Ozzy27 F3 Race bike

[CHOPPA]

Has there been a race or trackday that i have missed recently...?

[quallman1234]

Sounds like a SV650 mixed for a 600 SS

[Ozzy27]

Has there been a race or trackday that i have missed recently...?

You will be amazed what goes on at manfield on friday test days all through out the year.
Only 5 bikes on track so heaps of space last friday.
this week 30+?? 2 clear laps in a row? yeah right!

[CHOPPA]

Gay i shoulda checked the website! Taupo is like that as well, been there for a couple of weds test rides only 3 bikes on the track its great!

[steveyb]

I know, oh oh oh, its a..........

Well, that info will cost you a lot more than one beer.

Idea is not so new, but Ozzy is the first bonehead to actually do it and make it work. All power to 'im. A lot to be said for actually getting on with it and doing it. I think there will be significant discussion around this one.

The bike is sweet. The susp work is the best. The rider, weeeeelllllll that is another story. Will be interesting to see said bike up against existing racebikes.

Enjoy
;-)

[Ozzy27]

I know, oh oh oh, its a..........

Well, that info will cost you a lot more than one beer.

Idea is not so new, but Ozzy is the first bonehead to actually do it and make it work. All power to 'im. A lot to be said for actually getting on with it and doing it. I think there will be significant discussion around this one.

The bike is sweet. The susp work is the best. The rider, weeeeelllllll that is another story. Will be interesting to see said bike up against existing racebikes.

Enjoy
;-)

Chris, you have built a fantastic sounding race bike mate, it sounds AWSOME!

I believe what you have done, has created a way for people to end up racing a lot better quality base product bike, than a lot are currently racing a lot of 2005 bikes can now get out there and be competitive ib the F3 class, LONG LIVE THE KIWI TINKERER

Current/modern tyre sizes, quality brakes, and quality base suspension product to work with

PS- The mods You have done to the High speed Rebound on the front forks, is Bloody Brilliant mate, turn 2 is realy quite bad for the high speed side of rebound at manfeild, and your bike just flowed through that turn with me on it, I was not going very fast, but fast enough to give you a big thumbs up on your front suspension work

Well The 450 has completed its first race weekend without any problems at all!
With a rusty over weight rider on board it smoked every 400 it came across on the straights and was a match for almost all of the SV650's. This is with a stock 600 engine running only 3 Cylinders giving the 450 capacity.
I belive I can get 15 more horsepower from the engine without too much trouble(just some money).
As it was it allowed me to finish 3rd in F3 in the 20 lap race on Sunday morning.
The bike is great to ride and very easy.
I would be happy to talk to anyone interested in a similar bike as I could do a simlar bike from any fuel injected 600.
There will be an article from Glen Williams on the bike in next months BRM.

Cheers all.
Chris (Ozzy)

[Deano]

Ummm, I have to vouch for Chris and his 'exotic' machine.

I pulled up beside you on the dummy grid for qualifying - heard this bike which sounded like a twin, sort of a pulsing twin, but not quite.

I asked you what it was, and thought from the stickers that it was a hotted up GSXR400.

But no.

You came past me mid race and I couldn't quite match your pace - you had some nice style through Higgins. I should have tried harder to tag onto you cause I need to lift my game a second or two per lap. I was quite relieved that you were in F3, and not in my class.

How much HP is that thing putting out anyway ?
Do you think it will be reliable long term given any slight misbalancing with no firing on one of the cylinders ? Certainly has the suspension and brakes.....

[roogazza]

Well The 450 has completed its first race weekend without any problems at all!
With a rusty over weight rider on board it smoked every 400 it came across on the straights and was a match for almost all of the SV650's. This is with a stock 600 engine running only 3 Cylinders giving the 450 capacity.
The bike is great to ride and very easy.
I would be happy to talk to anyone interested in a similar bike as I could do a simlar bike from any fuel injected 600.
There will be an article from Glen Williams on the bike in next months BRM.
Cheers all.
Chris (Ozzy)

Thanks for taking the time out to chat to me on Sat, very interesting project. Gaz.

