Awakening a 20 year sleeper.

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gltriker
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Re: Awakening a 20 year sleeper.

Post #61 by gltriker » Thu Jun 08, 2017 10:30 pm

robin1731 wrote:
Whiskerfish wrote:try taking your screws out another half or even a full a turn each



Yes, I've never had one that liked them in that far

.

in full agreement. ;)
Although I have experience with only one set of GL carburetors, those on my trike, it was very apparent that Honda's listed baseline pilot screw adjustment setting, is too lean.
As Whiskerfish and Robin have advised, enrichen the pilot mixture screws from that "factory spec"and learn how the idle drop procedure, in concert with carburetors' synchronization process, helps to refine each of the 4 individual carburetors pilot fuel ("hot" engine idle state) delivery requirements. tumb2
Last edited by gltriker on Thu Jun 08, 2017 10:54 pm, edited 1 time in total.
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Re: Awakening a 20 year sleeper.

Post #62 by Don R » Thu Jun 08, 2017 10:42 pm

Thanks,
I went 2 turns out but ran out of time and sunlight to do the idle drop. I gassed it up and rode a little, I would like to say it's better but it might be wishful thinking. The idle speed is up to 2K so that's an improvement.

I can't wait until I love this 78 as much as I did the old black 79. It is prettier, I plan on a couple thousand mile trip in Aug. I'd hate to have to take a 750. L0L!

My 79 had 83 carbs, in the old days they thought it was a speed secret.
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
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Re: Awakening a 20 year sleeper.

Post #63 by Whiskerfish » Fri Jun 09, 2017 7:16 am

Personally I like my idle about 1050 - 1100. 2k is too high you need to adjust the idle screw.
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Re: Awakening a 20 year sleeper.

Post #64 by robin1731 » Fri Jun 09, 2017 7:21 am

Whiskerfish wrote:Personally I like my idle about 1050 - 1100. 2k is too high you need to adjust the idle screw.



Yeah, getting first gear at that rpm probably won't sound nice. ;)

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Re: Awakening a 20 year sleeper.

Post #65 by Don R » Fri Jun 09, 2017 11:02 am

I get that 2K is too high, I wasn't going to leave it there. It got dark and late so I didn't adjust any more, the point is that the idle went up so I'd assume the engine was happy with the adjustments so far, Thanks for the help. I like to assume I'm a reasonably intelligent guy but there are a lot of things you guys have more experience with and I do appreciate the tips.
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.

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Re: Awakening a 20 year sleeper.

Post #66 by jdvorchak » Mon Jun 12, 2017 12:08 pm

At 2k RPM it's not in the idle circuit. You'll have to drop it to below 1200 and do the idle drop again and sync. May have to do the idle drop and sync 2 or 3 more times. Maybe not. You want to end up with 1000 to 1100 rpm smooth idle and little to no hesitation off idle.
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Previous bikes: 84 GL1200 STD, 83 KZ550LTD, 83 CB1000, 78 CB400A, 82 CB900F, 79 CB750K, 2001 GL1800, 2000 Dyna Super Glide, 1972 CB350 K4, 1985 GL1200A, 1997 1200 Sportster, 84 GL1200I, 82 Honda CM400E, 81 Suzuki GS650L, 72 Triumph Bonneville 750, 72 Honda CB350, 66(?) Honda 305 Scrambler, 6? Yamaha yz250, 62 650 Matchless (Norton-Villers).
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Re: Awakening a 20 year sleeper.

Post #67 by ericheath » Mon Jun 12, 2017 12:37 pm

Interesting side note, this morning I was warming my bike up. With no choke it was missing a bit on one side so I messed with idle screws. I've never touched them before except at idle. At 2000 rpm it affects the idle quality much more than at idle. Granted, this is on my hybrid.
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Re: Awakening a 20 year sleeper.

Post #68 by Don R » Thu Jun 15, 2017 11:37 am

I dropped the idle and with more adjusting and riding, it seems to be improved, I'll keep after it.
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.

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Re: Awakening a 20 year sleeper.

Post #69 by jdvorchak » Fri Jun 16, 2017 7:53 am

Trying to sync multiple carbs by ear is an exercise in futility. Yes you can tweek them a little and make it "sound good" but the only to get it right is to use sync gauges at idle speed.

