'75 GL1000 My engine will only run with the starter button pushed in


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randyrogge
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Joined: Tue May 07, 2019 9:14 pm
Location: Atwater, CA
Motorcycle: 1975 Honda GL1000

'75 GL1000 My engine will only run with the starter button pushed in

Post by randyrogge » Sat Jul 06, 2019 10:57 pm



Hi,

A few months back, I was riding my GL1000 and my timing belt broke. Now after installing new valves and hopefully getting the valve timing correct. The bike will start and stay running only when the starter button is held in and laying on the throttle. Immediately after you release either one the engine will die. I'm not a mechanic by nature, so I would apprciate any help or pointed in the right direction. Thanks

Here is what I've done so far.

New timing belts
Replaced bent valves
Valve timing
Changed engine coils (OEM)
New plugs
I have spark



winguyjo
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Re: '75 GL1000 My engine will only run with the starter button pushed in

Post by winguyjo » Sat Jul 06, 2019 11:31 pm

this would be a good time to check compression.

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Maz
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Motorcycle: 1975 GL1000K1
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Re: '75 GL1000 My engine will only run with the starter button pushed in

Post by Maz » Sun Jul 07, 2019 2:32 am

randyrogge wrote:
Sat Jul 06, 2019 10:57 pm
Hi,

A few months back, I was riding my GL1000 and my timing belt broke. Now after installing new valves and hopefully getting the valve timing correct. The bike will start and stay running only when the starter button is held in and laying on the throttle. Immediately after you release either one the engine will die. I'm not a mechanic by nature, so I would apprciate any help or pointed in the right direction. Thanks

Here is what I've done so far.

New timing belts
Replaced bent valves
Valve timing
Changed engine coils (OEM)
New plugs
I have spark
You may have dislodged a connector.
Check the ballast resistor on the coils. When start button is pressed, the resistor is by-passed and full 12v is fed to the coils to give a stronger spark while the starter is spinning . When you release the button, voltage to the coils is diverted through the resistor. If resistor is faulty or disconnected, no spark = no run.
Maz
Ironically, Common Sense is the LEAST common of all senses!

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DenverWinger
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1980 GL1100 STD Vetter (2005-)
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1972 CL350 (1980-1988) sold
1978 Suzuki GS550 (1985-2005) sold
1977 GL1000 (2002-2006) sold

Re: '75 GL1000 My engine will only run with the starter button pushed in

Post by DenverWinger » Sun Jul 07, 2019 7:13 am

+1 on the compression check. I'd also revisit the valve lash adjustments.
♫ 99 Little Bugs in the Code, ♪
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dingdong
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Motorcycle: 1976 gl1000
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Re: '75 GL1000 My engine will only run with the starter button pushed in

Post by dingdong » Sun Jul 07, 2019 7:42 am

Maz is correct. Ballast resistor is disconnected or bad.
Tom

"Molon Labe"

John F. Kennedy would be impeached by todays liberal Democratic socialist party.

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Overdog
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Motorcycle: 83 Goldwing Interstate

Re: '75 GL1000 My engine will only run with the starter button pushed in

Post by Overdog » Tue Jul 09, 2019 5:22 pm

Yep...ballast resistor. Anyone who owned old Mopars probably changed a few.....



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