Author Topic: CB 750 K5 won't start  (Read 625 times)

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Offline Harper

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CB 750 K5 won't start
« on: April 02, 2010, 12:00:40 PM »
Hi everybody,

I just put rebuilt, bench-tuned carbs back on, hooked up the fuel tank, replaced spark plugs (I have spark) and charged the battery, but the engine won't start. I get an occasional growl when I use the kick start, but it won't catch. I know there's fuel in the carbs (checked the outlet screws). A friend gave me some ether to try to help start. Any other suggestions about potential problems, a start-up procedure that I might be missing, or something that needs further testing?

Thanks,


Harper
1975 CB750

Offline nancy

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Re: CB 750 K5 won't start
« Reply #1 on: April 02, 2010, 02:30:23 PM »
choke valves locked - make sure they are moving up an down? Remove bowls, take out both jets from each carb and check for blockage? Use compressed air - or maybe fishing nylon - NOT wire. Set airscrew to base of say 1 turn out on each carb? Throttle cable(s) not working - or even connected? Left out one or all jets?
These are all things I did - that stopped mine from running after I did my first fiddle with my carbs.
Good luck.
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Offline JS550

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Re: CB 750 K5 won't start
« Reply #2 on: April 02, 2010, 02:36:48 PM »
Did you mess with any wiring? Maybe kill switch went bad or blown fuse.
If you're worried about how many calories are in beer, is losing weight really your biggest problem?