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Saving a '81 KZ750-E
- calum
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04 Jun 2023 12:36 #885619
by calum
Current Project:
www.kzrider.com/forum/11-projects/616901...-spare-parts-project
1977 KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
Replied by calum on topic Saving a '81 KZ750-E
Oh, then no worries - you'll be out for a drive next weekend, eh?
Current Project:
www.kzrider.com/forum/11-projects/616901...-spare-parts-project
1977 KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
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- Skidmark
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04 Jun 2023 15:59 #885630
by Skidmark
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
Replied by Skidmark on topic Saving a '81 KZ750-E
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
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15 Jun 2023 09:51 #886005
by Skidmark
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
Replied by Skidmark on topic Saving a '81 KZ750-E
I finally got the replacement fuses. All appears to be fine now. I got two extra fuses in case the last one went bad due to other reasons than age. At least that way I should be able to make it home on my own. I am going for my first mountain ride today up around Lake Tahoe. I have laid out a loop that's about 50 miles or so. First time on the twisties!
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
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- Skidmark
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15 Jun 2023 12:30 #886012
by Skidmark
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
Replied by Skidmark on topic Saving a '81 KZ750-E
Hopefully I will make it home under power instead of a trailer sometime. It ran great for 30 miles, now it's barely running. Sounds like fuel starvation.
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
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- calum
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16 Jun 2023 02:21 #886025
by calum
Current Project:
www.kzrider.com/forum/11-projects/616901...-spare-parts-project
1977 KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
Replied by calum on topic Saving a '81 KZ750-E
Current Project:
www.kzrider.com/forum/11-projects/616901...-spare-parts-project
1977 KZ1000 Restomod ( www.kzrider.com/forum/11-projects/614517-1977-kz1000-restomod )
1980 KZ750H ( kzrider.com/forum/11-projects/612054-kz750h-restoration )
2000 BMW F650GS
The following user(s) said Thank You: Skidmark
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- Skidmark
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16 Jun 2023 10:51 #886039
by Skidmark
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
Replied by Skidmark on topic Saving a '81 KZ750-E
I took off the tank and drained the float bowls. A normal amount of fuel came out, leading me to believe none of the float needles are stuck closed. There was a small amount of particles in the fuel filter, but not enough to show serious concern. When I blew through it, it seemed a bit restrictive, though. I blew through a new one, then back to the one that was on the bike. Once the old one was dry, it seemed to have the same restriction as the new one. When it had some fuel in it, the first blow through seemed more restrictive. There is no direction of flow anywhere on these filters. Is this too cheap of a filter? Is there better ones out there rated for a higher flow? I chose this type so I could easily see any debris coming from the tank. The only things left I can think of doing is to drain the tank and pull the Pingel petcock, and pull the carbs and remove the float bowls and inspect the inside of the carbs. The petcock is flowing full force in both main and reserve positions, so I don't think it's screens are being blocked. That just leaves the pulling the carbs and float bowls. Thoughts?
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
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- Skidmark
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16 Jun 2023 11:46 - 16 Jun 2023 11:47 #886040
by Skidmark
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
Replied by Skidmark on topic Saving a '81 KZ750-E
I may be barking up the wrong tree. I decided to pull the spark plugs and do a compression test. I have around 100 miles on this fresh motor, so I thought it would be good to check. From #1 to #4 the readings are 120, 120, 130, 130. That doesn't seem abnormal to me for a new motor with so few miles. I did find, however, that the #2 and #3 spark plugs were fouled. When the bike started running poorly, I was going down a fairly steep stretch of road and did some decelerating on the motor. Why would only the #2 and #3 plugs foul? I have brand new Dyna coils (3.0 ohm, green), but both of those cylinders are on the same coil. Is it possible for a new coil to fail? Is there a method for testing to see if the coil is still good with a multimeter?
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
Last edit: 16 Jun 2023 11:47 by Skidmark.
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- Scirocco
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- Never change a running system
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16 Jun 2023 11:49 #886041
by Scirocco
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
Replied by Scirocco on topic Saving a '81 KZ750-E
Fuel filter don´t like those kind of hose clamps. You will deform the filter connector pipe and restric the fuel flow.
Only use spring circlip clamps or special fuel hose clamps.
Only use spring circlip clamps or special fuel hose clamps.
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
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16 Jun 2023 11:53 #886042
by Scirocco
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
Replied by Scirocco on topic Saving a '81 KZ750-E
Cyl. 2 and 3 running to rich, choke or enricher circuit not fully closed?
My 1975 Z 1 B 900 Project
www.kzrider.com/forum/11-projects/605133...ears-deep-sleep-mode
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- Skidmark
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16 Jun 2023 12:15 #886043
by Skidmark
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
Replied by Skidmark on topic Saving a '81 KZ750-E
So just a coincidence both fouled plugs are on the same coil? The choke seem to operate smoothly. Enricher circuit? As far as I know the choke lever only closes the butterflies. No other mechanical connection to the choke lever on Keihin CV34's.
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
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- Gertch
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16 Jun 2023 12:25 #886044
by Gertch
Wish I could remember half of what I've forgotten
'81 KZ750 E2
Replied by Gertch on topic Saving a '81 KZ750-E
Pulled this from Dyna website to test coils
Wish I could remember half of what I've forgotten
'81 KZ750 E2
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16 Jun 2023 12:42 #886045
by Skidmark
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
Replied by Skidmark on topic Saving a '81 KZ750-E
I went to test the coils, and I found one of the wires broken. I think I found my smoking gun!
Retired gearhead
'81 KZ-750 E2
'87 Suzuki Savage 650 Street Tracker (lost in the shop fire)
The following user(s) said Thank You: Nessism, Wookie58
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