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Author Topic: Countershaft/drive sprocket seal question-which one?  (Read 823 times)

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Offline Jerry E.

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Countershaft/drive sprocket seal question-which one?
« on: December 11, 2012, 07:38:13 PM »
I have an engine seal kit that says it fits 1969-76 K1-K6 &F1 ('76) model motors.  My motor is a 1975 FO motor. From what I've found, both use a 25x62x7mm seal, at the drive sprocket countershaft.  Anyone know if this would be a problem to use, or are there differences I'm not aware of?
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Offline HondaMan

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Re: Countershaft/drive sprocket seal question-which one?
« Reply #1 on: December 11, 2012, 09:47:08 PM »
Quote from: Jerry E. on December 11, 2012, 07:38:13 PM
I have an engine seal kit that says it fits 1969-76 K1-K6 &F1 ('76) model motors.  My motor is a 1975 FO motor. From what I've found, both use a 25x62x7mm seal, at the drive sprocket countershaft.  Anyone know if this would be a problem to use, or are there differences I'm not aware of?

Check with RXmanGriff: he just rebuilt his '75 F0. That was a transition year, so some of them had the K6 seal, and some had the F1 seal. The two are different sizes, with the shaft being bigger on the later one.
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Offline Jerry Rxman Griffin aka MuthaF'er

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Re: Countershaft/drive sprocket seal question-which one?
« Reply #2 on: December 11, 2012, 11:39:43 PM »
Many places do not consider that there is/was a 1975 CB750K0 Super Sport aka the original 75 F. They skip it and start with the 76 F1 which IS the same. This seal did NOT change until the 77 K and F when they switched over to the 630 chain.

 91205-300-005  OIL SEAL (25X62X7) 

CB750F A MOTORCYCLE, JPN, VIN# CB750F-1000002 TO CB750F-1015054
CB750F A (76) MOTORCYCLE, JPN, VIN# CB750F-2000003 TO CB750F-2022317
CB750K A (76) MOTORCYCLE, JPN, VIN# CB750-2540001 TO CB750-2575894
CB750K0 A MOTORCYCLE, JPN, VIN# CB750-1000001
CB750K1 A MOTORCYCLE, JPN, VIN# CB750-1044650
CB750K2 A MOTORCYCLE, JPN, VIN# CB750-2000001
CB750K3 A MOTORCYCLE, JPN, VIN# CB750-2200001
CB750K4 A MOTORCYCLE, JPN, VIN# CB750-2300001
CB750K5 A MOTORCYCLE, JPN, VIN# CB750-2500001
« Last Edit: December 11, 2012, 11:43:27 PM by Jerry Rxman Griffin »
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Offline Jerry E.

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Re: Countershaft/drive sprocket seal question-which one?
« Reply #3 on: December 12, 2012, 08:10:19 PM »
Thanks, that's what I needed. That is the seal part number I have.
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