Raked front end?
Elite HDF Member
Joined: Apr 2009
Posts: 3,928
Likes: 1
From: Desert S. West
Thread Starter
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Tourer
Joined: Sep 2009
Posts: 373
Likes: 0
From: Lincoln, ND
Here are the numbers for what i want to do. 7 degree rake with 6in over forks. Any thoughts suggestions etc?
Thanks!
Thanks!
New Fork Angle in degrees 42.77
New Steering Neck Angle in degrees 35.77
Trail in inches 1.37
New Wheelbase in inches 70.83
Rear axle centerline to centerline top of steering neck, inches 50.72
Rear axle centerline to front axle centerline, inches. (Same as wheelbase) 70.83
Top of steering neck centerline to ground, inches 39.53
New Steering Neck Angle in degrees 35.77
Trail in inches 1.37
New Wheelbase in inches 70.83
Rear axle centerline to centerline top of steering neck, inches 50.72
Rear axle centerline to front axle centerline, inches. (Same as wheelbase) 70.83
Top of steering neck centerline to ground, inches 39.53
Last edited by SeMiGoD; Dec 28, 2009 at 07:39 PM.
Road Warrior
Joined: Oct 2008
Posts: 1,321
Likes: 4
From: Rochester, MN
If you go to RB Racing they have a Rake and Trail Calculator at the bottom of the page or you can download software to calculate it at Motorcycle Metal.
Last edited by DragonSlayer08; Dec 28, 2009 at 09:07 PM. Reason: Add a site
Tourer
Joined: Jan 2008
Posts: 314
Likes: 5
From: Albany Oregon
Like I said, A Bike needs 4-7inches of trail. A little less than that may still be rideable but not very safe. 1.37 inches of trail would just be a very scary thing. Someone may have done it in the past but I will bet it wasn't for very long. I personally do not think you would be able to turn at all. If you look at my photo albums, you will see that I have some experience with building raked choppers.
Outstanding HDF Member
Joined: Dec 2009
Posts: 2,312
Likes: 12
From: Missouri
I would listen up to these guys, there is one thing that every biker really fears, sudden, uncontrollable front end wobble at high speed, it starts out feeling a little loose, then instantly goes into a full blown level 100 pucker factor, and if you pull out of it you will have performed a miricle that Jesus would be proud of, and if you dont pull out of it, you will perform another miricle by walking away.
I raced Motocross in my younger days, and have experienced uncontrolled front end wobble and it was nothing i would like to experience at highway speeds. forget cool, figure out a way to do it SAFELY.
I raced Motocross in my younger days, and have experienced uncontrolled front end wobble and it was nothing i would like to experience at highway speeds. forget cool, figure out a way to do it SAFELY.
Advanced
Joined: Jan 2009
Posts: 67
Likes: 1
if u really want the raked look of a front end
the best bet is going to be physically raking the frame, cut the neck and move it outwards, gotta know a damn good welder tho
sounds alot more scarier, but the trail problem wouldnt be there as it would if u put raked trees
and also
have u ridden a bike with such a big rake before?
the best bet is going to be physically raking the frame, cut the neck and move it outwards, gotta know a damn good welder tho
sounds alot more scarier, but the trail problem wouldnt be there as it would if u put raked trees
and also
have u ridden a bike with such a big rake before?
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Thread Starter
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Tourer
Joined: Sep 2009
Posts: 373
Likes: 0
From: Lincoln, ND
I would listen up to these guys, there is one thing that every biker really fears, sudden, uncontrollable front end wobble at high speed, it starts out feeling a little loose, then instantly goes into a full blown level 100 pucker factor, and if you pull out of it you will have performed a miricle that Jesus would be proud of, and if you dont pull out of it, you will perform another miricle by walking away.
I raced Motocross in my younger days, and have experienced uncontrolled front end wobble and it was nothing i would like to experience at highway speeds. forget cool, figure out a way to do it SAFELY.
I raced Motocross in my younger days, and have experienced uncontrolled front end wobble and it was nothing i would like to experience at highway speeds. forget cool, figure out a way to do it SAFELY.
Tom
Road Master
Joined: May 2009
Posts: 1,232
Likes: 8
From: Powder Springs, GA
These guys are right on with their knowledge on raking trees versus the frame etc. Use the calculators and do it the right way. This bike I built below was 40 in the neck and 5 in the trees. Was very easy to handle and the trees helped to bring that trail number down. My trail was around 4 inches when all said and done so raked trees do have a good purpose when used properly. Before I chopped the bike up it was flat out 38 in the neck and was a bear at slow speeds with about 7 inches of trail but was very stable at high speed. Give me too much trail ANY day over too little. There are kits out there that supposedly keep the trail correct. However I have no idea how they work.
