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Author Topic: 1977 CB750A Aluminum Rims Swap to CB750K8  (Read 1179 times)

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Offline teamtiger21

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1977 CB750A Aluminum Rims Swap to CB750K8
« on: March 02, 2018, 11:16:42 AM »
I have the opportunity to obtain some very nice 1977 CB750A aluminum rims for use on a CB750K8 Cafe project. Are there any direct swap issues? Are there any issues with the 17" vs 18" rear tire for handling? Thanks Barry
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Offline Bankerdanny

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Re: 1977 CB750A Aluminum Rims Swap to CB750K8
« Reply #1 on: March 02, 2018, 01:04:18 PM »
Your K8 should have come with a 17" rear originally if I recall correctly.

At any rate, there should be no fitment or handling issues.
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Current: '76 CB750F. Previous:  '75 CB550F, 2007 Yamaha Vino 125 Scooter, '75 Harley FXE Superglide, '77 GL1000, '77 CB550k, '68 Suzuki K10 80, '68 Yamaha YR2, '69 BMW R69S, '71 Honda SL175, '02 Royal Enfield Bullet 500, '89 Yamaha FJ1200

Offline Desert-SOHC

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Re: 1977 CB750A Aluminum Rims Swap to CB750K8
« Reply #2 on: March 02, 2018, 03:31:32 PM »
They bolt right up, I have a set on mine.
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Offline teamtiger21

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Re: 1977 CB750A Aluminum Rims Swap to CB750K8
« Reply #3 on: March 03, 2018, 07:58:58 AM »
Thanks, it's a plan!
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Offline beemerbum

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Re: 1977 CB750A Aluminum Rims Swap to CB750K8
« Reply #4 on: March 04, 2018, 02:25:25 PM »
750 A front on my K7. No issues whatsoever. Now I have matching wheels. I'm thinking of going to somewhat heavier fork oil to compensate for the much lighter new wheel. ATF in the forks now./
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Offline DV Red Herring

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Re: 1977 CB750A Aluminum Rims Swap to CB750K8
« Reply #5 on: March 04, 2018, 05:34:06 PM »
What would be the benefit, if any, to putting these wheels on my K4? I like the aluminum look. I'm not sure if there may be a performance difference though.
« Last Edit: March 06, 2018, 06:29:49 PM by DV 750 Red Herring »
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Offline seanbarney41

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Re: 1977 CB750A Aluminum Rims Swap to CB750K8
« Reply #6 on: March 04, 2018, 06:43:15 PM »
Quote from: DV 750 Red Herring on March 04, 2018, 05:34:06 PM
What would be the benefit, if any, to putting thsee wheels on my K4? I like the aluminum look. I'm not sure if there may be a performance difference though.
pretty nice weight savings gets you better acceleration, handling, and braking.  Plus those rims are just way better quality so your wheels should be rounder.  That is something you can really feel.  The chromed steel wheels found on most 70's jap bikes were really just built to a cost.
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Offline fireman1073

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Re: 1977 CB750A Aluminum Rims Swap to CB750K8
« Reply #7 on: March 05, 2018, 04:05:32 PM »
Here’s my 75 k with Hondamatic rims
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Offline Desert-SOHC

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Re: 1977 CB750A Aluminum Rims Swap to CB750K8
« Reply #8 on: March 05, 2018, 09:57:32 PM »
Quote from: beemerbum on March 04, 2018, 02:25:25 PM
750 A front on my K7. No issues whatsoever. Now I have matching wheels. I'm thinking of going to somewhat heavier fork oil to compensate for the much lighter new wheel. ATF in the forks now./

I did 10wt and was MUCH happier with the ride.
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Offline beemerbum

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Re: 1977 CB750A Aluminum Rims Swap to CB750K8
« Reply #9 on: March 06, 2018, 07:46:16 AM »
Thanks, sounds like a plan. 10 weight it will be. Another thing I learned with this new wheel: To make sure the tire is seated properly, I reduced the pressure and rode the bike for a mile. I then pumped it to the correct PSI and rode the bike again. Before I did this, I had an up and down vibration in the wheel. Someone suggested the above to let the tire seat itself better. It worked.
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