Joined Feb 2008
3K Posts | 470+
Outback Steakhouse
You're right about knowing .... about ' soccer ', you support the Saints.
Back on subject now. Sorry
Honda's RC213V Engine
- Thread starter Kropotkin
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- engine honda's rc213v
You're right about knowing .... about ' soccer ', you support the Saints.
Back on subject now. Sorry
How many roadgoing narrow angle V4s are there, and don't the motogp engines of that nature require balancing technology?
If they are homologating something for wsbk it is interesting that they don't seem to regard the L4 thing as a problem, I doubt even honda would be so bloody minded as to put out an L4 just to prove a point.
Joined Jul 2011
1K Posts | 872+
Dont Know
Honda have the narrow angle V4 in the VFR800 and 1200. The Aprilia V4 is about 75 degree. KTM twins are 75 degree with balancers. Have to go back to the 2006 Honda VTR1000/SP2/RC51 to find the last 90 degree V, but that was a twin.
Joined Jun 2007
10K Posts | 1K+
Norah Head
Balancers are not the problem. As far as I know there is no way to cancel gyroscopic forces, that's the problem.
Matter of fact whomsover does work out how to cancel them will be known as "the saviour of mankind" and will be snapped up by some space agency, cost he/she will have worked out how to defy gravity and we can travel through space on a toothpick.
In the RC51 they mounted the engine in a much different position compared to the Ducati, they also needed special radiators because of clearance issues with the front tire. On the production bikes they used side mounted radiators and the bike was a heavy ......., but fun to ride. The RC30 and 45 both used 90 engines but Honda chose the 90 because of $$$ as they wanted to use the fxx engine that gave birth to their GP engines.
Joined Jul 2011
1K Posts | 872+
Dont Know
Compact with a capital V!
http://www.totalmotorcycle.com/photos/2009models/2009-Aprilia-V4-RaceMachineEngine.htm
My not very informed point was that honda may not want to put out a production engine now with balance shafts etc. Rather destroyed by the existing aprilia V4 which I had forgotten about.
Well barry as a scientist you should be pleased, because there now appear to be 2 independent and fairly serious attempts to test your hypothesis concerning gyroscopic and other effects of the L4 engine configuration on vibration and handling, the hypothesis not necessarily being without merit in my inexpert opinion.
Ducati corse would appear to be trying to solve their bike problems by chassis re-design +/- engine re-positioning without ditching the L4 engine; first impressions were positive with the bike looking much better and able to be ridden in a conventional manner at a competitive pace, albeit with jumkie's caveats that the pace may not have been as competitive if normal circumstances, and in particular the involvement of the 2 factory honda riders, had applied.
It would also appear that honda, with the odd engineer in their employ with a passable record for engine design (which doesn't preclude them being wrong in this instance of course), are going L4 for at least a road bike and possible a wsbk.
Joined Jul 2011
1K Posts | 872+
Dont Know
I think a true L4 means the engine is layed forward, which Ducati changed when they rolled it back in the alloy chasis, so now it is really a 90 degree V4 not L4. Dont understand much about gyro forces, last I heard of it was when Gardner and Doohan complained the single crank NSR500 wouldnt turn in without a struggle, ie understeer. The Yamaha and Suzuki employed counter rotating cranks which cancelled the forces and they supposedly handled much better. The big bang Honda engine then trumped them all with much better exit grip, though Doohan still said while stable the Honda was never actually nimble.
I did some serious research, namely googled and found Honda still make the 90 degree V4 in the VFR800, which traces lineage back to the RC45. They may well want to continue this for the road bike. Only the newer VFR1200 V4 is a 76 degree V.
VFR800:
I have this. Yeah!!
But I wouldnt mind that.......................
What is that Bird (the top one).
That is an awesome looking Desmo. That is a serious fan to take an expensive collectors bike and do a tribute paint job.
Nice bike though, and something about fast bikes always look better with a girl taking off a bikini
: )
Joined Apr 2011
636 Posts | 26+
Gold Coast
u should have seen the desmosedici owners day at donington nuts. half the bikes there nearly made u lose your lunch, they looked nothing like their $100,000 price tag!
Joined Feb 2009
3K Posts | 2+
siebenbürgen süße heimat!
Joined Jul 2011
1K Posts | 872+
Dont Know
I have this. Yeah!!
That engine must be nuts in a motard!
I'm old, so I got an old one of these:
On one of these:
and one of these:
On one of these:
But I would quite like one of these:
Never happen - too much money reinvesting in the business
I have a friend that has an RSV4 Factory with a bunch of superbike-level bits (cam drive, exhaust, ECU) and a Desmosedici RR with a slight hot-up from stock. If I was a better rider I am sure I would get more out of the $85,000 Ducati but the Aprilia is eyeball-popping. Just as well it has anti-wheelie!
But nothing on the road sounds like the RR.
Joined Feb 2009
3K Posts | 2+
siebenbürgen süße heimat!
500cc v2 in a rs125 chassis?
heard about that, must be the perfect bike for the roads.
i really hope ktm will finally do a rc4 ,or cagiva finally put the 500cc husqvarna single in their mito.
wtf is up with cagiva anyways?
heard about that, must be the perfect bike for the roads.
i really hope ktm will finally do a rc4 ,or cagiva finally put the 500cc husqvarna single in their mito.
wtf is up with cagiva anyways?
The RS125 chassis is probably not as good as the RS250 - that was a V2 in the original road bike. From memory, the RS125 is built very small and light. Not much meat for taking big torque and braking forces. Whereas the RS250 is a great chassis - very strong, GP-level brake mounts, etc.
The RS125 would only make a good ride if it was for a Pedrosa-sized rider
Cagiva make a 525 single Mito - that and the Raptor 125 seems to be the only thing they are making nowadays...
The RS125 would only make a good ride if it was for a Pedrosa-sized rider
Cagiva make a 525 single Mito - that and the Raptor 125 seems to be the only thing they are making nowadays...
