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Post by Roger on Dec 13, 2011 18:47:55 GMT -8
Questions recently asked by a Driver and answered by Mark Bergfelt, UAS Director.
1) Item 2 a . last line states 217cc max displacement. So if a guy was to run a 250cc reed valve dirt bike engine what is his minimum weight ?
#1 Answer) The 250 is a single cylinder dirt bike engine over 217cc. It's 430 lbs.
2) Then what if a guy was to put on two 116cc Parilla TT's. 232 cc's IS this even legal or again does the base weight move up to 430# plus the aded weight per cc?
#2 Answer) Not legal. Tell him to get cylinder sleeves, or at least for one.
3) Clarification on rule 2.H "minimum weight for the engine corresponding with the higher weight will be imposed". Corresponding to what higher weight?
If he has one piston port and one reed valve, use the reed valve formula. In addition, If he put a reed valve on an engine that was originally a piston port, it's now a reed valve engine.
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Post by Roger on Dec 13, 2011 18:52:35 GMT -8
Roger, concerning Saturdays UAS tech, please give me your interpretation of the rules regarding "brakes". Most of it is self explanatory, but I have a question about the last sentence. I says that a lockwasher or a single locknut is not enough. Do you take this to also include the bolts/nuts that affix the rotor to its hub? Presently our set up has locknuts ( not nylon style nuts, but solid steel locknuts) which were a factory installation by the chassis builder. Thanks
ANSWER: Nuts and lockwashers are not approved on brake rotors unless....the exposed threaded end of the bolt is drilled and tie-wired (Min. 3 bolts drilled and tied).
I think your refering to "nylocks" or "crushnuts".....these are legal by themselves...HOWEVER,......for brake rotors or any other component that can be subject to high temperatures you must use....either steel "crushnuts" (same as nylocks only steel where the nylon would be) or stainless steel tie-wire.
It should also be noted that a zip-tie is not to be used in place of tie-wire.
Hope this clarifies the question.
Roger
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Post by Roger on Dec 15, 2011 15:16:10 GMT -8
Another question I've had many ask is, "bodywork must not extend past the rear bumper".
Answer: I clarified this through Mark Bergfelt; If your bodywork extends past your rear bumber you have 2 fixes.
1) Cut your bodywork until it is even with your rear bumper.
2) Remove your rear bumper and weld extension tubes on to your existing bumper until it is even with your existing bodywork.
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