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Bench sync
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- millerdog
- Gold Member
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- Joined: Sat Jul 21, 2007 8:57 pm
- Location: Concord NC
Bench sync
Can any one tell me why #3 throttle plate will not close all the way? All adjusting screws are backed out. It just will not close enough to cover the forward hole.
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1976 sorta stock GL 1000. 1997 VZ800 definitely not stock Suzuki Marauder. Ride em like you stole em!
- BlueThunder
- Platinum Member
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- Joined: Fri Nov 07, 2008 4:39 pm
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Re: Bench sync
Something is misaligned, misadjusted, bent, installed incorrectly or crud keeping it from functionally properly. An inspection would be in order to determine which of the aforementioned conditions exist.
...Brian
2014 CTX1300 Deluxe - BlackThunder aka Predator
1977 GL1000 - Ox
2014 CTX1300 Deluxe - BlackThunder aka Predator
1977 GL1000 - Ox
- flyin900
- Gold Member
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Re: Bench sync
Did you have them apart or the carbs split from the plenum? Check to see if the adjustment part is assembled correctly by comparing it to the other adjusters. There are two small washers that are on the lower threaded adjuster pin and one should be on each side of the little fixed fork where the adjuster goes through. It is easy to not put that back together correctly and end up with both washers on either side of the little fork assembly.
Something could be bent or misaligned as noted above, so it’s hard to know without some background on those carbs or work that was done.
Something could be bent or misaligned as noted above, so it’s hard to know without some background on those carbs or work that was done.
Current Bikes:
1966 CL77 - Honda 305cc - Dual purpose - "Gentleman's Scrambler" was a period moniker.
1967 CL175K0 - Low production number with #802 engine serial- winter 2019/2020 full restoration.
1972 CB350F - Baby Four with low mileage - Cosmetic refresh to the next level 2021/2022.
1978 CB550K - Very original bike with only 7499 Km. from new - light cleanup and refresh done.
1983 CB1100F - Canadian model - DOHC Supersport in pristine low kilometre condition from new.
1984 GL1200 - Standard model in showroom condition - two owner bike from new.
1984 CX650E - Restored summer 2017 - a rare Eurosport model - excellent one owner bike.
1966 CL77 - Honda 305cc - Dual purpose - "Gentleman's Scrambler" was a period moniker.
1967 CL175K0 - Low production number with #802 engine serial- winter 2019/2020 full restoration.
1972 CB350F - Baby Four with low mileage - Cosmetic refresh to the next level 2021/2022.
1978 CB550K - Very original bike with only 7499 Km. from new - light cleanup and refresh done.
1983 CB1100F - Canadian model - DOHC Supersport in pristine low kilometre condition from new.
1984 GL1200 - Standard model in showroom condition - two owner bike from new.
1984 CX650E - Restored summer 2017 - a rare Eurosport model - excellent one owner bike.
- millerdog
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- Joined: Sat Jul 21, 2007 8:57 pm
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Re: Bench sync
The sync adjusters are properly put together, and nothing appears to be bent. All the adjustments are backed off. A conundrum for sure.
1976 sorta stock GL 1000. 1997 VZ800 definitely not stock Suzuki Marauder. Ride em like you stole em!
- desertrefugee
- SUPER BIKER!!!!
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Re: Bench sync
I suppose it is possible the plate on the shaft is shifted. That would be unlikely ift he set has never been apart. In that case I would agree with the notion that something might be bent or damaged in the linkage.
- Life is not about waiting for the storms to pass. It's about learning to ride in the rain.
- millerdog
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- Location: Concord NC
Re: Bench sync
Well, I cleaned these carbs up real good. Layed a straight edge on the linkages, and everything is true. Lubed every junction there was. Finally got all the throttle plates set to cover the first hole in the moth of the carbs. Everything seems to be working perfectly. Bolted them back on the bike, and I still have the exact same problem. I guess I’ll double check the timing again. I really don’t know what else to do at this point.
1976 sorta stock GL 1000. 1997 VZ800 definitely not stock Suzuki Marauder. Ride em like you stole em!
- BlueThunder
- Platinum Member
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- Joined: Fri Nov 07, 2008 4:39 pm
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Re: Bench sync
From the ham fisted book... have you tried to bend (gently) the slide shaft to fit correctly?
...Brian
2014 CTX1300 Deluxe - BlackThunder aka Predator
1977 GL1000 - Ox
2014 CTX1300 Deluxe - BlackThunder aka Predator
1977 GL1000 - Ox
- ericheath
- Honored Life Member
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Re: Bench sync
Number three is the base carb. It is closed using the throttle stop screw. If your number three is that open, and you sync to it, the others will be that far open and —— a screamer at idle.
Set the number three first using the idle screw. You may need to back the other three carbs open for it to close, but it should close. Then bench sync the others to it.
Set the number three first using the idle screw. You may need to back the other three carbs open for it to close, but it should close. Then bench sync the others to it.
Whatever I suggest here should be given ample time for a moderator to delicately correct. I apologize in advance.
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
77 WING, 1200 engine with 77 heads, cams, gl1100 foot pegs, Magna V65 front end, 764A carbs, [-gone Suzuki M109 monoshock--, replaced with gl1100 shocks] gl 1200 swing arm, gl1500 final drive, wheel and rear brakes Valkyrie seat, Meanstreak tank, Sportster pipes, Power Arc ignition off crank.
77 Wing. black
83 Wing, in pieces
"Continuing education is important even if the subject matter is fairly useless (as in this case)."---Greg Foresi
- millerdog
- Gold Member
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Re: Bench sync
I’ll have another go at it when I get some more time. Very frustrating. LOL. I had to walk away from it today...
1976 sorta stock GL 1000. 1997 VZ800 definitely not stock Suzuki Marauder. Ride em like you stole em!
- Old Fogey
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Re: Bench sync
If you have the idle screw on the quadrant backed off and the synch screw between #1 and #3, and #2 and #4 the same , then the adjustment at #4 is to blame. The most common cause is the seizure of the adjuster brackets on the #4 carb. Take the synch screw right out and make sure that the brackets will move relative to one another.
If they do, we need to look elsewhere.
If not, sometimes some penetrating oil will get them moving. If that doesn't work the throttle spindle will need to come out and the brackets split manually to clean the movement up. The early alloy arm carb sets (75 -76) need to be stripped to do that; the later ones and the GL1100 can be removed with the carb still on the set.
If they do, we need to look elsewhere.
If not, sometimes some penetrating oil will get them moving. If that doesn't work the throttle spindle will need to come out and the brackets split manually to clean the movement up. The early alloy arm carb sets (75 -76) need to be stripped to do that; the later ones and the GL1100 can be removed with the carb still on the set.
"Impossible Is Just a Level of Difficulty!..."
If I'd wanted you to understand, I would have explained it better! (Johann Cruyff)
I’d give my right arm to be ambidextrous!
If I'd wanted you to understand, I would have explained it better! (Johann Cruyff)
I’d give my right arm to be ambidextrous!
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