sanding cam bearings???

  • Powerstroke_fan
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Re: sanding cam bearings???

20 Jan 2012 13:58
#499057
ok i think i will try sanding them lightly and check them with plasti gauge. Thanks for the help everyone and larry. I will try to get some j model pistons for the next rebuild when the head will hopefully be goin to larry also. (us poor folk have to build little by little lol). Thanks again everyone i couldnt have done this build without all your help!
1980 kz1000B4 LTD- 1327cc 9-1 comp
Ported J model head
Psp-3x cams
RS 36s
Welded MK11 crank
Back-cut MK11 trans
MTC 2 stage lock up
Stretched 4-6 over running Hayabusa rear rim with 190 rear tire
Complete frame brace kit installed
And Much Much more- SOLD

2014- ZX14R all stock for now

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  • zed1015
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Re: sanding cam bearings???

20 Jan 2012 14:24
#499063
andy9802gt wrote: Two of the last three responses are completely incorrect. :dry: Sanding cam bearings is not uncommon, post pics or pm larryc he can tell you without doubt if the are worth saving.

Sanding is fine if it is done correctly and as a way to get the correct shell/journal clearance in the case of tight fitting cams etc (as larry explained as he neatly dodged the scored shell cure :laugh: ). however it is not recommended as a cure for badly scored shells as chances are you will go beyond servicable limits.
Common practice for gaining clearance is to remove material from the back (non bearing surface) of the shell.
Only of use really in the case of installing new shells which are tight of course and not this case.
AIR CORRECTOR JETS FOR VM CARBS AND ETHANOL RESISTANT VITON CHOKE PLUNGER SEAL REPLACMENT FOR ALL CLASSIC AND MODERN MOTORCYCLE CARBURETTORS
www.kzrider.com/23-for-sale/611992-air-c...lide-mikunis?start=0





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  • LarryC
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Re: sanding cam bearings???

20 Jan 2012 15:39
#499071
Powerstroke_fan wrote: ok i think i will try sanding them lightly and check them with plasti gauge. Thanks for the help everyone and larry. I will try to get some j model pistons for the next rebuild when the head will hopefully be goin to larry also. (us poor folk have to build little by little lol). Thanks again everyone i couldnt have done this build without all your help!

You have to clearance the tappet bores anyway so the valves need to come out. That's the time to see how well the cams spin. They should spin free and easy.
Larry C.

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  • Old Man Rock
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Re: sanding cam bearings???

20 Jan 2012 21:26
#499116
Sanding-Smanding, do like Nads... Weld them Sonsabitches in.... :blink: :pinch: :whistle: :evil: :laugh:
1976 KZ900-A4
MTC 1075cc.
Camshafts: Kawi GPZ-1100 .375 lift
Head: P&P via Larry Cavanaugh
ZX636 suspension
MIKUNI, RS-34'S...
Kerker 4-1, 1.5" comp baffle.
Dyna-S E.I.
Earls 10 row Oil Cooler
Acewell 2802 Series Speedo/Tach
Innovate LC1 Wideband 02 AFR meter

Phoenix, Az

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  • jonnybravo
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Re: sanding cam bearings???

20 Jan 2012 22:27
#499127
sorry I was informed by a builder of drag race motors the "it would not be a good idea" to sand bearings, which I should have quoted, also he said, the "if it were mine" thing, if LC says it OK then OK, I apologize as I did not intend to misinform

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  • lemo32
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Re: sanding cam bearings???

20 Jan 2012 23:31
#499139
Sanding is one thing, crocus cloth is another, I would never use sand paper on any internal motor parts, crocus cloth is used on all types of internal parts even cranks and leaves no sandy residue behind that might embed onto a surface.
1979 kz 1000 06 katana 750

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  • lemo32
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Re: sanding cam bearings???

20 Jan 2012 23:35
#499140
Poor mans rule of thumb is if you can feel it with a finger nail its probably better to replace.
:unsure:
1979 kz 1000 06 katana 750

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  • andy9802gt
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Re: sanding cam bearings???

20 Jan 2012 23:42
#499142
lemo32 wrote: Poor mans rule of thumb is if you can feel it with a finger nail its probably better to replace.
:unsure:

Look who's got the deep pockets now. :whistle:
'78 KZ1075 LTD
stage 1 head by Larry Cavanaugh
race built crank by John Pearson
Mikuni rs34's
k410 cams
back cut tranny
8" over D&G swinger
proving once again that age and treachery is better than youth and enthusiasm

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  • LarryC
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Re: sanding cam bearings???

21 Jan 2012 00:06 - 21 Jan 2012 00:09
#499144
andy9802gt wrote:
lemo32 wrote: Poor mans rule of thumb is if you can feel it with a finger nail its probably better to replace.
:unsure:

Look who's got the deep pockets now. :whistle:

;) says it all

Larry C.
Last edit: 21 Jan 2012 00:09 by LarryC.

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  • andy9802gt
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Re: sanding cam bearings???

21 Jan 2012 00:21
#499147
That's to funny Larry. :)
'78 KZ1075 LTD
stage 1 head by Larry Cavanaugh
race built crank by John Pearson
Mikuni rs34's
k410 cams
back cut tranny
8" over D&G swinger
proving once again that age and treachery is better than youth and enthusiasm

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  • lemo32
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Re: sanding cam bearings???

21 Jan 2012 00:59
#499148
If you post in here, you can bout bet someones going to piss on your post, just way it works, no need to be scared, :P
1979 kz 1000 06 katana 750

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  • steell
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Re: sanding cam bearings???

21 Jan 2012 14:22 - 21 Jan 2012 14:23
#499224
Why does it have to be a pissing contest? I have my way and you have your way, big deal, don't seem like something to get upset about. It would be a boring world if everyone thought the same.

More than one way to skin a cat.
KD9JUR
Last edit: 21 Jan 2012 14:23 by steell.

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