P/P Clarification

[Flyboy]

I, like many other racers, are under the assumption that the P/P class is strictly for stock bikes with unopened engines yet in the Bonneville and AMA records in the 1350 class there are two records over 200 mph which we know were not stock engines. What part of the rules interpretation am I missing?

[Speed Limit 1000]

"Any performance modifications must be out of view." From the rule book, as to the inside of the motor.

[1212FBGS]

yep, you can do anything you want to the motor as long as it breaths through the stock throttle bodies and stock exhaust pipe. Usually the limiting factor, my p/p busa is making 202hp at the rear wheel and anything else we do gets choked down to the exhaust
kent

[Flyboy]

If that is the case one could hide a nitrous bottle under the seat and run nitrous with the stock mufflers. The fairing would hide any of the lines or jets--

Are you telling me that the only difference between MPS and P/P is the visible exhaust muffler? That can't be right.

[1212FBGS]

p/p is a gas class. NOS will get ya a 5 year suspension yep a pipe will move ya to M.... M will also allow you to do other performance things but basically the answer is yes.
kent

[Flyboy]

The rule book states that 500 units have had to have been made. If someone modifies their engine then I doubt 499 other people have modified theirs. A modified engine is not a production engine. It's like cheating at golf. When was this rule modified and why?

[Seldom Seen Slim]

500 units had to be built -- by the factory, not 500 with whatever mods you care to put on your bike.  In other words, a true "production" bike.  But once you've got it -- bore/stroke it to the maximum allowed in the class that the factory version would be (i.e., the Kawasaki 636 could be opened to 649.9 cc, as could a 599 cc Honda, and so on).  Airbox and exhaust have to look precisely like stock -- from the outside.  You're welcome to gut the muffler, though, although you'd better be sure to save the factory outlet parts and put them back.  I don't know exactly how picky the impound inspectors would be if you opened up the exhaust canister to remove stuff and then put it back together with a patchy-looking job (poor rivets, lousy welded up seam, etc.  Make it look exactly like it came from the factory!).

You wonder why there's so much allowed in the "production" class?  Don't spend too much time wondering -- just go ahead and do whatever you want, asking for guidance from us as you go.  Have fun at it while you're at it, too.

[Stainless1]

And if you can convince them the rear fender (mudflap) is a license plate holder you can take that off too! 
There is no longer a rule that prevents taping seams and using tape to aerodynamically cover fastening devices.  so tape all your seams and smooth up the area around the windshield, that is worth a few MPH.  BNI, can't say what AMA rules say.  Good Luck and keep us posted on what you plan to do. 

[Flyboy]

Thanks guys.

[JackD]

The origin of the Production Motor modification allowances goes back to the origin of the class when it was first described.
There never was a rule that allowed taping of seams on a Production motorcycle.
If it is allowed now it is a change that reflects the scattered rulers ability and is not allowed in cars for example.
To allow a modification like that would change the stock contour and obsolete all the records that have gone before.
It is the same mentality that prohibits S+S cases in Modified now, unless it came with the thousands of HD clone bikes that are legal for production.

"Worthless changes like that cause endless errors in LSR." (me)  
 

[1212FBGS]

no.... i pretty sure you can't tape the seams on a p/p bike, that would be a visual modification. I'll ask this weekend, we plan on running the 1350 p/p, and a 250p/p, and a 175p/pv
kent

[Stainless1]

Current pp 1000 holder had taped seams and tape over the body fasteners.  They did use clear tape.  No rule preventing that I could find.  There was one in the past that I remember, but I haven't looked in my old books. 

[JackD]

Sounds like a slip doesn't it ?
Tape alters the contour and it is streamlining.
Failure to notice that is just a failure. 
Do we have a case of fooling the blind or is it mocking the afflicted ?
" I see" said the blind man, but he didn't see at all.