smart51
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| posted on 5/1/11 at 02:30 PM |
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R6 engine weight
What does an R6 engine weigh? I'm building a scooter engined 3 wheeler and expect the final weight to be about 220 kg. I've started
thinking that a 600cc engine and an extra wheel can't weigh that much and maybe a single seater could be made to a limit of 300kg. In which
case, it would probably be as fast as my carbed R1 MNR was. It's all just idle speculation of course but would a 600cc bike engine be a
worthwhile amount lighter than the 60kg that my old R1 engine weight (without carbs)?
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matt_gsxr
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| posted on 5/1/11 at 02:41 PM |
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According to wikipedia the dry weight of the whole R1 is 11kg more than the dry weight of the whole R6.
Given that R6 is going to use loads of R1 parts and any differences are only going to be smaller on the R6 (hence lighter) this suggests to me that
the engine can be at best 11kg lighter.
Matt
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smart51
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| posted on 5/1/11 at 03:00 PM |
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That makes sense but it means 300kg would be achieveable if you were prepared to fit ultra light weight wheels and motorcycle brakes etc. Could be an
interesting project.
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Miks15
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| posted on 5/1/11 at 04:10 PM |
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look at formula student cars, these all use R6 engines, im sure one of the unis have published their weights and speeds etc etc.
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MikeCapon
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| posted on 5/1/11 at 05:26 PM |
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Over here there are heaps of what they call 'Cross Cars' and the quickest ones run 600cc bike engines. The class minimum weight is 300kg
and is pretty easily achieved. I'll try and find you a link for one....
ETA Photo. These are off road jobbies run on smoothish dirt circuits
[Edited on 5/1/11 by MikeCapon]
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Yazza54
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| posted on 6/1/11 at 12:14 AM |
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For the sake of another 11kg I'd have the extra 40+ bhp 
I'm unhappy cos I eat and I eat cos I'm unhappy
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carpmart
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| posted on 6/1/11 at 08:04 AM |
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quote:
Originally posted by MikeCapon
Over here there are heaps of what they call 'Cross Cars' and the quickest ones run 600cc bike engines. The class minimum weight is 300kg
and is pretty easily achieved. I'll try and find you a link for one....
ETA Photo. These are off road jobbies run on smoothish dirt circuits
[Edited on 5/1/11 by MikeCapon]
Mike - I've googled but can't find any more detail on these? Can you point me to some information on them, specs, where they race etc
Thanks!
You only live once - make the most of it!
Radical Clubsport, Kwaker motor
'94 MX5 MK1, 1.8
F10 M5 - 600bhp Daily Hack 
Range Rover Sport - Wife's Car
Mercedes A class - Son's Car
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MikeCapon
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| posted on 6/1/11 at 08:49 AM |
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Hi. There's hundreds of these over here. There are three classes.
D3 2CV motors with very strict cost controls on everything
D2 Up to 500cc twin cylinder motors (500CB and 500GpZ are popular)
D1 Up to 600cc. The popular motor was the old PC31 600 CBR but you will find R6s, GSXRs but very few Kawas.
There are lots of championships both regional and a national jobbie.
Lots of chassis are scratch built but there are also a number of constructors. Get your Google 'translate' button ready here.
PRM
FB Racing
Christec
Barracuda
Speed car
Camotos
For some video stick "kart cross video" in Google with the search setting on French language. You'll see that there is all sorts
going on from the agricultural to some very sophisticated kit.
Hope this helps. Shout if you need more.....
Cheers,
Mike
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carpmart
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| posted on 6/1/11 at 09:35 AM |
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Mike
Thank you very much!
It will test my French (moderately good at best) but its great information!
I race in the UK equivalent type of car www.drakart.co.uk hence my interest!
You only live once - make the most of it!
Radical Clubsport, Kwaker motor
'94 MX5 MK1, 1.8
F10 M5 - 600bhp Daily Hack
Range Rover Sport - Wife's Car
Mercedes A class - Son's Car
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BobM
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| posted on 6/1/11 at 09:42 AM |
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quote:
Originally posted by Yazza54For the sake of another 11kg I'd have the extra 40+ bhp
I think it goes a bit beyond this, in anything heavier than a bike, even a 300kg trike, the additional torque of the R1 engine will make a massive
difference to driveability. The modern 600s really are screamers with relatively low torque. An R1 might seem low on torque compared to a 2 litre car
engine but it will be massively better than an R6.
Not very Locost but very BEC
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MikeCapon
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| posted on 6/1/11 at 10:41 AM |
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quote:
Originally posted by carpmart
Mike
Thank you very much!
It will test my French (moderately good at best) but its great information!
I race in the UK equivalent type of car www.drakart.co.uk hence my interest!
You're welcome. I used to make the shocks for a lot of these guys and even once borrowed a PRM for a round of the French national championship
hence my 'inside' knowledge.. The shocks in the photo I posted are mine..
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