[Ozzy27]

Ummm, I have to vouch for Chris and his 'exotic' machine.

I pulled up beside you on the dummy grid for qualifying - heard this bike which sounded like a twin, sort of a pulsing twin, but not quite.

I asked you what it was, and thought from the stickers that it was a hotted up GSXR400.

But no.

You came past me mid race and I couldn't quite match your pace - you had some nice style through Higgins. I should have tried harder to tag onto you cause I need to lift my game a second or two per lap. I was quite relieved that you were in F3, and not in my class.

How much HP is that thing putting out anyway ?
Do you think it will be reliable long term given any slight misbalancing with no firing on one of the cylinders ? Certainly has the suspension and brakes.....

As the engine is at the moment I think it would be more reliable than a 600 as it doesn't quite rev as hard.
It is very smooth and if you do a bit of reading on engine vibration the combustion doesnt add to vibration. As this engine is still running the 4th piston the engine is still dynamically balanced. The bike still has stock road bike forks which seem to work ok at the speed I am going but may be found wanting going a lot faster.

[Deano]

That's wicked mate. I'm no mechanic like you - looks like your onto a winner. Long live the Burt Munro, can do kiwi attitude of lateral thinking !!

[Chrislost]

well a stock GSXR has better forks than a 650 commuting twin anyhow.

and im sure that 15 odd years of development over most of the 400s that are racing means better suspension than them!


That thing sounded cool! mind you i only heard it for about 10 seconds during the race...

[gav]

So if its running its 4th piston, but only firing on 3 cylinders, isnt still effectively a 600cc bike if you measure bore and stroke on four cylinders?
A 600cc bike running on 3 cylinders?

How would the engine size be checked and confirmed?
10-15 The Formulae to Calculate Cubic Capacity:
10-15-1 Reciprocating piston motors: Diameter of cylinder bore in centimetres, squared,
multiplied by 0.7854, multiplied by stroke in centimetres, multiplied by number of
cylinders.

It sounds a wonderful idea but may cause some scratching of heads come tech time?

[lostinflyz]

So if its running its 4th piston, but only firing on 3 cylinders, isnt still effectively a 600cc bike if you measure bore and stroke on four cylinders?
A 600cc bike running on 3 cylinders?

not really. the final cylinder is acting basically as a balancing member and technically draws power from the motor so all good. but more than likely eventually someone will bitch.

someone always bitches.

Anyway good on ya ozzy sounds like it could be a real f3 weapon. how much would you guesstimate it'd cost to do another conversion, just wondering???

[Ozzy27]

So if its running its 4th piston, but only firing on 3 cylinders, isnt still effectively a 600cc bike if you measure bore and stroke on four cylinders?
A 600cc bike running on 3 cylinders?

How would the engine size be checked and confirmed?
10-15 The Formulae to Calculate Cubic Capacity:
10-15-1 Reciprocating piston motors: Diameter of cylinder bore in centimetres, squared,
multiplied by 0.7854, multiplied by stroke in centimetres, multiplied by number of
cylinders.

It sounds a wonderful idea but may cause some scratching of heads come tech time?

I Have spoken to MNZ waiting for conformation but inital feedback is that with no valves in the head it will be classified as a balance weight. Which is what it is. A four stroke engine must have an induction compression,power and exhaust strokes by definition. without valves none of these occur. therefore that cylinder can not be call an engine!! and a 600 is really 4x 150cc engines.
so now it is 3 x 150cc engines. It is like saying the Ducati supermono was a 1000cc engine because that was what it was once.

[Ozzy27]

not really. the final cylinder is acting basically as a balancing member and technically draws power from the motor so all good. but more than likely eventually someone will bitch.

someone always bitches.

Anyway good on ya ozzy sounds like it could be a real f3 weapon. how much would you guesstimate it'd cost to do another conversion, just wondering???

Hi,
Yes you are right it does draw power from the engine. From my calcs about 8.5hp is used to drive that cylinder.
As for doing another one about $900-$1000 + gaskets and other parts depending on the bike.
Cheers
Chris