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Author Topic: New Guy. Lots of Motorcycle Related Questions.  (Read 1003 times)

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Online salt27

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Re: New Guy. Lots of Motorcycle Related Questions.
« Reply #15 on: August 29, 2020, 07:56:41 PM »
That seat should be fine for "M" class.
Just make sure that it is not over 36" high and doesn't extend rearward past the tire.

Here is the current holder of the record you are running on.

Offline Stainless1

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Re: New Guy. Lots of Motorcycle Related Questions.
« Reply #16 on: August 30, 2020, 09:39:49 AM »
In open bikes streamlining is anything in front of the rider that appears to direct or divert air.

Seat and tail follow partial streamlining rules.

I would not use the wrap around rear fender.... it will grab air and slow you down.... and if I remember the tail and rear fender rule say it can't extend past the back tire.
Use bars that force your elbows in to help the rider maintain a tight tuck.  Smallest rider you have.... be sure your rider and owner is a BNI member and must have a motorcycle drivers license.
Good luck with your project... Become one with the motorcycle  :cheers:

edit... Take a good look at the picture of the current record holder.... read the rules 50 times.... don't add anything to the rules... nothing is implied, they are what is written in the book.
« Last Edit: August 30, 2020, 09:47:01 AM by Stainless1 »
Stainless
Red Hat 228.039, 2001, 65ci, MSA Bockscar Lakester with a little N20 
MSA Bockscar Lakester #1000 my fastest mile 245 and change, 84 ci turbobusa motor... but Corey's 233 MPH H/BFL record is still 3MPH faster than mine.

Offline Vintage_Honda_Garage

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Re: New Guy. Lots of Motorcycle Related Questions.
« Reply #17 on: August 30, 2020, 01:01:48 PM »
Seat and tail follow partial streamlining rules.

Are you saying that the blue seat in my previous post would fall under partial streamlining?

Offline 07R1LSR

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Re: New Guy. Lots of Motorcycle Related Questions.
« Reply #18 on: August 30, 2020, 01:09:22 PM »
Take a look at 7.F.12   Look at a few paragraphs into this section.  It states that if a streamlined seat, tail section or fender is used, it can not extend further to the rear than a vertical line drawn at the rear edge of the tire (This is for non OEM components)...meaning that seat cannot extend beyond rear edge or tire.  I used a level and stood it vertically against the rear tire and made sure my aftermarket rear fairing didnt extend past the rear tire.  I had to fab up some mounts to move the rear fairing forward about 1.5 inches.  Another option is to extend swing arm slightly to get rear tire further back.  Rules state you are allowed to extend wheel base 10%.  Good luck with your project! 

Online salt27

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Re: New Guy. Lots of Motorcycle Related Questions.
« Reply #19 on: August 30, 2020, 01:28:23 PM »
Seat and tail follow partial streamlining rules.

Are you saying that the blue seat in my previous post would fall under partial streamlining?


In a nutshell Stainless is saying the blue seat is ok to use in "M" class.

  Don