honda cb 550

[mike penson]

 :)hi can any one help me I have built a cb 550 café racer and have a Yoshi iom cam and want to fit it in my engine the cam fits the head ok but the valve springs are going coil bound so it wont turn over can any one help please or know where to send the head

[Bryanj]

Trying to go back in my memory but I seem to remember that that cam needed a lot of head work plus an incredible amount of ignition advance plus a huge sprocket on the rear to gear it down in order to use the revs. My first choice would be MReik in the US (he is on the US site) I got him to flow a 500 head by buying one on ebay US and having it sent to him, the work is first rate but you would have to send him the cam. You could always PM him on the US site and ask advise, I am sure if anyone knows the proper solution he would

[Woodside]

You could try Phil joy engineering....I think he's still around.....at least he was a couple of years back