mnz rule changes

**twinshock750** · 20th November 2007, 22:35

Truth be told it's the same for everyone so who cares? It's not like they said "you guys can use slicks and you guys over the there can only use IRC's!"

**johnsv650** · 21st November 2007, 06:32

the parts in our engine are all orginal parts for that motor.
we comply with rules as they were put out in july 2007,
standard motor but you can change your cam timing, then its not standard ! but its in the items that can be changed.
rules say you can put on a full racing exhaust , is that enhancing your motors performance from standard, i know from dyno results it increases standard motors performance.
is your motor standard if its been rebored out for no other reason than to get more cc out of it but its still a standard motor.......
change the rules in july 2008 !

**Deano** · 21st November 2007, 06:40

Originally Posted by johnsv650

the parts in our engine are all orginal parts for that motor.
we comply with rules as they were put out in july 2007,
standard motor but you can change your cam timing, then its not standard ! but its in the items that can be changed.
rules say you can put on a full racing exhaust , is that enhancing your motors performance from standard, i know from dyno results it increases standard motors performance.
is your motor standard if its been rebored out for no other reason than to get more cc out of it but its still a standard motor.......
change the rules in july 2008 !

Did you ask about fitting the inlet camshaft first ? If in doubt, check it out is my motto.

**johnsv650** · 21st November 2007, 06:47

yes of course, confirmed with mnz,
and two race engine builders before......

**BornToLean** · 21st November 2007, 07:31

When you stop and think about it, it's kind of pointless if you're allowed to swap out the exhaust cam, because then everyone one will do it, and then we'll all be back to equal performance again - only the costs have gone up.

Incidentally, I've asked them about the Tyre Safety Rating rule as well. Limiting to V or Z makes it very hard to get a decent tyre, most modern tyres are now 'W'. (The W Rating is better/safer than V or Z.) Mr Stewart was going to look into it prior to the final rule being published, but nothing changed.

**GSVR** · 21st November 2007, 07:37

Originally Posted by twinshock750

Truth be told it's the same for everyone so who cares? It's not like they said "you guys can use slicks and you guys over the there can only use IRC's!"

Just like F3 ? Every time I read the first paragraph of the F3 rules I wonder. Have rulebook can cheat.

No powercommanders, no slotted cams, no non standard rear subframes, no $2000 aftermarket shocks, no fairings allowed (naked class), one set of proddy tyres no wets. Hell this could have been a cheap entry level raceclass. Problem is it probably would get too popular and the premier production classes would suffer.

I can remember Robert Holden taking his Harley Sportster racing quite seriously.

Streetstock would be a good class to race in but I would feel like a bastard ruining the racing for the young people this class is intended for. That would be if I could actually keep up with them.

**The Stranger:Me** · 21st November 2007, 07:43

Originally Posted by johnsv650

the rule as published said
twin cylinder four strokes up to 650 cc standard engines,
(only oem engine parts for that model maybe fitted).

Do you feel that changing to a camshaft other than the original would fit the definition of "standard"?

**GSVR** · 21st November 2007, 07:47

Originally Posted by The Stranger

Do you feel that changing to a camshaft other than the original would fit the definition of "standard"?

Sorry to answer a question not directed at me but why would you need to slot the cams on a (standard) engine unless it was to dial them back in after illegal engine mods?

**The Stranger:Me** · 21st November 2007, 07:53

Originally Posted by Garry H

Sorry to answer a question not directed at me but why would you need to slot the cams on a (standard) engine unless it was to dial them back in after illegal engine mods?

To adjust them precisely to spec.

**k14** · 21st November 2007, 07:53

Originally Posted by The Stranger

Do you feel that changing to a camshaft other than the original would fit the definition of "standard"?

Exactly. As far as I'm concerned (and maybe other people I'm sure) standard means exactly the same as when it came out of the factory!

**BornToLean** · 21st November 2007, 08:11

Oh Okay........'Slotted' for the purpose of Timing Changes, not slotted for weight saving

Blame it on my background in older bikes.
However, I still don't think that stretches to 'replacing' the cam.

**GSVR** · 21st November 2007, 08:24

Originally Posted by The Stranger

To adjust them precisely to spec.

So why not have stepped rotor keys as well while we are at it or slot the sensor pickup to get the ignition timing to "precise" spec.

Suzukis are so badly made all this stuff is all over the place right?

I'm aware of what you are saying but doesn't this just open up a pardoras box.

**GSVR** · 21st November 2007, 08:32

Originally Posted by BornToLean

Oh Okay........'Slotted' for the purpose of Timing Changes, not slotted for weight saving

Blame it on my background in older bikes.
However, I still don't think that stretches to 'replacing' the cam.

Of course not its just a case of seeing a gap in the rules and expoiting it.

Airbox and airfilter rules worry me as I have been made aware of just how much can be gained by not following the rules here to the letter. Some don't consider this cheating either.

Can anyone tell me if your allowed to remove the emission pipework off a US spec bike for Protwins or not?