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View Full Version : 86 Yamaha BW200...... YTM200 engine performance



KingNothing
08-31-2009, 12:20 AM
Hey guys.... Ive been out of the loop for over a year or so. Good to be back here on 3 wheeler world. I still have my 85 Tri-Z, but I had been spending time on my '87 LT500R.... Now that its all restored and race ready... I have something a little different I am working on. I picked up an 86 Yamaha BW200.... I am gonna rebuild it. It ran, but didn't have much for compression. What can I throw in this thing to pep it up. I'm not expecting land speed records. I figure if I am gonna rebuild it, might as well squeeze all I can out of it.

What should I do? 10.25 to 1 piston?

Can i get a better CAM?

I'm not big on 4 strokes at all... i had an 85 350x that was pretty impressive, but I'm still not stuck on them.


plan B


1986 YZ250 engine on the shelf here. Has a Tri Z side case..... Would defiantly make it go.....

lndy650
08-31-2009, 12:52 AM
i like plan B !!!! the hell with 4 pokers

thefox
08-31-2009, 07:45 AM
Performance difference I don't know but I am puttting a BW motor in a YTM. It is not a bolt in but doesn't seem to take much to make it fit (I haven't finished putting the motor in yet).