'84 KZ750LTD (Shafty) cams timing problem

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'84 KZ750LTD (Shafty) cams timing problem

23 Jan 2018 12:55 - 23 Jan 2018 13:00
#777652
hi all, im back into my forsaken project of a kz 750 into cafe racer conversion, now i assemble the engine. the bike was in buckets when bought, so ive never seen it running
well, long story short...
when i set cams by the marks

[IMG


and started to rotate the crank (the tensioners innit as well), i'd heard kinda clicks. so i had to remove the head and seen the scratches on the intake valves made by the outlet valves

[IMG


thats a mockup setup, all marks were in line, ken oath!

[IMG


[IMG


[IMG


then i looked better into the manual and saw the pic

[IMG


so i suspect that the outlet cam's sprocket installed through wrong holes.
is it so?
thanks in advance mates!
ZN750 Ltd Shaft (non-USA)
Last edit: 23 Jan 2018 13:00 by Surt.

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Re: '84 KZ750LTD (Shafty) cams timing problem

24 Jan 2018 09:31
#777706
alrighty, the probs sorted
ZN750 Ltd Shaft (non-USA)

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Re: '84 KZ750LTD (Shafty) cams timing problem

24 Jan 2018 23:37 - 24 Jan 2018 23:38
#777730
Guess you realized that you put the exhaust cam in the wrong holes on the sprocket or you have two inlet cams.

Opsi! Take all the valves out and make sure they are still strait and that the valve guides are ok.

/A
Read the manual twice, wrench once.

Inteesting thing that you and exchance the cams and still turn over the engine by hand. Dont ask how I know.
Gpz750R1 1982
Gpz750A1 1983
Gpz1100A2 1984
FZ750 1985
Gpz900R -91
Last edit: 24 Jan 2018 23:38 by scubaanders.
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Re: '84 KZ750LTD (Shafty) cams timing problem

25 Jan 2018 08:24 - 25 Jan 2018 08:27
#777742
Yah Scuba that's what I thought when I read this. At least maybe pour some fuel oil or kerosene in the ports to see if the valves are not bent and leaking..... hoping they are ok. Be sure to clean the bolts holding the sprockets, torgue em to the low end or mid range using a inch lb wrench and use blue loctite on them too. A few that are smarter than me by far say to use green loctite (med strength or red).
1978 KZ650 b-2
700cc Wiseco kit 10 to 1.
1980 KZ750 cam, ape springs, stock clutch/ Barnett springs.
Vance and Hines Header w/ comp baffle and Ape pods, Dyna S and green coils, copper wires.
29MM smooth bores W/ 17.5 pilots, 0-6s and 117.5 main
16/42 gearing X ring chain and alum rear JT sprocket.
Last edit: 25 Jan 2018 08:27 by KZB2 650.
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Re: '84 KZ750LTD (Shafty) cams timing problem

25 Jan 2018 11:27
#777752
Yup! Blue locktight or better not remove them unless you ar planning to slot the sprockets inorder to time the cam's.
I am not shure if I would trust the kerosene method, I would remove tve valves in order to make sure their steait. As a lost valve create major damage to the engine.
Gpz750R1 1982
Gpz750A1 1983
Gpz1100A2 1984
FZ750 1985
Gpz900R -91
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Re: '84 KZ750LTD (Shafty) cams timing problem

03 Feb 2018 01:24 - 03 Feb 2018 01:28
#778129
thanks for replies mates, yup i somehow mixed up shafts from 2 engines, coz i'd bought a gpz 750 engine as well. now the buggers sorted no wuccas no bends good comp
but i have 2 details left in the box, no idea where are they from, hopefully they got in by chance?

the 1st one is a jet like pipe, 6.3 mm o.d. x 15.6 mm long

[IMG


[IMG


and the 2nd one is a pretty big cyl, a stop or plug, 15.1 mm o.d. x 13 mm long

[IMG


any guess? and thanks heaps in advance!
ZN750 Ltd Shaft (non-USA)
Last edit: 03 Feb 2018 01:28 by Surt.

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Re: '84 KZ750LTD (Shafty) cams timing problem

03 Feb 2018 05:45
#778138
Goes in the starter clutch.
Steve
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Re: '84 KZ750LTD (Shafty) cams timing problem

03 Feb 2018 08:05
#778149
the 1st detail?
ZN750 Ltd Shaft (non-USA)

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Re: '84 KZ750LTD (Shafty) cams timing problem

03 Feb 2018 19:04
#778163
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD slowly moving toward resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/forum/11-projects/620336...amateur-build-thread
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Re: '84 KZ750LTD (Shafty) cams timing problem

04 Feb 2018 00:01
#778173

a hell of a news, and probably the 2nd one is 92122...
and there must be a spring 92081
multiplied by 3
i'll look into my other engine, hopefully the parts fell out from it
and thanks Tex!
ZN750 Ltd Shaft (non-USA)

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Re: '84 KZ750LTD (Shafty) cams timing problem

04 Feb 2018 09:46
#778194
sometimes just a lucky bastard! looked into the gpz750 engine and lo!

[IMG


sorted

[IMG


btw what is that, a thermostate like thingy? theres nothing like that in the kz sump

[IMG
ZN750 Ltd Shaft (non-USA)

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Re: '84 KZ750LTD (Shafty) cams timing problem

04 Feb 2018 11:57
#778205
Oil level switch
1982 KZ1000 LTD parts donor
1981 KZ1000 LTD slowly moving toward resurrection
2000 ZRX1100 not ridden enough

www.kzrider.com/forum/11-projects/620336...amateur-build-thread
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