Springer-Rake, Trail!!!!!!!!!!

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shovelgreg
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SELF INTRODUCTION: I am a 60 year old retired auto worker, have 2 shovels-81flt, 93", and a custom 98 shovel-springer. love motorcycles-tools-welding. have a small home shop, lathe, mill, tig&mig, do all my own work-motor, paint, wiring, fab.

Springer-Rake, Trail!!!!!!!!!!

Post by shovelgreg » Thu Nov 29, 2012 6:44 pm

Okay, here is what i have--Paughco +6" taper leg springer, Kraftech rigid frame, 38 rake, + 2" in down tubes. I have been using this springer on a swingarm frame Paughco, with 34 rake +2" down tubes. This thing rides and handles great. After mocking up with the rigid-looks like its going to be about 1" short!
So to my question--RAKE & TRAIL, i sure as hell cannt make anything of it? Can i change the shape of the rockers-to raise the front end? Or should i just cut the frame and remove 3-4 degrees of rake??? There is no way i am going to cut the front end.
I need a lay-mens way of figuring rake and trail. And what are we looking for in trail? 3 3/8" or more or less????? Sure dont want to mold and paint frame just to do it again! HELP !!!!!!!!!!! Greg

rakeNtrail
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Re: Springer-Rake, Trail!!!!!!!!!!

Post by rakeNtrail » Thu Nov 29, 2012 8:38 pm

This help? Rockers can be about any shape as long as they can still travel.


Image

TattooLeeRoy
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SELF INTRODUCTION: Hi. I am LeeRoy, been biking for 30 yrs now. I ride an ironhead sportster, and (since I have a rider) am wanting to start a ground up build. I am really happy I found CBH, and want to thank you for info it contains. I look forward to the sportster hardtail article, and hope for a girder article
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Re: Springer-Rake, Trail!!!!!!!!!!

Post by TattooLeeRoy » Thu Nov 29, 2012 9:16 pm

Looks like some offset to the trees. Run a center line down the steering head, (not the rear leg) to the ground. Run a verticle line from ground through axle center. The distance between these points is your trail measurement. If the tire center is ahead of the steering center then it is negative trail. Generally considered not good. Usually looking at a floating range of around 3-4 inches.

Most of my time is on bobbers, so someone will probably be able to give you more about your setup. I hope that helps.
We can do anything, impossible just takes longer.

krymis
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SELF INTRODUCTION: Hey dan it chris (krymis) from the CBH board. thanks for opening this back up. hope to have a project to show the build here. BLAH BLAH BLAH BLAH BLAH and so on and so forth. The book of revolations and worlds ends and shit like that.....

Re: Springer-Rake, Trail!!!!!!!!!!

Post by krymis » Fri Nov 30, 2012 1:10 am

...useless post as i was not paying attention to the conversation....
Last edited by krymis on Fri Nov 30, 2012 7:35 am, edited 1 time in total.

TattooLeeRoy
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Posts: 74
Joined: Thu Aug 09, 2012 12:59 am
SELF INTRODUCTION: Hi. I am LeeRoy, been biking for 30 yrs now. I ride an ironhead sportster, and (since I have a rider) am wanting to start a ground up build. I am really happy I found CBH, and want to thank you for info it contains. I look forward to the sportster hardtail article, and hope for a girder article
Location: San Antonio, TX
Contact:

Re: Springer-Rake, Trail!!!!!!!!!!

Post by TattooLeeRoy » Fri Nov 30, 2012 2:29 am

I said offset, not rake.
We can do anything, impossible just takes longer.

krymis
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Posts: 275
Joined: Sun Nov 06, 2011 12:46 pm
SELF INTRODUCTION: Hey dan it chris (krymis) from the CBH board. thanks for opening this back up. hope to have a project to show the build here. BLAH BLAH BLAH BLAH BLAH and so on and so forth. The book of revolations and worlds ends and shit like that.....

Re: Springer-Rake, Trail!!!!!!!!!!

Post by krymis » Fri Nov 30, 2012 7:34 am

sorry misread. it was midnight and my wife was talking to me while i was typing.

Yes there is offset of 1" i think. i would have to check my blueprint to verify. And yes measure the trail along the centerline of the steering axis

TattooLeeRoy
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Posts: 74
Joined: Thu Aug 09, 2012 12:59 am
SELF INTRODUCTION: Hi. I am LeeRoy, been biking for 30 yrs now. I ride an ironhead sportster, and (since I have a rider) am wanting to start a ground up build. I am really happy I found CBH, and want to thank you for info it contains. I look forward to the sportster hardtail article, and hope for a girder article
Location: San Antonio, TX
Contact:

Re: Springer-Rake, Trail!!!!!!!!!!

Post by TattooLeeRoy » Fri Nov 30, 2012 2:16 pm

No biggie, I figured it was something like that. I did the same thing, took me a minute to realize the Sugarbear wasn't the set up in question.
We can do anything, impossible just takes longer.

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