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SOHC.co.uk Forums => CB500/550 => Topic started by: philgresty on April 13, 2017, 09:56:49 PM

Title: 650 cam in a 550
Post by: philgresty on April 13, 2017, 09:56:49 PM
Don't know if anyone here has done this yet but ill share my expereience. Last weekend i finally decided to fit the cb650 cam iv had lying round into my 550. Has gave it a nice little bump in power, not loads quicker but it seems to have more power in places it didn't before due to the higher lift and longer duration, so it feels well more usable.
The job was pretty straight forward, no different to refitting a 550 cam, times up exactly the same, all i did have to do was dremel a tiny bit of casting off the inside of the head for a lobe to clear.
Would recommend this swap to anyone, cost me 40 quid, alot less than an aftermarket cam.

(http://i669.photobucket.com/albums/vv52/philgresty26646/bionic%20b5r/17632293_10212407868008938_2104883279291245454_o.jpg) (http://s669.photobucket.com/user/philgresty26646/media/bionic%20b5r/17632293_10212407868008938_2104883279291245454_o.jpg.html)

(http://i669.photobucket.com/albums/vv52/philgresty26646/bionic%20b5r/17311381_10212253649193564_1583655210738150230_o.jpg) (http://s669.photobucket.com/user/philgresty26646/media/bionic%20b5r/17311381_10212253649193564_1583655210738150230_o.jpg.html)
Title: Re: 650 cam in a 550
Post by: florence on April 14, 2017, 07:58:21 AM
Very good.  I wonder if it would fit in the 500 as well?
Title: Re: 650 cam in a 550
Post by: philgresty on April 14, 2017, 08:41:23 AM
It would fit a 500 too.
The cams don't come up too often but it's definitely worth it
Title: Re: 650 cam in a 550
Post by: kevski on April 14, 2017, 09:36:05 AM
Is that a cut down Delkevic exhaust you have there, if so it is better looking than the full length version.
Title: Re: 650 cam in a 550
Post by: philgresty on April 14, 2017, 03:19:54 PM
It is yeah, main reason i cut it up was to clear the wider box section swingarm i have, in stock form it wouldnt have done.
Title: Re: 650 cam in a 550
Post by: Bryanj on April 14, 2017, 06:24:31 PM
Mechanical tacho gives wrong reading tho!
Title: Re: 650 cam in a 550
Post by: philgresty on April 15, 2017, 07:28:33 AM
Yeah, I'v used the 650 tacho drive too, so any 4:1 tacho (cb650,cb750) will work
Title: Re: 650 cam in a 550
Post by: florence on April 15, 2017, 11:10:45 AM
my rev counter cable broke about eight years ago and haven't got round to replacing.....