CHANGE IN STOCK 250 2 Stroke CLASS Drag rules!!!!

[Xowner]

Next year a stock airbox with a lid and stock carb will be required to run in the stock class no exceptions. The air box if found with holes in it will bump you to mod class. This Gives you guys plenty of time to get what you need to be legal. More rule changes may follow and will be updated in this thread.

[Billy Golightly]

Also, just an FYI, this isn't negotiable.


You wanna run the stock class, get an airbox, lid, and carb sourced and dialed to use at TF or you'll be racing in the modified class

[FastZ28]

Just for clarification, does this mean an 85 250r has to have the stock PE34 round slide, or would a PJ34 flat slide from an 86 250r be allowed? Just curious.

[zmpolaristech]

Wow...This will make things MUCH more interesting...WOW!!

[Tecate 50]

So throw out the double elimination due to time restraints but yet, lets measure the intake side of the so called stock carb for everyone. Where will this end, and who's idea does this inspire from......yours truly "Doom" the Open class champ with a 256 cc screw. This will be interesting, I guess the guys with 86-87 T-3's are just screwed. Good luck finding that set up. I will be watching for modified air lids.....hope this goes fair.

[zmpolaristech]

OK, I have SO many questions and needed clarifications here, such as:

1) Stock means STOCK...Right? as in, the EXACT same carb that came on your YEAR and MAKE of bike? (to cover FastZ28's question)
2) Will mod class still include the stretched big bores? As this new rule is no doubt going to put alot of stock length 250s into mod class, only to get eaten up by much bigger bikes.
3) Aftermarket pipes, heads, intakes, porting, and K&N's are all still legal?
4) What is the fuel octaine maximum for stock class? and mod class? (I know it is probably the same, but I don't remember...I would have to reccomend no alcohol/methanol in mod class, if that's not already a rule.)
5) ...more later. thanx boys!

[Billy Golightly]

Stock, as originally equipped. So yes, 85 250Rs have round slides. 86 Oval slide PJ's. We aren't measuring carbs. If someone wants to take a 34mm carb and bore it to 39mm and have air escaping the sides of the slide because it isn't wide enough, be my guest.

All other rules are still in effect for the stock class (as of this time, we might tweak things further but we will give you adequate time to adjust).

For clarification, pump gas only is all that has ever been allowed in the stock class. This is hard to enforce but we all know what race gas smells like...
Aftermarket pipes are allowed in the stock class as long as they are ran in OEM configuration (Ie, no out of frame drag pipes)


People have talked about building bikes around classes before, heres your chance Think of this basically as a restrictor plate class like there is in stock car racing. It'll make it more interested in my opinion from a spectator point of view to see what the riders and builders can do with that hurdle to overcome.

[Xowner]

So throw out the double elimination due to time restraints but yet, lets measure the intake side of the so called stock carb for everyone. Where will this end, and who's idea does this inspire from......yours truly "Doom" the Open class champ with a 256 cc screw. This will be interesting, I guess the guys with 86-87 T-3's are just screwed. Good luck finding that set up. I will be watching for modified air lids.....hope this goes fair.

Yes it will be fair, All bikes going threw tec for the stock class will be ask to pull up next to the water hose With the bike running where we will shoot water around the air filter box and the lid to see if there are any holes.

The carbs will be checked from the outside, as billy mentioned your not gonna get much from boring stock carbs out.

We are talking about doing double elmins but its just talk for now as we had just enough people to run singles, let alone trying to run two brackets at once.

We welcome any comments complaints and god forbid praises that you guys have.

[tecat-z]

I think i'll respectfully take a pass on someone spraying the garden hose on my bike, while my engine is running. That wash area is a hog wallow.......YUCK!!!!!!!!
Double E's are a must. Considering how well things went this summer, it should be of fairly high priority.

[Xowner]

I think i'll respectfully take a pass on someone spraying the garden hose on my bike, while my engine engine running thing. That wash area is a hog wallow.......YUCK!!!!!!!!
Double E's are a must. Considering how well things went this summer, it should be of fairly high priority.

Hose was a joke ed.

