1977 CT70 Basket Case

kirrbby

Well-Known Member
I think this is the thread...see my post above.
 

nightgrider

Member
They aren't as smooth as the originals, but I can get the tops through the clamps that's were it stops. When I did measure both the original and aftermarket forks there is a bit of a taper too them. They both start a little below 25mm and gently taper to 25mm. If I can get some time today I'll get a picture of how far I can slide the forks through before they stop.
 

kirrbby

Well-Known Member
The thread above is good reference. That member only had luck after he put the legs in the freezer.
Maybe some heat, and some cold, and definitely remove those screws...or use them to push.
 

nightgrider

Member
I think this is the thread...see my post above.
I always remove the clamp bolts when attempting to install the forks. The forks won't fit in my freezer. They are too long. Maybe I need to barrow my in-laws chest freezer for a bit. Haha
 

JHminitrails

Active Member
If it was in a collision, then I'd suspect the tree is damaged in some manner. Also someone could have extremely over torqued the pinch bolt and squished the clamp opening severely. Either way, keep at it without hammers or other brute force efforts
 

nightgrider

Member
If it was in a collision, then I'd suspect the tree is damaged in some manner. Also someone could have extremely over torqued the pinch bolt and squished the clamp opening severely. Either way, keep at it without hammers or other brute force efforts
I agree. I'm definitely using the kid gloves approach. These parts aren't cheap.
 

kirrbby

Well-Known Member
I would definitely think the problem is in the new aft legs. But if it is the triple tree...I have a stack of them...and could sell pretty cheap. But I do not have a 77 red.
Here at work we chill stuff using dry ice and a insulated box. I've build more than a few insulated boxes using plywood and Dow foam. Couple were pretty dang big...like 4x5x4...or 3x3x10. Then they fill around the part with dry ice chips and leave it overnight.
This all for big heavy metal that REALLY needs to fit on the first try :)
 

nightgrider

Member
I would definitely think the problem is in the new aft legs. But if it is the triple tree...I have a stack of them...and could sell pretty cheap. But I do not have a 77 red.
Here at work we chill stuff using dry ice and a insulated box. I've build more than a few insulated boxes using plywood and Dow foam. Couple were pretty dang big...like 4x5x4...or 3x3x10. Then they fill around the part with dry ice chips and leave it overnight.
This all for big heavy metal that REALLY needs to fit on the first try :)
I'm going to do a few more things to see if I can get them to fit. But I may take you up on a different triple tree. I could meet you half way since we aren't that far from each other. I'll pm you if my other test don't pan out. I really appreciate everyone's input.
 

nightgrider

Member
Got some time today. It's definitely the aftermarket forks that are the issue. The originals slid right back in with little resistance. I put the calipers on both the original and the aftermarket again. Originals measured 24.91mm the aftermarket are 24.93mm... crud... I'll have to take some more measurements to see how much interference is along the whole length of the aftermarket forks.
 
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Robert thran

Well-Known Member
You could buy a small ball style hone in the right size and possibly work the tree for awhile and open up the holes…the style hone in picture but smaller would work. I know I’ve loosened up some cylinders pretty fast using them..also use with a lot of oil or you will kill the hone. Wd40 works good. im not saying for sure it would work but might be worth a try?
 

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nightgrider

Member
You could buy a small ball style hone in the right size and possibly work the tree for awhile and open up the holes…the style hone in picture but smaller would work. I know I’ve loosened up some cylinders pretty fast using them..also use with a lot of oil or you will kill the hone. Wd40 works good. im not saying for sure it would work but might be worth a try?
I was actually talking with my dad about it yesterday and he suggested honing the clamps on the triple tree. Since the aftermarket forks are really close to fitting, I just need to relieve the clamps a little bit. I found a 3 stone brake cylinder hone (adjustable from 13mm - 57mm) that should work. I'd probably only need to hit it a few times to relieve the clamps enough, and it would make sure the clamp stayed in round.

 

Robert thran

Well-Known Member
I was actually talking with my dad about it yesterday and he suggested honing the clamps on the triple tree. Since the aftermarket forks are really close to fitting, I just need to relieve the clamps a little bit. I found a 3 stone brake cylinder hone (adjustable from 13mm - 57mm) that should work. I'd probably only need to hit it a few times to relieve the clamps enough, and it would make sure the clamp stayed in round.

If you use a 3 three stone I would slide in a thin piece of metal that fits the pinch gap other wise it could destroy your new hone…also I dont think a 3stone hone will have enough pressure to cut the metal very fast..you might be there all day and it will be hard to control to keep in in that small area. the ball hones a longer so you can move your drill back an fourth without it trying to jume out of the bore. .. just my thoughts….
 

nightgrider

Member
If you use a 3 three stone I would slide in a thin piece of metal that fits the pinch gap other wise it could destroy your new hone…also I dont think a 3stone hone will have enough pressure to cut the metal very fast..you might be there all day and it will be hard to control to keep in in that small area. the ball hones a longer so you can move your drill back an fourth without it trying to jume out of the bore. .. just my thoughts….
I'll have to see if I can find a ball hone that is small enough diameter. Thanks for the suggestion.
 

Robert thran

Well-Known Member

Robert thran

Well-Known Member
I was digging through my tool box at work an found this 80 grit emery cloth buffer…if you can find one in the right size it might do the job?
 

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