Also trying to sync carbs without first making absolutely sure the ignition timing is spot on, mechanical or vacuum advance is free and working properly, the valve lash to spec and belt timing marks correct, is just a waste of time. Once the engine mechanicals are perfect then is the time to sync.
New users please visit our "Shop Talk" for common tips and help:
http://ngwclub.com/forum/page/ST


Don't fix it 'til it's broke...
The person with the most toys wins!
If it has wheels or a skirt you can't afford it.
Amateur Radio Station WW9L

71 CL350 with Bingham side car
2010 HD Ultraglide Classic Limited
2008 HD Dyna Low Rider
83 KZ1100L1 Shaft
83 KZ550LTD Shaft

Previous bikes: 84 GL1200 STD, 83 KZ550LTD, 83 CB1000, 78 CB400A, 82 CB900F, 79 CB750K, 2001 GL1800, 2000 Dyna Super Glide, 1972 CB350 K4, 1985 GL1200A, 1997 1200 Sportster, 84 GL1200I, 82 Honda CM400E, 81 Suzuki GS650L, 72 Triumph Bonneville 750, 72 Honda CB350, 66(?) Honda 305 Scrambler, 6? Yamaha yz250, 62 650 Matchless (Norton-Villers).
John

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Re: Awakening a 20 year sleeper.

Post #70 by Don R » Wed Jun 28, 2017 12:43 am

She's a bagger again, so far I left the trunk off. I made a nice set of Vetter bags from two sets. One with matching doors, one with good condition bodies. I also put on a luggage rack, just for my vacation trip, when that's done it will go back half naked again.

A friend that has a shop offered me a set of known good gl1100 carbs for a test and I could run them while mine are being cleaned again by a pro. (him).
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.

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Re: Awakening a 20 year sleeper.

Post #71 by Don R » Sun Jul 02, 2017 9:40 pm

Update--
For some reason the windjammer had a different key so I traded the lock cylinder from the trunk to it and tightened up the lower mounting tab. Now I only need two keys unless I decide to put the trunk back on. With the stock turn signals back on I'm going to wire up the drag specialties lights up to work as additional brake and tail lights. I got a pack of misc. glass fuses since the taillight and instrument fuse blew, and replaced the dogbone fuse with a blade fuse.
Just tuning and getting it the way I want it. The charging system plug looked good so I cleaned the contacts and added some di-electric grease and just plugged it back in.
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.

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Re: Awakening a 20 year sleeper.

Post #72 by Don R » Fri Aug 25, 2017 1:32 am

Old Blue got a random miss in second or third gear, mid rpm's. I checked the plug caps, wires and coils, looked OK. I borrowed a known good set of 1100 carbs, it got worse. I replaced the plug caps and separated the wires, it was great. I rode to Sturgis and it ran awesome. I got home put my carbs back on and the miss came back, I separated the wires and slipped plastic covers over them and after a warm up it's running good again. Not 100% but way better. I ran it in the dark with the airbox off and can't see any spark leak, I'm thinking coils and wires and eventually a dyna or Hondaman transistor ign. Opinions on coils? I'm considering used gl1500 or new 5 ohm dynas. What's the hot ticket?
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.

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Re: Awakening a 20 year sleeper.

Post #73 by CYBORG » Fri Aug 25, 2017 7:41 am

The "HOT" ticket would be a C5 ignition
1978 custom GL1000
1977 custom with 1200 engine
1985 gl1200

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Re: Awakening a 20 year sleeper.

Post #74 by Don R » Fri Aug 25, 2017 12:07 pm

It's odd how this comes and goes. Just when I think I got it,,,,, nope.
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.

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Re: Awakening a 20 year sleeper.

Post #75 by Don R » Sat Sep 09, 2017 11:16 pm

It's a big time dead cylinder now, I'll pull the plugs tomorrow but in the meantime, I ordered a dyna ign. and a set of gl1500 coils. My buddy with the bike shop may go through my carbs again. Shotgun approach, it uses a little oil, I'm hoping the plugs look OK. After Sturgis the gas tank got really cleaned out and I removed the extra fuel filter. I'll check fuel press and flow also.
78 GL 1000, 70 CB750 sandcast, 70 CB836 hot rod, 1124cc 750 dragbike resto project.
You don't need a weatherman to know which way the wind blows.


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