Awakening a 20 year sleeper.

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Don R
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Re: Awakening a 20 year sleeper.

Post #46 by Don R » Mon Mar 20, 2017 5:27 pm

I got in a nice 15 mile ride today, I rode to the gym, worked out and then went around the local 4 lane bypass. I got her up to 80 for a few miles and broke in the new tires. The rear brake took a few pumps to get working. It has some new pads so I took it easy on the stops. Everything was nice and smooth and it sounded right. The tach is sluggish, but seems to be loosening up, the cable may have been broken for years before it was parked for 20. I put on a loud turn signal clicker and after a few more miles the beeper began to beep, so far only three times before taking a rest but it beeps for either side.

When I got home I had to turn the idle down about a thousand rpm. The starter clutch worked every time after an initial scare last week. I think I made a good choice to trade the 79 for this 78.
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.

Don R
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Re: Awakening a 20 year sleeper.

Post #47 by Don R » Tue Mar 21, 2017 12:18 am

I have a set of K7 cb750 handlebars. I'm considering a swap, these seem very tall and all the cables and wires seem to be puled tight. I really like the euro bars on my cb750 K1 a little too low for a cruiser though.
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.

Don R
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Re: Awakening a 20 year sleeper.

Post #48 by Don R » Wed Mar 22, 2017 12:38 am

She only starts in neutral, I assume I need to troubleshoot the clutch switch. It there a logical place to start?
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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gltriker
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Re: Awakening a 20 year sleeper.

Post #49 by gltriker » Wed Mar 22, 2017 2:44 am

The clutch switch/wires assembly is located in the housing where the clutch hand lever is mounted to. You will find a looong 2 wires lead coming out of that housing routed towards the shelter. Unplug those 2 wires lead male connectors from their respective female harness connectors and check for continuity through those same male clutch switch wire connectors with your always handy ohmmeter. ;)

With the clutch lever in the clutch engaged position, you should find a reading of almost infinite resistance: an open circuit.
With the clutch lever in the clutch disengaged position, you should find a reading of almost zero resistance; a closed (or completed) circuit. It is a plastic plunger type switch that slowly became very sensitive to clutch lever position on my trike.

If you find the switch isn't operating correctly, the clutch switch/wires assembly is still available through the Honda OEM parts system. Around $10. I'd advise you to proactively replace it anyway. The OEM Honda part number is 35340-329-003

Let us know what you find.

If needed, We can give you further information about its replacement procedure. tumb2
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Don R
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Re: Awakening a 20 year sleeper.

Post #50 by Don R » Wed Mar 22, 2017 11:37 am

Simple enough, thanks. I assumed I'd need to find and source a diode somewhere, I'll start with the switch There is a same year 750 here, I might even be able to rob a part from it. lol.

The part is cheap enough to buy a new one anyway.
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.

Don R
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Re: Awakening a 20 year sleeper.

Post #51 by Don R » Sat Apr 08, 2017 11:43 pm

We rode about 70 miles today and everything worked perfectly, the turn signal beeper beeped a little more than last time. With my loud clicker I don't miss it anyway. I had the windjammer and lowers on, the engine heat was nice in the evening. A little startup smoke but it was running clean after a warm up.

Thanks for all the help getting her back on the road.
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 #52 by Whiskerfish » Sun Apr 09, 2017 7:56 am

Awesome action1 action1 action1 action1
"Agreement is not a requirement for Respect" CDR Michael Smith USN (Ret) 2017
"The book is wrong, this whole Conclusion is Fallacious" River Tam
2008 GL1800 IIIA "TH3DOG"
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
and a whole garage full of possibilities!!

Psst. oh and by the way CHANGE YOUR BELTS!!!!

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Re: Awakening a 20 year sleeper.

