Proposal to delete rule 24.2.1 - Alcohol based fuel or fuel additives are prohibited

[kel]

You lot are no fun, I thought this provocative thread was set up quite nicely

Thanks Husa, you more than made up for the slow start. Hope you didn't lose too much sleep. Until next time

[jasonu]

The gap between the gears is more important than whether it's a 5 or 6 speed

Maybe so but a 5 spd with bigger gaps (than a 6 speed box) between the gears coupled with a peaky power delivery is not a good combination.

[F5 Dave]

And still we struggle to find decent pistons. From time to time I get excited when there is a slight glimmer of hope, but usually it is the 'generic picture' one size fits all website, we have an enormous catalog information that gets you hooked.

Woosner had advertised oversizes for an orphan 1981 YZ80, the picture looks great, the price good, the site seems to indicate you can buy 50.5 & 51mm. Ok might have to change to a Yam rodkit for the 16mm pin.

But c'mon, a one year made 33yr old minibike oversize. What's the chances you will actually get product? or rings? Let alone look like the modern piston in the picture? Why would they stock them? Why would they replenish that stock if they ran out? Vintage racing is old men so 250s, not minibikes.

Everything you find is vintage listings. Suzuki pistons of the 70s & 80s just aren't up to the revs.

[Flettner]

Not that this has anything to do with this thread ( although I am following it ) but how may pistons / cylinders are 100 cc water cooled allowed?

[Flettner]

And how may gears?

[Flettner]

Sooo, same as the old days then. If the gearbox is "manufactured" from scratch it's leagal.
"Specials" are leagal and in fact encouraged then ( like the old days )?

[husaberg]

Thanks Husa, you more than made up for the slow start. Hope you didn't lose too much sleep. Until next time

And yet you insinuate i am the troll.........classic.........

Not that this has anything to do with this thread ( although I am following it ) but how may pistons / cylinders are 100 cc water cooled allowed?

No limit on cylinder numbers.........

And how may gears?

Any.......... as long as it is not based on a Competition engines'ssssssssss

Sooo, same as the old days then. If the gearbox is "manufactured" from scratch it's leagal.
"Specials" are leagal and in fact encouraged then ( like the old days )?

As far as i am aware...........

[Flettner]

just asking, as you were, thanks.

[Yow Ling]

Any.......... as long as it is not based on a Competition engines'ssssssssss

Based or sourced from ? what does based mean ?

here is rule, I know you are famous for the s interpretation, this is just for normal people who dont read rulebook with fervor
24.2 Engines must be derived from non-competition motorcycles. Motocross, Road Racing, Enduro and Go Kart motors and transmission parts are not permitted.

anything you get made is legal

[husaberg]

Based or sourced from ? what does based mean ?

here is rule, I know you are famous for the s interpretation, this is just for normal people who dont read rulebook with fervor
24.2 Engines must be derived from non-competition motorcycles. Motocross, Road Racing, Enduro and Go Kart motors and transmission parts are not permitted.

anything you get made is legal

awe......I couldn't be assed, but i added the SSSSSSSSSSSSSSSSSS'es anyway...Fervor is a excellent description Mike i am zealous
I see there is a transmission company still in CHCH they make reduction boxes but still do one off inc Motorcyles.....
http://www.penfold.co.nz/compover.html

[TZ350]

64mm pistons heaps of choice. 156cc. Nothing to take it to 158 with out changing stroke.

What is the next common piston size after 64mm, what would the capacity be?

[jasonu]

Not that this has anything to do with this thread ( although I am following it ) but how may pistons / cylinders are 100 cc water cooled allowed?

as many as you want

And how may gears?

as many as you want

Sooo, same as the old days then. If the gearbox is "manufactured" from scratch it's leagal.
"Specials" are leagal and in fact encouraged then ( like the old days )?

Correct

[richban]

What is the next common piston size after 64mm, what would the capacity be?

Don't know. If i needed a bigger piston I would just get some made. The Wiseco and JE pistons are too heavy anyway.

[mr bucketracer]

What is the next common piston size after 64mm, what would the capacity be?

most the 600 fours are to big at around 67mm , i did find some at 65.5 . the trouble been the valve cut outs are never right ( to big ) so you end up with steped cut outs which just losses com which is hard enough to get . like rich said get one made somewhere for 500 bucks . if you think 2 stroke pistons are pricey and hard to get think again.

[Grumph]

Don't know. If i needed a bigger piston I would just get some made. The Wiseco and JE pistons are too heavy anyway.

Latest Wiseco FZR600 66mm are actually pretty good. There's enough racing in AHRMA etc that I think they've revisited the dies and a done a lightening session. Pin position is pretty high up too.