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High RPM Miss KZ440
- ajsfirehawk
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10 Nov 2015 17:55 #698146
by ajsfirehawk
79 KZ650 SR
80 KZ1000 Z1 Classic
83 KZ1100 LTD
Z900RS
23 Mach 1
High RPM Miss KZ440 was created by ajsfirehawk
I've got a box stock 1981 KZ440 LTD with only 12K miles on it. It just started exhibiting a new problem. Right at 7K rpm I starts to miss. I really haven't dug into the problem. I did just pull the spark plugs and they look great. The service history is unknown to me. My son and I have driven the bike about 700 or 800 miles without issues until this cropped up. I can't tell if it is spark break up related to coils or bad plugs wires. Also could be a lean condition do to a new issue in the carbs/fuel system. I have not checked the valve clearances and don't know if they have ever been adjusted.
I have pulled, cleaned and lightly lubed the ignition advance mechanism. Last items, the bike does seem to take a long time to warm up, I'd say a full four minutes before it will run off choke. For the first time I also got a backfire when I throttled up to pull into the garage today after a 5 mile ride. Thoughts for what you would go after first?
I have pulled, cleaned and lightly lubed the ignition advance mechanism. Last items, the bike does seem to take a long time to warm up, I'd say a full four minutes before it will run off choke. For the first time I also got a backfire when I throttled up to pull into the garage today after a 5 mile ride. Thoughts for what you would go after first?
79 KZ650 SR
80 KZ1000 Z1 Classic
83 KZ1100 LTD
Z900RS
23 Mach 1
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- Nebr_Rex
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11 Nov 2015 01:34 #698176
by Nebr_Rex
Carbs are starting to plug up, time to clean.
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2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
www.dotheton.com/forum/index.php?topic=39120.0
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Replied by Nebr_Rex on topic High RPM Miss KZ440
ajsfirehawk wrote: Also could be a lean condition do to a new issue in the carbs/fuel system.
Last items, the bike does seem to take a long time to warm up, I'd say a full four minutes before it will run off choke. For the first time I also got a backfire when I throttled up to pull into the garage today after a 5 mile ride.
Carbs are starting to plug up, time to clean.
.
2002 ZRX1200R
81 GPz1100
79 KZ1000st daily ride
79 KZ1000mk2 prodject
78 KZ650sr
78 KZ650b
81 KZ750e
80 KZ750ltd
77 KZ400/440 cafe project
76 KZ400/440 Fuel Injected
www.dotheton.com/forum/index.php?topic=39120.0
.
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