Firing on one cylinder - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 6 (permalink) Old 05-28-2019, 12:37 PM Thread Starter
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Firing on one cylinder

After putting my rebuilt engine back in it had been rebuilt probably 6 months earlier it would not fire up on the front cylinder so I did a compression test and there was none luckily it was the front so I could get the cover off without taking the engine out and check the valve timing which was correct it then dawned on me that there was no movement on the valve follower the lash adjusters were solid so after rebleeding them and after hours of work she's running like a good un so the moral of the story is don't bleed them to early
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post #2 of 6 (permalink) Old 05-28-2019, 09:49 PM
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problem...and solved!

so do you have to bleed the HLA's just before you get oil pressure in the system? I wonder how long it takes them to bleed all the oil out, and whether just running the system to get oil pressure is enough to get 'em back working. from you post it seems that's not the case, is it?

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post #3 of 6 (permalink) Old 05-29-2019, 02:26 AM Thread Starter
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When it first started up I was thinking give it a minute or and it will fire up but no it would not the rear got hot very quickly and the front just back fired occasionally after rebleeding the front HLA it fired up on the button the problem was harder to find has I just fitted a vance+hines and the exhaust note was loud because it was about six months between rebuilding it and installing it I came to the conclusion it would have been better to bleed them just prior to installing it but has they say you live and learn
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post #4 of 6 (permalink) Old 05-29-2019, 08:16 AM
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Maybe the first bleed wasn't complete?

Thinking about bikes that sit parked for much longer periods, and they still fire up, provided the carbs aren't gooped up or the valves stuck open.

Good job finding the problem though! Many bikes have been scrapped for lesser problems.

I haven't seen good lifters bleed down on their own, but some will with lots of cranking without oil pressure.

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post #5 of 6 (permalink) Old 05-30-2019, 11:02 PM
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I have never had a VN750 engine apart farther than was necessary to replace the stator and balancer bushings. But it sure sounds like there is a big difference between it and it's automotive counterparts.

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post #6 of 6 (permalink) Old 05-31-2019, 03:56 AM Thread Starter
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all engine have there difference's but they all work on the same principle so it's just a matter of using logic and a decent manual
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