Cita
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| posted on 13/7/04 at 03:40 PM |
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chassis
 
Rescued attachment 138-3801_IMG.JPG
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theconrodkid
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| posted on 13/7/04 at 05:09 PM |
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wikid!!!what engine is that? 
who cares who wins
pass the pork pies
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Mark Allanson
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| posted on 13/7/04 at 05:42 PM |
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quote:
Originally posted by theconrodkid
wikid!!!what engine is that?
Rotrax?
If you can keep you head, whilst all others around you are losing theirs, you are not fully aware of the situation
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theconrodkid
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| posted on 13/7/04 at 06:21 PM |
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so what transmission then and where does it get its drive from,look even better with a blade in it
who cares who wins
pass the pork pies
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Cita
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| posted on 13/7/04 at 06:33 PM |
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Honda 500 cc dirt bike engine-50+ HP
Diff from Mercedes 190.
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Fifer
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| posted on 13/7/04 at 07:02 PM |
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I'm abit confused, the engine looks like it's mounted inlet (or exhaust) fore and aft. Surelu the drive is from the side of the gearbox ?.
How is it coupled ?
P S, It's Rotax
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Cita
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| posted on 13/7/04 at 07:11 PM |
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Diff is to be rebuild to take sprocket and chain.
Engine is mounted as it would be on the bike.The carb is not on hence the big hole witch misleadingly can be seen as the exhaust.
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theconrodkid
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| posted on 13/7/04 at 07:12 PM |
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infinit improbibility drive?
who cares who wins
pass the pork pies
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Cita
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| posted on 13/7/04 at 07:16 PM |
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What you mean by "infinite improbibility drive"?
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Peteff
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| posted on 13/7/04 at 07:29 PM |
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Is it a CR500? That's sacrilage breaking one of those to make anything else. They should be preserved for future generations to see how mad the
20th century was and how people had no regard for personal safety, voluntarily hurling themselves into oblivion on these projectiles.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
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theconrodkid
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| posted on 13/7/04 at 07:39 PM |
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cita,infinite improbibility drive was in the hitch hikers guide to the galaxy series,look it up,read the books by douglas adams
who cares who wins
pass the pork pies
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Cita
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| posted on 13/7/04 at 07:42 PM |
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Yep! Honda CR 500
Purchased it some 10 years ago and took it apart for one of my crazy helicopter projects.
Made one ride on that bike and that thing scared the hell out of me.
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Fifer
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| posted on 13/7/04 at 07:54 PM |
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Really confused now, if its from a CR500 it must be an ancient one as it is obviously air cooled. It's not a Rotax then as they are four stroke
in the large cc versions. Yours is a two stroke I assume.
Me thinks you will have much fun with burning clutches due to high revs required due to low torque. But if it works for you, hey, go for it !
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spunky
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 posted on 13/7/04 at 09:07 PM |
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Interesting
I too am a little confused (not difficult)
CR500's were strokers, that certainly looks like a Rotax engine and rotax do make 2 strokes but I dont recall a CR with a rotax. Are you sure
its not from a CCM?
Like the look of the chassis, pretty close to what I'm working on for my next project, But I was going sand rail route.
Reckon you will have drive problems with the engine being gutless below 7K and a very narrow power band.
Also will kicking it into life be practical when you are gonna be stalling a lot.
I love big singles I own a XR650R racer,
personally I would give serious consideration to using a Honda XL650 or Dominator, both have leccy boot.
Or as a great compromise, a Yammy TDM/TRX 850. Really compact parallel twin and comes ready dry sumped.
Interesting project Cita, keep us posted.
John
The reckless man may not live as long......
But the cautious man does not live at all.....
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Cita
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| posted on 14/7/04 at 03:40 AM |
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Two stroke it is from Honda.
I hope that the low weight of the car(should be less than half of a locost)will be gentle on the clutch,if not than i will have to build a lighter car
is'nt it?
Something as a Lotus 18 lookalike
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madforfishing
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| posted on 14/7/04 at 04:16 AM |
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Definitely daring to be different.
After riding motocross for some years I always fancied a motocross engined road bike or a motocross bike made road legal.
This is the first time I've seen a motocross engined car.
CR500 was from back in the day when we had a world champion at THAT sport aswell. Dave Thorpe, I believe.
Cita, at least you didn't chose a CX500, yuk.
Good luck with your project, how did you plan on a starting mechanism ?
