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Discussion Starter · #1 ·
Ok, the frame is mocked up with the fork now. Im trying to decide how much it needs to be cut. Id like to keep the bike low & level (maybe a hair higher up front). Its a 70 frame with a 72 fork, with the proper bearing kit installed. Things just dont seem right in the neck area. does anyone else run this combo? when the top tree is all the way down to the bearing the big old stem bolt doesnt sit flush, it bottoms out on the bearing. do i need a spacer? Also the lower bearing doesnt sit flush on the bottom tree, it seems to be about 3/16 from it so when its mounted on the bike, the turn stops bearly hit the tree. is this another common thing with this conversion? check out this pic for details:

 

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Are you running just the 72 forks or the whole front end assembly. It should definitely not look like that. Looks like the stem may be too long for that frame.
 

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Discussion Starter · #3 ·
from what i understand, the whole front end is 72. i got this bike in boxes. how far out of the upper bearing should the stem hang out? mines only out about an inch (aww, poor me.) then when i put the top tree on & the bolt, the bolt bottoms out about 5/8" before the bolt head even hits the tree. something is wierd here.
 

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sojerscraper said:
from what i understand, the whole front end is 72. i got this bike in boxes. how far out of the upper bearing should the stem hang out? mines only out about an inch (aww, poor me.) then when i put the top tree on & the bolt, the bolt bottoms out about 5/8" before the bolt head even hits the tree. something is wierd here.
There shouldn't be any space at all. I would try and get a hold of 70 triple trees or stem looks like the 72 is too long. The bolt should be snug otherwise you will have quite a ride.

what frame is that btw?
 

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Discussion Starter · #10 · (Edited)
hey truth, thanks for the input on both fork threads i posted. here are some more pics, as requested.

this pic shows how the lower bearing doesnt sit all the way down at the base of the stem. is this right?


this is how much of the stem hangs out of the top bearing:


and this is what happens when i put the top tree on & thread the bolt down to the bearing.


the races seem like they are set in place, and the bearings sit flush.


sorry about the blurry pics, i thought i had my camera set on close-up but i guess i didnt.

anyhow, the frame is a 70 TR6C - Trophy.

thanks again for any help you guys can give.
 

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Truth said:
we put 70's front ends on 60's frames all the time... with no issues. post up some more pictures of the front end so we can take a look at it.
What do ya think your some some dude that builds badass triumphs up in boston......and likes to plaster porn on hotel windows!? :D
 

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Discussion Starter · #12 ·
well, i found out today that the lower bearing is actually sitting on a shoulder on the stem itself. it will not go down any further. im thinking the solution to the problem will be to just cut the top bolt i half that holds the top tree down onto the bearing. is that usually how it is?

seems like it would be a safe setup. but 'seems like' and 'it sure as hell is....' are two different ballgames. id rather bank on the latter.
 

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Discussion Starter · #13 ·
well i figured it out. all i had to do was cut the part of the stem bolt off that didnt have any threads (1/4") . the spacing was right on after that. also, i noticed the top bearing was exposed to the elements & i didnt like that idea. i went to lowe's & bought a pipe flange (the chrome ring that goes around a pipe where it meets a floor or a wall - cost $1.50). i shaved down the center area a bit so it would be flat & i placed it on top of the bearing & under the top tree & it looks perfect. it also fits perfect, ill post a pic later if anyone is interested.
 
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