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Hard to start - interesting problem - solved
- JR
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20 Jul 2011 23:27 - 20 Jul 2011 23:28 #464055
by JR
1980 kz750E1, Delkevic exhaust
Hard to start - interesting problem - solved was created by JR
Just thought I would post this on the off chance it might help someone else.
The Beast, my 1980 kz750/4 E1 has always been easy to start but 2 weekends ago it was suddenly a bugger to get going. Same again last weekend and I was thinking oh well it has been really hot and maybe the gas all evaporated from the bowls and I didnt have it on prime for long enough but last night I made sure it was primed long enough and it was still a bugger.
I checked the spark, cleaned the plugs, checked the plug caps, checked for fuel in the bowls but to make a long story short I found the choke was not not working. CV34 carbs. I rolled back the #1 airbox to carb hose and could see that when I moved the choke lever the choke flap/butterfly did not budge. Took the carbs off tonight and brushed some road grime off the choke linkage and put a dab of oil on the spring and linkage and now all is well and I can hear that little "slap" when the choke flap/butterfly valve fits into place.
Might be something to check if anyone suddenly gets hard start issues.
Always something interesting with these old bikes.
The Beast, my 1980 kz750/4 E1 has always been easy to start but 2 weekends ago it was suddenly a bugger to get going. Same again last weekend and I was thinking oh well it has been really hot and maybe the gas all evaporated from the bowls and I didnt have it on prime for long enough but last night I made sure it was primed long enough and it was still a bugger.
I checked the spark, cleaned the plugs, checked the plug caps, checked for fuel in the bowls but to make a long story short I found the choke was not not working. CV34 carbs. I rolled back the #1 airbox to carb hose and could see that when I moved the choke lever the choke flap/butterfly did not budge. Took the carbs off tonight and brushed some road grime off the choke linkage and put a dab of oil on the spring and linkage and now all is well and I can hear that little "slap" when the choke flap/butterfly valve fits into place.
Might be something to check if anyone suddenly gets hard start issues.
Always something interesting with these old bikes.
1980 kz750E1, Delkevic exhaust
Last edit: 20 Jul 2011 23:28 by JR.
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- testarossa
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20 Jul 2011 23:31 #464056
by testarossa
1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN
Replied by testarossa on topic Hard to start - interesting problem - solved
Excellent tip. I had a similar issue on a set of VM26's. The set screw had backed out on one of the little actuator arms. That particular plunger wouldn't move at all. Trying to start with three chokes on and one off does make things interesting.
1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN
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- MFolks
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20 Jul 2011 23:35 #464057
by MFolks
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
Replied by MFolks on topic Hard to start - interesting problem - solved
Put a drop of Blue Loctite #242 on the setscrew and it won't vibrate loose, but will come off with tools. The Red Loctites for the most part need about 350F to loosen up, so unless you're applying heat on parts, it's kinda like forever.
1982 GPZ1100 B2
General Dynamics/Convair 1983-1993
GLCM BGM-109 Tomahawk, AGM-129A Advanced Cruise Missile (ACM)
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- testarossa
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20 Jul 2011 23:39 #464059
by testarossa
1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN
Replied by testarossa on topic Hard to start - interesting problem - solved
Yep, I put some blue on those screws. I hate red loctite. That stuff will make a bolt fight all the way out to the last thread. I know it has it's uses, but boy it's tenacious.
1978 KZ1000 A2 Click--->Build Thread
2004 ZX-10R
2007 Harley Sportster 1200
2020 Harley Street Glide Special
Angola, IN
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- KZ_Rage
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- Kentucky Bourbon Barrel Ale
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21 Jul 2011 00:02 #464066
by KZ_Rage
1979 KZ1000E1 SOLD!
1984 KZ550F2 SOLD!
2006 ZG1000A6F (Totaled)
2001 ZRX1200R (Sold)
2001 Sprint 955i ST (daily rider)
Replied by KZ_Rage on topic Hard to start - interesting problem - solved
+3 on no red loctite, it can gall threads on aluminum as it is basically like ceramic once it hardens
1979 KZ1000E1 SOLD!
1984 KZ550F2 SOLD!
2006 ZG1000A6F (Totaled)
2001 ZRX1200R (Sold)
2001 Sprint 955i ST (daily rider)
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