Post #53 by chewy999 » Sun Apr 09, 2017 8:31 am

+1 :crosso

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Previous Rides,
1980 CB250N Good to learn on
1981 CX500 good mid range tourer, went to Austria on it!
1983 GL1100C Pride and joy, sold when I bought my 1st house, big mistake
1985 GL650 Silverwing another mistake, horrible bike
1986 CBX550 Good commuter
1989 Suzuki GS750 (1976) cheap and cheerful until a dog ran out in front of me on Xmas Eve, 1991
Current bikes
2010 CB1300 back on a bike after 19 years, two divorces, children grown up etc
1980 GL1100 NOW ON THE ROAD, still use CB1300.

Don R
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Re: Awakening a 20 year sleeper.

Post #54 by Don R » Thu Jun 01, 2017 3:26 pm

Well she developed a miss that continued to get worse, I had a batch of bad gas and assumed it was carb related in spite of two new inline filters. Today I pulled the carbs for cleaning and as they came out I noticed the band clamps are loose. Shame on me. As tight as the intakes are I wouldn't think they would leak much but obviously there is the poor performance.

I'll clean them again anyway since they are out and be sure to re-install properly. Moral of the story, don't do that.
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.

Don R
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Re: Awakening a 20 year sleeper.

Post #55 by Don R » Thu Jun 01, 2017 11:49 pm

Aw jeez, I put the #1 float bowl on the wrong carb, no wonder that air cutoff hose won't reach. Here I go again. Gets confusing when you flip them over, don't do that either.
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.

Don R
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Re: Awakening a 20 year sleeper.

Post #56 by Don R » Wed Jun 07, 2017 11:30 pm

The big miss is cured, it's still a little ragged at lower rpm's, Pulls smooth and goes down the road OK. I still haven't adjusted the lash or re-checked timing and point gap since I filed and polished the points a little. I put new condensers on the 79, but I haven't on this one yet. I'm considering a Dyna just because good points and condensers are close to the same price as a new Dyna on ebay.
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.

Don R
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Re: Awakening a 20 year sleeper.

Post #57 by Don R » Thu Jun 08, 2017 3:49 pm

Carbs clean, air filter new, Leakdown is excellent, more new plugs the old ones are a nice light tan color, 300 mile oil & filter change to get the MMO out and further flush any old oil, valve lash was really good, Rocker covers clean inside, I forgot to look for the oil screen. Static timing is spot on, point gaps are a couple thou tight. I still want to check dynamic timing to be sure the advancer is working, No point sparking to speak of. Now to see if the low speed miss is cured.
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.

Don R
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Location: West Central Illinois

Re: Awakening a 20 year sleeper.

Post #58 by Don R » Thu Jun 08, 2017 7:31 pm

Nope still there, I cut back the coil wires at the ends, measured 15K ohms across the coil wires 1-2, 3-4. Each plug cap is just under 5K ohms. My meter only reads up to 20K so I get no reading across all of them assembled. I'm back to the carbs again. The screws are 1 1/4 turns out, It still runs good at higher rpm's and possibly a small improvement in the low rpm smoothness after all the work.
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 #59 by Whiskerfish » Thu Jun 08, 2017 8:59 pm

try taking your screws out another half or even a full a turn each
"Agreement is not a requirement for Respect" CDR Michael Smith USN (Ret) 2017
"The book is wrong, this whole Conclusion is Fallacious" River Tam
2008 GL1800 IIIA "TH3DOG"
1975/6/7/8/9 Arthur Fulmer Dressed Road bike
1975 Naked Noisy and Nasty in town bike
and a whole garage full of possibilities!!

Psst. oh and by the way CHANGE YOUR BELTS!!!!

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Re: Awakening a 20 year sleeper.

Post #60 by robin1731 » Thu Jun 08, 2017 10:12 pm

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.

.
1975 GL1000 parts bike (parts for sale)
1976 Goldwing Super Sport
1985 Honda Elite
1976 KZ900 Dragbike
1992 ZX7 Dragbike (KZ900 style motor w/NOS)
and a rotation of various purchases
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