[Billy Golightly]

I would like to see double eliminations (In atleast 1 class) but I want to be 100% confident it can be pulled off. I don't want to let the success of this year cloud our judgment and bite off more than we can chew

[3Razors]

Can't see how removing the stock airbox lid is a no-no but an aftermarket exhaust system is good to go?! Thats like robbing peter to try and pay paul. One compliments the other. Stock airbox I can understand as many stock airboxes without the lid will usually provide the same amount of power (sometimes more depending on the engine) as just a clamp on filter, but no removal of the lid is farfetched.

Goodluck for the people with Tri-Z's and 84-85 Tecate as those airbox designs are handicapped. Shoot, even the ama back in the 80's and now let the teams do whatever they want with the airboxes in the 250cc class.

[jadleybray]

http://www.3wheelerworld.com/content...sses-and-rules

So, tell me if I got this right. "Any internal engine modifications allowed. 2 strokes are allowed to run aftermarket/non OEM cylinder heads." No CC limit in the stock class D division? If you can port and polish, bore cylinder, why wouldn't you bore the carb as much as possible? Cool head w/interchangeable dome is kosher too?

[zmpolaristech]

I pulled this from ^ his ^ link. I figured it would be good to have in this thread for reference. After reading through these, I would have to recomend that stock class be on stock swingarms!It only makes sense. Whats the sense of regulating the carbs in stock class, but you can run a +4.....

2 -Stock.
-Trikes only
-exhaust, must be ran in the way manufacture of your machine designed it.
(aftermarket pipes are allowed if ran in this manor)( No out of frames)
- frame must be to factory spec. (no frame mod's)
- Engine must be the original, OEM equipped one. No aftermarket or different then originally equipped cylinders for 2 strokes or 4 strokes.
Any internal engine modifications allowed. 2 strokes are allowed to run aftermarket/non OEM cylinder heads. 4 strokes are not.
-No hybrids, conversions or engine swaps. Machine must be an original OEM three-wheeler.
-swing arm's, can be stock length or up to +4" extended ( will be approved by a tec)
- Gas, must be on pump gas (no more than 98 octane) Aftermarket carbs, clamp-on airfilters, etc all allowed.
No race fuel or oxygenated fuels! (This will be given the smell test, if you fail your going to the modified class, sorry!)
- tires, stock or aftermarket... No studs!
-No wheelie bars
-aftermarket axle's OK
-we will try to pair up same bikes in the first round,or close too. 250r v.s. tri z ,,200x v.s. 200x
-ALSO, --NEW FOR 2011-- Highly modified mini's with larger displacement engines (150cc piranha engines in ATC70s, etc) will be ran in the class most appropriate for their CURRENT engine displacement. This means unless your over 174cc you will run in the 49-174cc Stock class. I understand this isn't an ideal situation but I do not believe there to be enough entrants to make a whole new class at this time. Perhaps next year.



3. Modified class.
-OEM trikes only
- any bike that has been modified Carb,bore,aftermarket cylinders,Big bores,long rods. NO engine swaps, or hybrids.
-swing arms, can be any length.
-wheelie bars, you can run a wheelie bar
-NO ALKY or NITROUS
-exhaust,pipe in or out of frame ok
-Studs permitted,must be ice screws,No picks,bolt tires,ect,atv use only.
-Basically created for the powervalved,big bore..300,310,330, stroker,ect.
-If you don't think you have what it takes to run with the big dogs in the open class..this is for you.
********At tec's discretion, if your bike don't fit the requirements of the class, you may be bumped to the open class in the interest of fairness to other competitors

4.open class.
- Trikes only
-All motorcycle or alternately based/customized machines.
-drag pipes or any custom. ok
-hybrid,conversions..ok
-swing arm, any length
-wheelie bars,ok, please use best judgment on building these. any loose bars will be asked to
tighten them up,before running. there for helping you not flip,not causing you to flip.
-fuel, Any fuel,race gas,alcohol,Nitrous oxide, all ok
-Tires,any tires
-studs, ok must be for atv use, (Ice screws),no picks

[Xowner]

http://www.3wheelerworld.com/content...sses-and-rules

So, tell me if I got this right. "Any internal engine modifications allowed. 2 strokes are allowed to run aftermarket/non OEM cylinder heads." No CC limit in the stock class D division? If you can port and polish, bore cylinder, why wouldn't you bore the carb as much as possible? Cool head w/interchangeable dome is kosher too?

Hold tight there is gonna be another update soon, Just wanted people that needed to get airbox's the early start.