1981 KZ750 LTD four questions

  • bluejacobs
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Re: 1981 KZ750 LTD four questions

08 Jul 2024 14:46
#901894
The engine sounds good and need only a good carb sync.
Sounds like three cyl. pushing/pulling the one cooler cyl. in question.

 
Yep so carb sync was on the list of things to do already, and I've got gauges, possibly not the best quality but they weren't the cheapest option, if they seem unreliable they'll be going back. 

What do you mean by your second sentence?
1981 Kawasaki KZ750 LTD - crashed 4/24, rebuilt and rode the rest of the year; undergoing DD/TLC

1981 KZ440 A - was running until the end of 2022, sitting in a barn for now
1981 KZ440A - donor bike

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  • Scirocco
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Re: 1981 KZ750 LTD four questions

08 Jul 2024 17:00
#901902
The throttle butterfly gap of the cooler cyl. is a little bit more closed, so this cyl. do generate less power output and do more drag.

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Re: 1981 KZ750 LTD four questions

Today 15:35 - Today 15:45
#911975
Alright so what feels like forever later, I am electing to delay the gratification of just riding the damn bike, and doing some due diligence. Today I pulled the valve cover and checked all 8 valves, twice with the FSM method and twice with the method Nessism has posted here, and on several other posts. My results were... uninspiring.

FSM Method Results
1I 0.15; 0.15 1E: 0.10; 0.12
2I 0.13; 0.13 2E: 0.08; 0.09
3I 0.13; 0.13 3E 0.13; 0.14
4I 0.13; 0.13 4E 0.13; 0.13

"The Other Way"
1I 0.08; 0.10 1E 0.06; 0.08
2I 0.08; 0.08 2E 0.06; 0.08
3I 0.13; 0.13 3E 0.10; 0.13
4I 0.13; 0.13 4E 0.08; 0.12

So 3 and 4 were relatively consistent across both methods, and 1 and 2 were all over the damn place. Do I just suck at measuring? Brand new set of feeler gauges, since apparently I lost mine in the most recent move... Also @Nessism in your prefered method, the last step has you index the #4 exhaust to measure the 3/4 intakes... I'm assuming that is a typo?

Anyone have any ideas? I was feeling good for about a quarter of a second and was ready to order some shims for 2E, but now I'm having second (and third) guesses. Did I need to do anything with the cam chain tensioner before taking off the cover? Could that be throwing things off? I assumed you'd want everything taught to turn the engine over for the clearance checks... 

Unrelated (except it also happened to be today) I learned some dillhole must have stripped the oil drain plug and tapped it out to 7/16"... 
1981 Kawasaki KZ750 LTD - crashed 4/24, rebuilt and rode the rest of the year; undergoing DD/TLC

1981 KZ440 A - was running until the end of 2022, sitting in a barn for now
1981 KZ440A - donor bike
Last edit: Today 15:45 by bluejacobs. Reason: Am stupid.

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Re: 1981 KZ750 LTD four questions

Today 16:19
#911978
. Also @Nessism in your prefered method, the last step has you index the #4 exhaust to measure the 3/4 intakes... I'm assuming that is a typo?


 

Yes, a typo.  So sorry.  I asked a mod to fix.  I don't want anyone to follow this incorrect instruction.

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