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  • June Project of the Month (Click "x" at right to dismiss)
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Small mod on triple tree

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burtonbr

Active User
H-M Supporter-Premium Member
Joined
Oct 7, 2013
Messages
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94
#1
Added a small recess and threaded holes in this tree for internal fork stop, took it real slow since I only had one chance to get it right. These were made for external stop and I use an internal. Not much machining to show it didn’t take too long but here’s a few pics.
38C2B5FA-0ED1-4DB2-8828-B66409CEBC2A.jpeg

With the cam stop installed
1677F551-E2D9-480F-ABC9-F03A5E2A20F9.jpeg


I knew the trail length was long on this bike with 0 deg trees and 10” over tubes and that was probably the reason it handled so stiff at 40+ But wasn’t sure the best way to correct it. I thought about building a Springer, or buying one but hated to spend a lot without knowing for sure it would improve the bike or the handling. I Did a few measurements and drawings in cad to see how much I could go with offset, raked trees and extended tubes.
Found a cheap set of 4deg trees and figured 16” over tubes would get the trail under 6” and only raise the steering head about 1”, it was cheap enough and figured I could always change it back if I didn’t like it.

This is the way it started. Trail was somewhere over 10” best I can measure
72667162-CC39-4DE8-8ED6-F3D0182C8CB2.jpeg



New tubes and trees, trail is about 5 3/4” best I can measure
71DA99E3-ACA8-49BF-99DC-2423077D3A5D.jpeg

I wish I had done this a couple of years ago, the ride and handling is sooooo much nicer, I always heard too much trail is bad but never experienced it and after riding it both ways it doesn’t feel like the same
 

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rzbill

The cheapest thing in an airplane is the pilot.
Active Member
Joined
Feb 16, 2017
Messages
136
Likes
148
#2
Added a small recess and threaded holes in this tree for internal fork stop, took it real slow since I only had one chance to get it right. These were made for external stop and I use an internal. Not much machining to show it didn’t take too long but here’s a few pics.
View attachment 245169

With the cam stop installed
View attachment 245172


I knew the trail length was long on this bike with 0 deg trees and 10” over tubes and that was probably the reason it handled so stiff at 40+ But wasn’t sure the best way to correct it. I thought about building a Springer, or buying one but hated to spend a lot without knowing for sure it would improve the bike or the handling. I Did a few measurements and drawings in cad to see how much I could go with offset, raked trees and extended tubes.
Found a cheap set of 4deg trees and figured 16” over tubes would get the trail under 6” and only raise the steering head about 1”, it was cheap enough and figured I could always change it back if I didn’t like it.

This is the way it started. Trail was somewhere over 10” best I can measure
View attachment 245171



New tubes and trees, trail is about 5 3/4” best I can measure
View attachment 245173

I wish I had done this a couple of years ago, the ride and handling is sooooo much nicer, I always heard too much trail is bad but never experienced it and after riding it both ways it doesn’t feel like the same
I complement you on your suspension work. Its always good to engineer a solution and have it actually work. I did similar on a custom sportbike 10 years ago. I was moving from goofy sized mid 80's tires to modern 17" radials and a bit more width. Made sure the geometry was not changed. Handling sucked as a result. Wound up reducing rake and trail and the handling came back. Big grin. Nice work on your part.
 

Tool Chatter

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H-M Supporter-Premium Member
Joined
Feb 16, 2018
Messages
29
Likes
14
#3
Really great solution. Looks better, and no doubt as you said handles better.
 
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