The mystery why my bike won't start... - Kawasaki Vulcan 750 Forum : Kawasaki VN750 Forums
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post #1 of 62 (permalink) Old 08-14-2013, 12:50 PM Thread Starter
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The mystery why my bike won't start...

Well is it possible that you could miss a part and tighten down a gear too tight and bind it from not turning over? My electrical is all good. My cylinders and pistons moved up and down when I was putting the bike back together. So I know the internal stuff is ok. When I tightened down a gear, maybe I did not get a washer in? It is binding?? Is that possible? When my husband tried jump starting it down the driveway the rear wheel locked up and wouldn't move at all. It of course is fine in neutral. I am going over everything inside the right side of the cover right now. I will be taking off the clutch assembly soon, just to double check everything...The clutch spun one way and not the other, I took it off making sure nothing was missing there, the brass washer and everything was there. So the starter gears are good. The water thing-impeller doesn't spin but figured that was ok. not sure it did when the bike wasn't moving. Hope I put enough info here to get some help if not please ask, did a case split, and not able to get it to turn over.
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post #2 of 62 (permalink) Old 08-14-2013, 02:28 PM
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Well, sorry to hear your engine is binding after a crankcase split. On the left side the crankshaft turns the balancer shaft and the timing chain for the front cylinder. On the right side the crank turns the gearbox input shaft via the clutch and the timing chain for the rear cylinder. The right hand end of the balance shaft is turned by the starter motor and its associated one way clutch and drive gears. The oil pump and water pump are driven from inside the cases from the balance shaft. I would suggest looking at the starter motor drive chain of gears, but to be honest you will just have to strip things to find exactly what is stopping things from turning.

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post #3 of 62 (permalink) Old 08-14-2013, 02:31 PM
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take the right side cover off and remove the starter reduction gear then see if the starter will turn over if it does then you know there is a bind somewhere in the motor if it doesnt then you know its the starter

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post #4 of 62 (permalink) Old 08-14-2013, 02:53 PM
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Just had a few more thoughts. You must have been able to turn the motor whilst installing the cam chains, so that side of things should be OK. If you did the front cylinder first did you install the rotor and balance drive (the one with the rubber dampers and the left hand thread), before turning the engine and doing the cam chains to the rear cylinder? If so then the problem can't be on the left side. Sounds like a problem on the clutch side. There are some big washer that have to have the chamfered side the right way - maybe worth looking there.

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post #5 of 62 (permalink) Old 08-14-2013, 06:51 PM Thread Starter
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Yes the motor turned while installing the cam chains I don't recall the order but I went along with the video of Roach there were a few things I did out of order from him but all the big stuff I went from one video to the next so not sure what order that was in. I have the right cover off for now and will see what I can see. Thanks for all the input. You guys are wonderful!

BeeSea
1986 750 Vulcan
Coastered
Relocate R/R to side cover
Re-did the engine
from the case up.(And it runs)
YOU CAN TOO!
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post #6 of 62 (permalink) Old 08-14-2013, 08:02 PM Thread Starter
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https://www.vn750.com/forum/picture.p...pictureid=5642
here is a picture of what I have checked out. The clutch spins, the starter spins one way, but this gear (that I am pointing to) doesn't turn....I am thinking it should.

BeeSea
1986 750 Vulcan
Coastered
Relocate R/R to side cover
Re-did the engine
from the case up.(And it runs)
YOU CAN TOO!
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post #7 of 62 (permalink) Old 08-14-2013, 08:03 PM Thread Starter
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did it show up now? Sorry the first post it didn't show up but here ya go

BeeSea
1986 750 Vulcan
Coastered
Relocate R/R to side cover
Re-did the engine
from the case up.(And it runs)
YOU CAN TOO!
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post #8 of 62 (permalink) Old 08-15-2013, 05:34 AM
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That is the right hand end of the crankshaft. It won't turn by hand as it has all the forces of compression and valve train acting on it. If you take the stator cover off ( other side, the one with three screws) you should be able to turn the crank with a socket on the rotor nut. Turn in an anticlock direction viewed from the rotor side, this is the way the motor turns. Although this is the way the nut undoes, it should stay tight as the force needed to turn the engine should be way below the torque that the nut should have been tightened to.

One can never have too many alternative forms of transport.

Last edited by gibbo; 08-15-2013 at 05:37 AM.
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post #9 of 62 (permalink) Old 08-15-2013, 07:54 PM Thread Starter
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OK took off the other side in front of the stator, and my husband could move it only a little and then couldn't repeat it....The bolt wasn't loosened, but we could not get it to move after the initial small amount. and it was very difficult he said. SO now what? What do you think is jammed up?
Thanks again for pointing me in the right direction...I so want to get this running!
Oh I do recall all this was moving when I installed and tightened the bolt, I recall putting a penny in there and a rag to try and keep it from spinning, I was reading in another thread about soaking the spark plugs with oil-or rather where the spark plugs go, so there would be enough grease to lube thing up-what do you think would this help?

BeeSea
1986 750 Vulcan
Coastered
Relocate R/R to side cover
Re-did the engine
from the case up.(And it runs)
YOU CAN TOO!

Last edited by BeeSea; 08-15-2013 at 09:11 PM. Reason: Adding info..
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post #10 of 62 (permalink) Old 08-15-2013, 09:50 PM
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Try and look into the cylinder. you may have to look into the intake or exhaust. Check that the valves are not hitting on top of the pistons.

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