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Author Topic: CB550 / 650 Head  (Read 1365 times)

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Offline jt

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CB550 / 650 Head
« on: April 07, 2006, 09:35:57 PM »
Hi Guys.

   New to the site as member.  I was wondering if the CB 650 head would fit onto a CB550 motor. Thinking about doing the CB750F piston modification to get up to 591cc and the larger c/chamber would be a benefit I believe.

Thanks
jt
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Offline bryanj

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Re: CB550 / 650 Head
« Reply #1 on: April 08, 2006, 03:42:24 AM »
Physically yes but not sure what else you will have to change e.g. studs, rockers, top cover etc
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Offline crazypj

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Re: CB550 / 650 Head
« Reply #2 on: April 09, 2006, 02:09:24 PM »
Manifolds are slightly different (cast in rather than bolt on) bigger valves though so carb set would bre a good idea if you can get hold of it. Cam sprockets are different (hyvo on 650) but isnt a problem unless your fitting 650 crank to 550 cases (longer stroke 700ish I think?) Get a complete head as rocker box/covers are different on 550
I have most but not all the parts for mine when (if) I get round to it.
PJ
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Offline jt

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Re: CB550 / 650 Head
« Reply #3 on: April 10, 2006, 09:28:14 AM »
Thanks guys for the info. Just what I needed to hear.

JT
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