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Author Topic: Altered frame rules  (Read 1078 times)
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Sequim Jim
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« on: February 18, 2018, 09:57:17 AM »

Hi,
I'm building a BMW R100RT (airhead) to race in the APS-PF class. The frame is my own design, along with the chain drive conversion. Do I need to have the frame pre-inspected before Bonneville? I probably will not bring the bike I rode last year. Do I keep the same racing number or do I need to have another number assigned to my new bike?


* Concept BMWcolored crop.jpg (325.15 KB, 3166x1337 - viewed 63 times.)
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Best regards
Jim
Stainless1
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Robert W. P. "Stainless" Steele Wichita, Kansas



« Reply #1 on: February 18, 2018, 10:34:07 AM »

SCTA or AMA
If SCTA you will need a new log book and frame sticker... Your number is yours, not the vehicle's.
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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.
donpearsall
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« Reply #2 on: February 18, 2018, 12:31:01 PM »

I have built bodywork similar to what you have drawn. I just wanted to compliment you on your sketching skills!
Also, make sure you can see straight ahead. You may have to raise your head a bit more.

Don
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550 hp 2003 Suzuki Hayabusa Land Speed Racer
Sequim Jim
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« Reply #3 on: February 19, 2018, 09:27:22 AM »

Thanks everybody!
One of my friends sent an email telling me the same thing. I was considering bringing two bikes but he said it's a lot of work, so I will have to decide whuch bike to going to Utah this year.
The BMW has been slightly changed and I'm having problems getting parts from Germany, so we'll see how things go.


* 20180120_173715 crop.jpg (408.28 KB, 3060x1653 - viewed 103 times.)
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Best regards
Jim
wobblywalrus
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« Reply #4 on: February 19, 2018, 10:12:49 AM »

It looks like it would be a lot more comfortable if the knees are moved back behind the cyl heads.
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bones
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« Reply #5 on: February 19, 2018, 05:36:34 PM »

I have been helping a mate here in Australia with an air head BMW for the same class.
It looks like you have taken a chain off the diff to the rear wheel. Unfortunately a lot of HP is used in the diff.
My mate has turned the engine 90* and used a TT Industries Norton box with a belt primary.
Turning the engine has not helped the width but it is a more efficient drive train.
Last year at Gairdner he ran a very easy 135.
We will see how it goes in a few weeks.

Like Wobbly said-- If you could move your foot rests back and also your seat, you may be able
to flatten your back, better aero,
I will get a picture and see how I go loading it.


cheers     Bones
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grumm441
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« Reply #6 on: February 22, 2018, 04:21:39 PM »


It looks like you have taken a chain off the diff to the rear wheel. Unfortunately a lot of HP is used in the diff.


cheers     Bones

There's no differential in there
It's a final drive
G
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