I seem to remember there being a 'de-compression lever' fitted on the bars of the bike and a kick start that could break your leg if you
got your timing wrong.
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Cita
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| posted on 14/7/04 at 05:30 AM |
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I am afraid no de-compression mechanism.Kick start can brake your ankle without any problem on these monsters.
Starting will be by means of pushing the car with me in it and two nice blondes pushing
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sgraber
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| posted on 14/7/04 at 09:18 PM |
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OK, back to the chain drive thingy....
I'm trying to picture this: Are you intending to attach a chain sprocket to one side of the diff? Inboard of the inner cv joint? Will this leave
the (now unused) input shaft free-spinning? Will this provide power to the other wheel? Pardon my lack of understanding.
Steve Graber
http://www.grabercars.com/
"Quickness through lightness"
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spunky
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| posted on 14/7/04 at 10:01 PM |
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I assumed Cita will adapt the diff input shaft to accept chain drive (weld a sprocket onto it) Driving one of half shafts will only drive that wheel.
If the prop input was 'locked' the opposing wheel would drive the opposite way.
John
The reckless man may not live as long......
But the cautious man does not live at all.....
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sgraber
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| posted on 14/7/04 at 10:16 PM |
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quote:
Originally posted by spunky
I assumed Cita will adapt the diff input shaft to accept chain drive (weld a sprocket onto it) Driving one of half shafts will only drive that wheel.
If the prop input was 'locked' the opposing wheel would drive the opposite way.
John
Well that's what I thought! But Cita mentioned above that the engine was in place the way it would stay. I have ridden the CR500 (it's a
good ride... ) and the sprocket is on the right side, not facing out the back.... in that configuration it'll never drive the input to the
diff with a chain. Hence the 'Improbability Drive' quote earlier? 
Steve Graber
http://www.grabercars.com/
"Quickness through lightness"
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spunky
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| posted on 14/7/04 at 11:56 PM |
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quote:
Originally posted by sgraber
quote:
Originally posted by spunky
I assumed Cita will adapt the diff input shaft to accept chain drive (weld a sprocket onto it) Driving one of half shafts will only drive that wheel.
If the prop input was 'locked' the opposing wheel would drive the opposite way.
John
Well that's what I thought! But Cita mentioned above that the engine was in place the way it would stay. I have ridden the CR500 (it's a
good ride... ) and the sprocket is on the right side, not facing out the back.... in that configuration it'll never drive the input to the
diff with a chain. Hence the 'Improbability Drive' quote earlier?
Hmmm. Maybe a chain drive to bevel gears
on the input shaft OK maybe not.
Or.... Weld up the dif internals and drive onto the half shaft for a solid axle .......................
Or, hows this? Mount a second dif sideways in front of the rear dif, coupling the 2nd difs output shaft to the rear difs input, and weld up the
opposing output and connect drive chain to 2nd difs input..................
Or.......
Sod it, how you gonna do this Cita if you aint spinning the engine 90degs.
John
The reckless man may not live as long......
But the cautious man does not live at all.....
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theconrodkid
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| posted on 15/7/04 at 06:31 AM |
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thats why i mentioned infinite inprobility drive,just a hot cuppa and a few wires,simple
who cares who wins
pass the pork pies
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MikeRJ
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| posted on 15/7/04 at 08:06 AM |
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Looks pretty obvious to me, if you look at the diff housing it's already had the back (and presumably the front) section chopped off. The
sprocket will be attached to the crown wheel with a chain drive direct to the bike engine, no bevel gears in sight.
The interesting bit will be keeping the diff lubricated...
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spunky
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| posted on 15/7/04 at 08:16 AM |
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quote:
Originally posted by MikeRJ
Looks pretty obvious to me, if you look at the diff housing it's already had the back (and presumably the front) section chopped off. The
sprocket will be attached to the crown wheel with a chain drive direct to the bike engine, no bevel gears in sight.
Mike
Thats really got my interest, lubrication issues aside, has this been done successfully before?
The interesting bit will be keeping the diff lubricated...
The reckless man may not live as long......
But the cautious man does not live at all.....
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Bob C
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| posted on 15/7/04 at 11:41 AM |
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Just a thought - if you bolt a sprocket onto the diff in place of the crownwheel, you can turn the diff round so the 'back' becomes the
'front' and simply remove the pinion & its bearings & stick a cork in the hole! The diff can be upside down, back to front, it
doesn't matter, it will always turn the wheels in the right direction. Without the pinion there are no issues wrt drive direction.
cheers
Bob
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