Valve Shims

grumpy56
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Valve Shims

19 May 2013 23:34

Does anyone know if the valve shims on a J motor are hardened or treated in a manner that would cause an issue if I precision ground the thickness just a bit? Thanks.

Lewis
1982 KZ1000-J2
2006 HD FXD35
1970 Suzuki T350
1972 Suzuki GT380 (In-Process)
In The Past...71 TM400, 72 H-D SS350, 72 GT380, 75 Z1B, 77 XLH, 79 CB750K

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The_Proletariat
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Re: Valve Shims

19 May 2013 23:38

#588267

They are hardened. Do not grind them.

1982 Kawasaki KZ550 LTD

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grumpy56
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Re: Valve Shims

20 May 2013 09:31

#588314

Thank you Proletariat.

Lewis
1982 KZ1000-J2
2006 HD FXD35
1970 Suzuki T350
1972 Suzuki GT380 (In-Process)
In The Past...71 TM400, 72 H-D SS350, 72 GT380, 75 Z1B, 77 XLH, 79 CB750K

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Jeff.Saunders
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Re: Valve Shims

20 May 2013 10:10

#588320

This is what happens when you remove the hard surface of a shim and put it in the wrong way up...

I pulled this one out of a bike I bought. The shim said 2.65mm on the back, read 2.50mm on the edge, but read under 2.00mm in the center. The cam lobe was toast - down over 1/10th of an inch...

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grumpy56
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Re: Valve Shims

20 May 2013 13:50

#588351

Thanks Jeff. Perfect reason to not do what I was thinking of doing!

Lewis
1982 KZ1000-J2
2006 HD FXD35
1970 Suzuki T350
1972 Suzuki GT380 (In-Process)
In The Past...71 TM400, 72 H-D SS350, 72 GT380, 75 Z1B, 77 XLH, 79 CB750K

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mtkawboy
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Re: Valve Shims

20 May 2013 19:28

#588411

Last parts bike I bought the PO tried just removing the shims. That didnt work out too well, ruined the cam, bent the valves etc. Fortunetly I parts on hand to fix it

78-KZ1000/1105, 80 KZ1000, 82 Kawasaki GPZ750, 95 Harley Fatboy, 80 Suzuki GS1100ET, 81 GS1100E parts bike, 83 GS1100SD Katana/1394,78 Yamaha XT500, 81 Yamaha XS650, 78 Yamaha XS650E, 48 Whizzer model J motorbike, 71 Honda CT70H, 71 Honda CT70, 81 IT 250 Yamaha,82 Honda XL100S owned

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