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Valve shims question
- dman3998
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My question is one of the shims had "270A" on it I have never seen any with letters. any ideas what it means?
Thanks
Dman
Dman
SE Idaho
"Smart only goes just so far, STUPID is UN-limited"
79 KZ1000 LTD
Honda XRL650L
Yamaha RD350B
Yamaha DT400B
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- bountyhunter
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Are you saying the shims showed .04 mm wear as to thickness compared to the marked thickness? That would be very unusual. Did you measure it with a calibrated set of calipers?I was checking the valve clearance, (1000 B3) they were all almost the same 265 - 275 all had the same wear about .04mm so I need to get a bunch of 260's and 265's.
dman3998 wrote:
I have seen it and I just ignored it. I don't know what it means either. I just measure the thickness and mark them myself since some of mine have the factory marks rubbed off.My question is one of the shims had "270A" on it I have never seen any with letters. any ideas what it means?
1979 KZ-750 Twin
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- keith1
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- timebomb33
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1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
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- keith1
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thats pretty cool info i've never seen those id markings described or explained before see i knew if i came on here i would learn something new today.
c'mon man...you have probably forgotten more than most know!!!!!!:laugh:
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- timebomb33
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1973 z1 2-1974z1-a,2-1975z1-b dragbikes1015cc+1393cc, 1977kz1000,1978kz1000,1981kz1000j, 1997 zx-11, 2000 z12r,1428turbo nitrous pro-mod and a shit load of parts thats all for now leader sask.,CANADA
I THINK MY POWERBAND BROKE
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- dman3998
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Dman
SE Idaho
"Smart only goes just so far, STUPID is UN-limited"
79 KZ1000 LTD
Honda XRL650L
Yamaha RD350B
Yamaha DT400B
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- luc
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It is not, as they said, to denote a slightly thicker shim installed at the factory but rather is is to identify shims that had a stricter QC standards.
Back in June 21 1973, Kawasaki issued a Service Bulletin (73 Z-13) titled "Z1 tapped replacement" to addres the issue of shims faillure due to a combination of shim and tappet design..
The tappet had an oil hole/navel in the center and the shims were flexing on top of it and fracturing.
To solve the problem tappets were replaced with tappets without oil hole/navel and new shims were put in production with a much stricter QC and all bikes in service were supposed to have both tappets and shims replaced regardless of their warranty status.
Kawasaki called that a "factory directed modification" and allowed 1.5 hour for the job
Those shims were identified with the letter "A" but did not have a new or differernt part #.
After a few years,assuming that all the earlier, non "A" shims woud have been removed from service and inventory, Kawasaki dropped the "A".
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- dman3998
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After re-shimming my motor I have a bunch of extra 270 and 260 shims that I probably will never use. and I still need a 275.
There are enough guys in every country that we would never have to actually buy a new shim. and for less than a buck you could post a couple of shims anywhere in the country.
I'm not sure how it would work but its a concept anyway.
dman
Dman
SE Idaho
"Smart only goes just so far, STUPID is UN-limited"
79 KZ1000 LTD
Honda XRL650L
Yamaha RD350B
Yamaha DT400B
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- keith1
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I wonder if we could figure out a way to trade shims?
After re-shimming my motor I have a bunch of extra 270 and 260 shims that I probably will never use. and I still need a 275.
There are enough guys in every country that we would never have to actually buy a new shim. and for less than a buck you could post a couple of shims anywhere in the country.
I'm not sure how it would work but its a concept anyway.
dman
thats a good idea...kind of like a shim exchange program....maybe site owner would be willing to set something up....might not be on the top ten list with vendors, but i think the membership might like it.....
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- bountyhunter
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1979 KZ-750 Twin
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- keith1
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Problem is, sending a small package these days is like $8 which is about what a couple of shims cost.
true
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