Author Topic: K3 throttle rack bell crank  (Read 509 times)

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Offline MauiK3

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K3 throttle rack bell crank
« on: June 03, 2018, 04:48:10 PM »
I took my K3 750 out for a spin and on the way home I noticed my throttle had developed some pretty serious lost motion, by the time I got home it would barely open, I just made it.
What happened is the screw that tightens the cable bell crank to the shaft on the rack loosened, my fault I think, I didn't check it closely enough.
I removed the tank, took the little bolt out of the bell crank, got a fresh bolt, flattened the end with a file so it had maximum contact, cleaned all the threads and put in some blue lock tight. It's all back together and should work fine. If it ever happens again I'm going to remove the rack and drill a slight depression in the shaft, it's just a flat spot now.

And by the way, I have nice supple 5.5 mm fuel lines and new little wire clips. Those things are a bear to maneuver off and on. I have several c clip pliers and none seem to work well, I always have to struggle with those darn things, I have to come up with a better way!

1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline American Locomotive

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Re: K3 throttle rack bell crank
« Reply #1 on: June 03, 2018, 05:13:04 PM »
A Japanese company makes a great set of clip pliers, but I can't for the life of me remember who made them. I believe I saw them for sale on the Ninja Tools e-bay store.

Offline MauiK3

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Re: K3 throttle rack bell crank
« Reply #2 on: June 05, 2018, 08:37:29 AM »
Wow, that site has so many pliers!!
You wouldn't happen to remember what they looked like would you?
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline American Locomotive

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Re: K3 throttle rack bell crank
« Reply #3 on: June 05, 2018, 01:42:01 PM »
IIRC, they had wide flat jaws with a punch of square pegs so they would the clips would sort of slot into them and lock into place.

Edit: Found them https://www.ebay.com/itm/KTC-HOSE-CLIP-PLIERS-AUTOMOTIVE-TOOL-AE931-MADE-IN-JAPAN/183230950301?hash=item2aa96a6b9d:g:WqUAAOSw8i9aXtjT

Offline MauiK3

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Re: K3 throttle rack bell crank
« Reply #4 on: June 05, 2018, 02:45:17 PM »
Thank you!
1973 CB 750 K3
10/72 build Z1 Kawasaki

Offline 754

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Re: K3 throttle rack bell crank
« Reply #5 on: June 05, 2018, 05:09:38 PM »
Try a 90 degree pick in the hole and turn it sideways. The Honda ones would come off with your fingers.
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Offline ekpent

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Re: K3 throttle rack bell crank
« Reply #6 on: June 06, 2018, 04:17:52 AM »
Try a 90 degree pick in the hole and turn it sideways. The Honda ones would come off with your fingers.
Yep- I just walk them up the line with a pick one 'leg' at a time.