Author Topic: cb 750 valve spring shims  (Read 1107 times)

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750mikeb

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cb 750 valve spring shims
« on: November 14, 2008, 07:44:23 PM »
Does anyone make valve spring shims for s cb750 I thought I would perk the spring up a bit in my 750 f head thats being redone thanks mike

Offline City Boy

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Re: cb 750 valve spring shims
« Reply #1 on: November 14, 2008, 07:52:29 PM »
If you can,check some other Honda models.Some use hardened flat inner and outer spring seats that might fit the bill.  Rock On
'52 Kiekhaefer Mercury Rocket Hurricane KG4H
'70 750/Cobra 1000 Original Owner
'83 1100F

Offline speedracer741

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Re: cb 750 valve spring shims
« Reply #2 on: November 15, 2008, 12:29:03 AM »
I have them in stock. They are available is .015", .030" and .060" thickness and are hardened. They fit under the stock cupped shim. I used to have them always listed on ebay but they were never a big seller so now I just keep them handy in case I am asked about them. $12.00 for a set of 8 if you need them.
Chris

'74 CB750K
'76 CB750F
'75 CB550K
'71 CB500K
'77 KZ1000 x2
'78 KZ650 TURBO
'80 KZ750LTD
'78 GS550E/650 hybrid

Offline MRieck

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Re: cb 750 valve spring shims
« Reply #3 on: November 15, 2008, 06:47:16 AM »
Does anyone make valve spring shims for s cb750 I thought I would perk the spring up a bit in my 750 f head thats being redone thanks mike
Why don't you just get a new spring set from Kibblewhite or APE.....they aren't expensive.
Owner of the "Million Dollar CB"

Offline speedracer741

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Re: cb 750 valve spring shims
« Reply #4 on: November 15, 2008, 02:21:48 PM »
Does anyone make valve spring shims for s cb750 I thought I would perk the spring up a bit in my 750 f head thats being redone thanks mike
Why don't you just get a new spring set from Kibblewhite or APE.....they aren't expensive.

Agreed. If you want more than stock spring pressure you should upgrade the springs. Shims should only be used for correcting spring installed height, not increasing the pressure more than intended.
Chris

'74 CB750K
'76 CB750F
'75 CB550K
'71 CB500K
'77 KZ1000 x2
'78 KZ650 TURBO
'80 KZ750LTD
'78 GS550E/650 hybrid

Offline MRieck

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Re: cb 750 valve spring shims
« Reply #5 on: November 15, 2008, 02:39:07 PM »
Does anyone make valve spring shims for s cb750 I thought I would perk the spring up a bit in my 750 f head thats being redone thanks mike
Why don't you just get a new spring set from Kibblewhite or APE.....they aren't expensive.

Agreed. If you want more than stock spring pressure you should upgrade the springs. Shims should only be used for correcting spring installed height, not increasing the pressure more than intended.
Are you reading my mind? ;) ;D
Owner of the "Million Dollar CB"

Offline speedracer741

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Re: cb 750 valve spring shims
« Reply #6 on: November 15, 2008, 05:55:21 PM »
Yes, creepy isn't it? ;D
Chris

'74 CB750K
'76 CB750F
'75 CB550K
'71 CB500K
'77 KZ1000 x2
'78 KZ650 TURBO
'80 KZ750LTD
'78 GS550E/650 hybrid

Offline 74750k4

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Re: cb 750 valve spring shims
« Reply #7 on: August 13, 2012, 12:19:39 PM »
Kibblewhite supplies .060 shims (for the 77-78 F2 heads) with their springs sets for the K series heads. Is this going to be too stressful if I use those shims on a K1 head? I put them on, and they seem ok. It definitely seals the valve faces to the seats much better. Lower leakage values.

 

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