Formula 5 question?

[TZ350]

It would be the fuel one? why?
http://www.mnz.co.nz/competitionrules.aspx
Appendix E oxygenates.

The bucket rules must be talking about Alcohol fuel additives only as they also refer to 10.17.1 which says that FIM equivalent is OK for solo road racing ....



And FIM allows for 2.7% oxygenates by mass.

The way I read it, you can dissolve enough air into the fuel to get 2.7% by mass of oxygen into unleaded and be legal.

[jasonu]

The way I read it, you can dissolve enough air into the fuel to get 2.7% by mass of oxygen into unleaded and be legal.

But who would officially and properly police it? (in a self policeing class)

[husaberg]

The bucket rules must be talking about Alcohol fuel additives only as they also refer to 10.17.1 which says that FIM equivalent is OK for solo road racing ....



And FIM allows for 2.7% oxygenates by mass.

The way I read it, you can dissolve enough air into the fuel to get 2.7% by mass of oxygen into unleaded and be legal.

That's the way i read it. but, they will already be close to that if not that already. ie from vibration and the stuff already in it. So you may be out of luck.


If not it can be our secret.

[TZ350]

But who would officially and properly police it? (in a self policeing class)

... bugger

It will be easy to see who has over cooked it ....

[husaberg]

But who would officially and properly police it? (in a self policeing class)

Good point I hear Yamaha R1's might well be legal now. I might be in with a chance with one of them. Until someone else gets one.

Police is a good anology as they seem to be mainly used as a revenue gathering tool now. sounds familiar. Although they do (The police rather than the MNZ)seem to at least police the rules.

[jasonu]

You will be able to tell those that have over done it, they will be the ...

...ones suddenly doing all the winning.

[Bert]

A can of worms I see.... maybe I shouldn't have started this conversation.

That will teach me for waking up early on a Saturday with out a hangover and posting something stupid..

[husaberg]

A can of worms I see.... maybe I shouldn't have started this conversation.

Heya,

Yes I do still look at the buckets even though I don't do it anymore...

Got a question...has anyone done a competitive four-stroke F5 bike?
I assume a good base would be an XL-100S (as the limit is 104cc) and ...ahem,..XR-100 parts are fairly easy to find (I would say they're identical internally).

Just,...ummm....curious...

It's amazing what has come out of this thread after my original O/P of 100cc four-strokes

F5 anyone i hear thats what this thread was about. Any one got a xl100s crf100 xr100 xr75 could make a good fun f5

[Henk]

F5 anyone i hear thats what this thread was about. Any one got a xl100s crf100 xr100 xr75 could make a good fun f5

Strangely enough in the past year there have been four bikes built up here running small Honda four strokes and one that I know of that will hopefully be finished in the next couple of months. Some are definite works in progress and some go quite well. F5 is a blast and in Auckland seems to be the way to get completely new riders started without having to deal with big fields and some quite fast guys on fast bikes. They aren't competitive with the quick two strokes but there are starting to be enough of them that the mid field battles are becoming interesting.

[husaberg]

Strangely enough in the past year there have been four bikes built up here running small Honda four strokes and one that I know of that will hopefully be finished in the next couple of months. Some are definite works in progress and some go quite well. F5 is a blast and in Auckland seems to be the way to get completely new riders started without having to deal with big fields and some quite fast guys on fast bikes. They aren't competitive with the quick two strokes but there are starting to be enough of them that the mid field battles are becoming interesting.

Are they the XR100 style motor or the small bore ie cb100 125 style motor?

[Henk]

Some of both. The xr style seems the better bet, smaller lighter, parts easily available, but only a five speed.

[husaberg]

Some of both. The xr style seems the better bet, smaller lighter, parts easily available, but only a five speed.

Did you miss the same gear ratios as the mb100 bit.
same output sprocket to.
Coincidence i think not.

I should check out the part numbers really.

Later

Well they seem to be a mix of both.
The bearings do differ but that shouldn't be a major problem.
definitely warrants further investigation me thinks.

to be continued..................

[Buckets4Me]

Did you miss the same gear ratios as the mb100 bit.
same output sprocket to.
Coincidence i think not.

I should check out the part numbers really.

Later

Well they seem to be a mix of both.
The bearings do differ but that shouldn't be a major problem.
definitely warrants further investigation me thinks.

to be continued..................

I have a much easier solution but not going to spill the beans till my 100 turboed monster is going

[husaberg]

I have a much easier solution but not going to spill the beans till my 100 turboed monster is going

pics or it never happened

[Buckets4Me]

pics or it never happened

bugger now i need to download photoshop (well all the big engines used one program or another)