changed headgasket and now wont start ...???

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28 Nov 2012 22:55 #560397 by andyvr4
Hi I have a 1983 kz750 Ltd h4 chain drive. And I just replaced the headgasket and put it all back together and now it doesn't start. I think its my timing I lined up the z7ex with the head on the exhaust cam and counted 45-46 teeth and put the in, between 44-43 cause it looks like the picture. But it says to put it at 45-46 teeth but I'm afraid ill mess up a valve. And i did this all at t1 notch next to f1f4.

1983 kz750 Ltd 4 cyl.

Andy

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28 Nov 2012 23:27 - 28 Nov 2012 23:48 #560399 by 4TheKZ1000
Replied by 4TheKZ1000 on topic changed headgasket and now wont start ...???
sorry but looks like you may have damaged her.

Timing must have been off. Just a few teeth off on chain or cam oriention wrong and a valve can come into contact with the piston.

I would guess no noise if you try to start...like backfire or any sign of bike turning over or tring to run?

I would try to correct timming first, this can keep further damage from happing if any at all.

Then if bike turns over a compression check would be in order. If that is ok the valves are fine.
Last edit: 28 Nov 2012 23:48 by 4TheKZ1000.

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29 Nov 2012 03:21 #560426 by bountyhunter
Replied by bountyhunter on topic changed headgasket and now wont start ...???
what's the compression read?

1979 KZ-750 Twin

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29 Nov 2012 10:00 #560441 by andyvr4
Replied by andyvr4 on topic changed headgasket and now wont start ...???
Haven't done a compression test yet will today. But was all at 120 before head gasket change. It did backfire after a couple of cranks. But did not start. I turned the engine over by wrench a few times before start and there was no tapping. All quiet. And even cranking no tapping. Also before all this I did the dynojet kit install and this is the first attempt to start it.

1983 kz750 Ltd 4 cyl.

Andy

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29 Nov 2012 11:16 - 29 Nov 2012 11:21 #560450 by Patton
On some models it's possible to install the timing advancer rotor 180° out.

When the pointer (stock igniter) or embedded magnet (Dyna-S) passes by the left-side pickup module, it ungrounds whichever ignition coil is connected to the left-side pickup module, which causes the ignition coil to fire.

When the pointer (stock igniter) or embedded magnet (Dyna-S) passes by the right-side pickup module, it ungrounds whichever ignition coil is connected to the right-side pickup module, which causes the ignition coil to fire.














Good Fortune! :)

1973 Z1
KZ900 LTD
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Last edit: 29 Nov 2012 11:21 by Patton.

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29 Nov 2012 11:25 #560452 by Patton
If needed -- wiring diagram from FILEBASE:

Click > www.kzrider.com/filebase/doc_download/317-z750h4

Good Fortune! :)

1973 Z1
KZ900 LTD

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29 Nov 2012 13:17 #560470 by andyvr4
Replied by andyvr4 on topic changed headgasket and now wont start ...???
Thank you ill check this out also

1983 kz750 Ltd 4 cyl.

Andy

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29 Nov 2012 23:31 #560572 by andyvr4
Replied by andyvr4 on topic changed headgasket and now wont start ...???
It was my timing got it right now, now I just need to get my jets situated thank you for the help

1983 kz750 Ltd 4 cyl.

Andy

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