Author Topic: K2 Front fork trouble  (Read 1778 times)

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Offline 7fifty4

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K2 Front fork trouble
« on: July 02, 2017, 02:53:55 PM »

I have trouble with the front forks - new front fork tubes

here is what I am trying to do

Please note - I dont do step 9
after step 8  - all falls apart  - so to speak

after step 8 I tighten up all bolts and that where it goes pear shape,
after I tighten up one lower triple tree bolt, it is out of alignment again !!
no matter what I do...

Here is the process I am following, I found that on the sohc forum:

1.  Loosen the top clamp bolt on the steering stem.
2.  Loosen the top steering stem nut.
3.  Tighten the top fork clamps
4.  Tighten the lower fork clamps then loosen the bolts about1/4 turn
5.  Tighten the axle clamp bolts to spec, then loosen 1/4 turn
6.  Twist the handle bars until a piece of glass lays flat across the forks
7.  Tighten the top clamp bolt on the steering stem.
8.  Recheck the fork alignment with a piece of glass.
9.  Reinstall the front fender
10.  Tighten the bolts to spec.



I came to the conclusion that the top clamp does not clamp, so I undid all the triple tree
and "wiggled" it up so the steering stem is free and I put a shim, 0.05mm or 20"thou, around the steering
stem tube and then redid the whole process - and ... nothing, same result.

As soon as I do up one of the lower clamp bolts, it is out of alignment.


Any suggestions?

thank you so much

:)

Offline spotty

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Re: K2 Front fork trouble
« Reply #1 on: July 12, 2017, 05:18:56 PM »
bent / twisted triples ? have you tried holding the two triples together and see if all the holes line up?
i blame Terry

Offline HondaMan

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Re: K2 Front fork trouble
« Reply #2 on: July 12, 2017, 06:19:30 PM »
Where did they fork tubes come from? Are they undersized? It sounds like it, if you need a shim to make them tight. The triple tree holes are 0.1mm larger (0.004") ID than the fork tubes, so finger-tight on their bolts is usually enough to grip the tube. A shim of 20 thousandths is 1/2 (0.5) millimeter! That sounds like the forks are 34.5mm diameter?
« Last Edit: August 31, 2017, 07:20:11 PM by HondaMan »
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Offline 7fifty4

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Re: K2 Front fork trouble
« Reply #3 on: August 31, 2017, 06:50:24 PM »
thank you all - I have source a second hand triple tree, upper and lower and now all works  !!

Hondaman - you said the 0.5mm but I wrote 0.05mm  - sorry.
:)

Offline HondaMan

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Re: K2 Front fork trouble
« Reply #4 on: August 31, 2017, 07:20:50 PM »
Good job!
It sounds like maybe the old one was somehow damaged?
See SOHC4shop@gmail.com for info about the gadgets I make for these bikes.

The demons are repulsed when a man does good. Use that.
Blood is thicker than water, but motor oil is thicker yet...so, don't mess with my SOHC4, or I might have to hurt you.
Hondaman's creed: "Bikers are family. Treat them accordingly."

Link to Hondaman Ignition: http://forums.sohc4.net/index.php?topic=67543.0

Link to My CB750 Book: https://www.lulu.com/search?adult_audience_rating=00&page=1&pageSize=10&q=my+cb750+book

Link to website: www.SOHC4shop.com