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Author Topic: Cam Suggestions  (Read 2291 times)

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Offline Dave Wyatt

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Cam Suggestions
« on: July 23, 2011, 12:07:40 PM »
Since I need to replace the camshaft, I was wondering which cam to go with.  Another one from an A, or go with something from another CB750.  Looking at used cams on flea-bay, and not spending a lot of money.
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Dave Wyatt
1976 CB750A
1965 C100
2008 GL1800
I swear, the damn things are starting to breed!

Offline jweeks

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Re: Cam Suggestions
« Reply #1 on: July 23, 2011, 01:16:02 PM »
K cam advanced a little. Cheap improvement in overall power.

                                                    J.Weeks
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Offline Dave Wyatt

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Re: Cam Suggestions
« Reply #2 on: July 24, 2011, 12:11:40 PM »
Are the K and F cams the same?
« Last Edit: July 24, 2011, 12:13:49 PM by Dave Wyatt »
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Dave Wyatt
1976 CB750A
1965 C100
2008 GL1800
I swear, the damn things are starting to breed!

Offline jweeks

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Re: Cam Suggestions
« Reply #3 on: July 25, 2011, 03:54:48 AM »
I don't believe so. K cams are far more readily available. Bike will run with F cam, but I'd be wanting a little more carburation.

                                                        J.Weeks
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Offline raymond10078

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Re: Cam Suggestions
« Reply #4 on: July 25, 2011, 05:23:02 AM »
It depends on the year.  For example, the 1976F and the 1978K cams are the same - but the same year cams (1976 F and K; and the 1978 F and K) were different.

Did a little more research:

14101-392-000 - 75 and 76F, 77 and 78K
14101-410-000 - 77 and 78F

The K0 through K6 bikes used different cams.

It is my plan to use the 392 cam, or a little "hotter" aftermarket cam - in combination with a different stock head (the 75 and 76F, the 77 and 78K have the same heads) in my "A".
« Last Edit: July 25, 2011, 05:31:41 AM by kandrtech »
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1978 CB750A (upgrading very, very slowly)

Past bikes - Honda: SL350, CX650C, CB900C, CB1000C, CM450A; Kawasaki: several 1972 750 H2's; Suzuki: TC90J.

Bikes I want: CX650ED, a mid-sized japanese V-twin with ABS.

Offline octagon

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Re: Cam Suggestions
« Reply #5 on: July 27, 2011, 09:25:53 AM »
just curious - why are you replacing your cam? i've got a 77 hondamatic with about 35000 miles on it and the cam is worn - are hondamatics in general hard on cams?
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Offline raymond10078

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Re: Cam Suggestions
« Reply #6 on: July 27, 2011, 10:15:03 AM »
Hondamatics are "easy" on their cams - due to the lesser lift/duration.  Cam wear on CB750's is not altogether unusual.  I'm guessing it (primarily) is dependent on oil change practices and oil quality.

Speaking only for myself, I just want more power.  It is embarrasing (to me) to be out run by my sons 450 auto . . . .
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1978 CB750A (upgrading very, very slowly)

Past bikes - Honda: SL350, CX650C, CB900C, CB1000C, CM450A; Kawasaki: several 1972 750 H2's; Suzuki: TC90J.

Bikes I want: CX650ED, a mid-sized japanese V-twin with ABS.

Offline Dave Wyatt

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Re: Cam Suggestions
« Reply #7 on: July 27, 2011, 11:02:53 AM »
Quote from: octagon on July 27, 2011, 09:25:53 AM
just curious - why are you replacing your cam? i've got a 77 hondamatic with about 35000 miles on it and the cam is worn - are hondamatics in general hard on cams?

My oiling issue ate up 3 of four cam journals, so a replacement is needed.  I bought a pair of bases on e-bay that came with a cam, but that cam has pitting on the lobes.  No big deal, since I got everything else, including the rocker arms, and the price was right.  So now I need to find a cam, order some gaskets, and get to work.
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Dave Wyatt
1976 CB750A
1965 C100
2008 GL1800
I swear, the damn things are starting to breed!

Offline Sam Green Racing

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Re: Cam Suggestions
« Reply #8 on: July 28, 2011, 02:57:57 AM »
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