Author Topic: Carb link pin and full open stop  (Read 45 times)

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Offline crashmaster

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Carb link pin and full open stop
« on: April 12, 2026, 09:43:41 AM »
CB750K2 with 657A carbs. Making the cable adjustments on my carbs. I’ve got everything adjusted as far as it will go to allow the most FreePlay. I can live with what I have but I wouldn’t mind a little bit more, and I’m kind of wondering why I don’t have more adjustment. I did have to replace the throttle plate when rebuilding these carbs, so there is a little bit of a variable. Pretty sure before rebuild did have some free play, but I have not ridden the bike prior to tearing into it. Just got it started to verify it would run.

Looking through the repair manual on page 195 and 196. At the bottom of page 195, there is an Overcross stop adjustment which addresses setting the gap on the eccentric link pin for a clearance of 2 to 3 mm between the throttle lever and the link pin. Then on page 196 at the bottom of the page, it says that the throttle lever should hit the link pin when the throttle is fully closed. So that’s one question. Although, either way, I doubt that has anything to do with my lack of FreePlay.

The other question is on page 196 there is a full open stopper adjustment. The stopper screws should be adjusted so that there’s a distance of about 33 mm between the top and the adjuster screw with a throttle in full open position. I’m not sure what that even does and what I would even be measuring here? 33 mm between the top of what?

Again, it probably has nothing to do with the FreePlay. Just wondering if they were Any other adjustments that I may be overlooking. Throttle response is smooth and not binding. But damn, they put a heavy return spring in these things!




Online newday777

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Re: Carb link pin and full open stop
« Reply #1 on: April 12, 2026, 09:56:36 AM »
I'm wondering if the cables have been replaced?
Stu
Honda Parts manager in the mid 1970s Nashua Honda
My current rides
1975 K5 Planet Blue my summer ride, it was a friend's bike I worked with at the Honda shop in 76, lots of fun to be on it again
1976 K6 Anteres Red rebuilding project, was originally my brother's that I set up from the crate, it'll breath again soon!
Project 750s, 1 K2, 4 K6, 1 K8, 1 F1, 1 F3
2008 GL1800 my daily ride and cross country runner

Prior bikes....
1972 Suzuki GT380 I had charge of it for a year in 1973 while my friend was deployed and learned to love street riding....
New CB450 K7 after my friend returned...
New CB750 K5 Planet Blue, demise by ex cousin in law at 9,000 miles...
New CB750 K6 Anteres Red, to replace the totaled K5, I sold this K6 at 45k in 1983, I had heavily modified it, many great memories on it and have missed it greatly.....
1983 GL1100A, 1999 GL1500 SE, 1999 GL1500A

Offline crashmaster

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Re: Carb link pin and full open stop
« Reply #2 on: April 12, 2026, 01:06:24 PM »
I replaced the bars with Euro bars, so the cables are obviously longer now. But operation is smooth

Offline grcamna2

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Re: Carb link pin and full open stop
« Reply #3 on: April 12, 2026, 02:47:42 PM »
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