sticking 2-4 synchronizer linkage 'fix' ; attributed to PISTOL PETE <<AND>> MAURY, TOO!!

[gltriker]

Didn't know what other catchy words might be used to locate by search title this gem of 2016 Pistol Pete carburetion mystery sleuthing . not related to Randakk's mispositioned special flat washers tech tip.
maury is the Club member you must thank for this original Topic

https://ngwclub.com/forum/viewtopic.php?f=1&t=61242

maury aptly termed it, the 'Mysterious Honda High Idle Problem"

[pidjones]

Pete was a true gentleman.

[Sidecar Bob]

I wish I had seen that when it was posted. I started experiencing a similar issue on July of the same year but nobody had any suggestions that worked. In September (not long before Maury posted his solution) I I came back to that thread to say that I had learned that I could "fix" the issue temporarily by pushing on an adjuster screw.
viewtopic.php?f=1&t=60859&p=672149&hili ... ot#p672149

The issue has persisted after replacing the engine so I was pretty sure it was a carb linkage but I went over then several times and couldn't find anything and concluded that it was just because they were old and worn. I have bookmarked Maury's thread so I can try Pete's solution when I eventually get Mr.H out of storage.

[Fred Camper]

I added Maury's post to ShopTalk under the Carb sync section and called it Mysterious Honda High Idle Problem. Nice to have it captured. Thank you Cliff for digging it up again. (edit by Fred on Cinco DeMayo 2023)

[gltriker]

[gltriker]

[Sidecar Bob]

Me too. If it is the same thing mine does I wouldn't call it "dancing". It idles normally when cool and then increases (almost as if the choke's high idle was engaged) when hot.

[maury]

I'm famous !!

[gltriker]

I'm famous !!

YES! YOU ARE !!!

[Sidecar Bob]

I finally remembered to try this when the bike was warmed up on Sunday. I am amazed at how much difference such a quick & easy procedure made.
I went for to visit a friend yesterday; It was very hot for October (high 20s) and the engine was well & truly warm after the half hour ride each way but every time I released the throttle it returned to idle the way it should.
Thanks again Maury for telling us about it and Cliff for reminding us.

[gltriker]

Post #11

Cool Bob!

If my fellow members been have following my long winded reawakening of my 1975 GL1000 thread, with '76 LTD carburetors I had installed around August, 2017, I was troubled with the last carburetors dynamic synchronizing session (Sept. 28th) because the #3 carburetor vacuum gauge was displaying very big vacuum numbers ~12in/hg. I found the #1 to #3 synchronizer link adjusting screw was bringing the #1 carburetor's initial vacuum reading of~8in/hg closer to #3's , but the small compression spring soon became completely compressed into a coil-on-coil bind. hmmmm... what's going on?

Although I've spoken of the LTD 'rack' #2 and #4 synchronizer link's 'fork' was discovered soon after I adopted the 'rack' to be twisted out of shape-I believe to idiotically reposition the special washers on either side of the 'fork' - at some time before I purchased the "rack" in August 2017, I was successful to bend the synchronizer link 'fork' back where I thought it had been at the time of manufacture. ViseGrips bending effort was involved. I worried the throttle shaft would surely bend, if not break off, altogether. It didn't, and I was very fortunate to only have to replace the badly bent adjuster screw. Of course I needed to readjust the 'repaired' #2 to #4 synchronizer link and performed a dynamic session with my 4 vacuum gauges panel. The left bank carburetors' balance adjustment was accomplished without incident. I don't recall having to make any readjustments on the right bank, #1 and #3 carburetors, though.

Where I'm going with this is, I finally figured out, today, the #1 to #3 synchronizer link 'fork' and its complementing screw adjusting bracket had received the same idiotic short cut treatment. That meant I had to put the ViseGrips to work on both carburetor's throttle shaft synchronizer link segments this afternoon. The ViseGrips performed flawlessly. The throttle shafts are not damaged. I have confidence the #1 and #3 carburetors will now synchronize, correctly.

20231003_162724.jpg

Here's my point ---
If a fellow is hesitating to use Pistol Pete's miraculous synchronizer linkage "fix" because they worry a little tweak of that 'fork' might damage its carburetor throttle shaft, from my 6 years apart, firsthand experiences with man-handling my LTD spec carburetors' #2 to #4, and #1 to #3 twisted synchronizer link brackets back to shape, with ViseGrips, I would heartily recommend you do the flat blade screwdriver minor tweak to "fix" your engine's "Mysterious Honda High Idle Problem", too.

20231003_163552.jpg