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Author Topic: hondamatic exhaust  (Read 3473 times)

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Offline octagon

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hondamatic exhaust
« on: June 27, 2011, 07:11:36 PM »
hi, i have a 76 750k and usually don't visit this part of the forum.
i bought a 78 750a recently to part out. it has stock exhaust, which i really like. did some searches, and it sounds like others have had problems installing this system on k models. i was wondering if anybody here has actually done that.
also, what are these exhausts worth in good condition? there are only a couple of stock setups on ebay at the moment and the prices on them don't seem realistic.
these are model hm 393. also, sankei 2026 is stamped on each side, and a notice about them being for pre 1983 bikes only.
i figure if the a pipes are worth anything i should sell them and get something k specific. but if it is possible to swap over and have a decent fit without leaks i'd be interested in putting the time in to make that happen.     
thanks for any info on this
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Offline jukku

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Re: hondamatic exhaust
« Reply #1 on: June 27, 2011, 10:44:58 PM »
Hello.
The diameter of the headers are smaller on the CB750A!
The oilpan on the CB750A is lower than the other CB750 SOHC!
Sell your pipes and buy other pipes to your bike.
I have bought new CB750A pipes on Ebay to 800$/set
and used very good used pipes to 200$/set.
The Hondamatic pipes are very rare, especially good ones :'(
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Offline octagon

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Re: hondamatic exhaust
« Reply #2 on: June 28, 2011, 06:52:47 AM »
thanks for that information jukko. it's a pity the a pipes won't work, because they have a great style.
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Offline tomsweb1

  • '78 CB750A
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Re: hondamatic exhaust
« Reply #3 on: July 13, 2011, 02:34:13 PM »
If you're going to sell them... I need a set!
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Present: 1978 CB750A, 1978 CB400A, 1983 Nighthawk 550, 1984 CM250C

Past: 1977 XL100, 1982 KZ1300

Offline octagon

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Re: hondamatic exhaust
« Reply #4 on: July 14, 2011, 07:34:23 AM »
sorry i did sell them - if they would work on a k, it would be a lot of hassle and i knew a guy in this area that needed them.
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Offline Bill/BentON Racing

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Re: hondamatic exhaust
« Reply #5 on: July 21, 2011, 09:04:50 PM »
Quote from: tomsweb1 on July 13, 2011, 02:34:13 PM
If you're going to sell them... I need a set!
I have a set,have to check condition.Bill
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Offline tomsweb1

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Re: hondamatic exhaust
« Reply #6 on: July 22, 2011, 04:38:26 PM »
Sounds great! Let me know!
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Present: 1978 CB750A, 1978 CB400A, 1983 Nighthawk 550, 1984 CM250C

Past: 1977 XL100, 1982 KZ1300

Offline RickP1

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Re: hondamatic exhaust
« Reply #7 on: July 26, 2011, 05:06:11 PM »
I would be interested in the wheels from the bike if you still have them.

Thanks,

Rick
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Offline octagon

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Re: hondamatic exhaust
« Reply #8 on: July 27, 2011, 09:23:30 AM »
hi,
the bike i was talking about earlier had comstar wheels, but i've sold them. i did just find another hondamatic, a 77 with spoke wheels. i'm parting out that bike too - it's complete except on this one the exhaust is missing.
just pm if you're interested. shipping's a factor with anything bulky - my zip is 30619 which is near athens ga
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