeah, but NA na.. There's some hugely powered busa's around. Tub'd, lookin up to 500 ponies. NA should see around 300..
Could probably make a drag bike (looking at the length) out of one, but after the motor and all the gear, it'd be pretty big imo for a bike.
There apparently was a company/person who built a smaller rotary for motorbikes tho.. didn't really take off tho
at the end of the day tho, you've still got to try to get that power down thru a contact patch the same size as a tennis ball..
Don Vito
A "1300cc rotary" isn't really 1300cc either...they are considered to be over twice that capacity in racing classes.
...and bungbung's right, modded Busa engines come in well over 400hp, although they are force fed from what I've seen.
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#3
Isn't the Suzuki RE5 a Wankel based rotary engine ? (Same as a Mazda)
I don't think I've seen the internal design of a NSU....pistons and conrods ???
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Rotary's started out in bikes. I don't know what make, but I know they did.Originally Posted by bugjuice
The only rotary bike I know of/can think of at the moment is the Suzuki RE5. Jantar has one.
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Forum whore
Actually the first rotor was a used as a supercharger. I know there is at least one v8 in the 'states that is still running a wankel rotary supercharger.
Has anyone also considered what you would use for a gearbox on a 13b in a bike?
Don Vito
Haha, how about a nice stick shift mounted by the tank?
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Scotsman on a German
Did Norton not stage some sort of comeback in the late eighties/early nineties with the Norton Commander rotary engined bike?
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now where's some dirt!
Yep norton had a rotary too. Can't think of the name of it though. Yamaha was very close to releasing one too, didn't quite come to fruition though.
No8 Wire Extraordinaire
Power to Weight? Haha! A friend has a 12A on her Garage floor & dude they aren’t a light engine! or particularly small. & that is without gearbox.
Do a search & you will find out that rotarys have a checkered history & are also reaal thirsty (Pass anything but a gas station was the old saying) a bit unreliable, bad on emissions & notoriously hard to silence if you want any power out of them.
320 out of a Mazda? Hmm, Maybe in modded form, or one of the late model turbos. In which case PB just did an article on a street legal turbo Busa with 700RWP. Ok that was built for records only, but. . .
On the + side the Rotaries produce a nice power sort of akin to an RZ350. Norton won an IOM but was disqual'd for oversize tank. There was a world of difference between the race bikes & the Commander road bikes. Again noise an issue.
But why would you bother? Far better to make a 2 stroke engine which will kick it seven ways to Sunday if you want power to weight. Large Jetski into bike frame? TulAris Project did that.
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No8 Wire Extraordinaire
ok here we are. Might even go around corners too.
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Forum whore
Wasn't that the 700cc reverse facing twin? Wonder what happened to it?
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Kiwi gone Walkabout
Not to mention Steve Hislop (RIP) taking the win on the Norton Rotary in the OoM TT FI Senior.
http://www.iomtt.com/TTDatabase/Ride...x?ride_id=3723
Brian Crighton
http://www.nortonmotors.co.uk/Rotary%20Racing.htm
Norton Commander
http://www.nortonmotors.co.uk/Bikes.htm
No8 Wire Extraordinaire
oh yeah, maybe I'm confused, I was thinking Steve Spray was disqualled at IOM, er was it Trevor Nation, - see I told you I was confused!
The TulAris was retired a couple of years back after reasonable success.
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