Well I've been researching this for quite a long time and I finally got a chance to finally do this project. It started out as an '87 XR 600,the guy who had it lost interest in it ,so when I found out about the bike I had to get it.The motor was already out when I bought it,he had the tranny rebuilt and a new Barnett clutch and basket put in he said,the crank and rod are also brand spankin new also,the bummer... NO Head !! But I have everything else.
So far I stripped it down,and put on the frt end off an '86 350X and got the swinger on the rear ,it was'nt too bad of a mod so far.I am sending out the rolling chasis this weekend to get the rake brought back 3 inch's. I would tackle that but.. this being a 600 motor the downtube and the upper part of the neck are the oil resivoir,thus I figure I will let a pro welder tackle that,and I am planning a 4 inch extended swinger.I have modded a '85 200X swinger and with the help of a couple bushing's ,it look's like the sproket will line up pretty nice.
As far as incorperating the motor into a 350X frame,that ain't gonna happen and be safe. I am worried about the torque this motor is gonna have so I am gonna go with the existing frame and take part of the sub frame off a '86 350X frame,so when all is done the stock 350X tank and fenders should work.As you can see by the motors side by side ,350X on left /600XR on the right - the only thing these have in common is the Honda name if you ask me. I am planning for a drag only machine but maybe this could be a Wild Trail machine,I guess I'll see how all this goes 1st.. I'll keep posting pic's .