After a little more than 96,000 km, my 1986 Yamaha FJ1200S was getting a little ragged. It turns out the cylinder bores were slightly oval from uneven heat distribution. That's a fairly common problem with air-cooled motors.

I found the mechanic who preps the motors for all the local Legends racers. He's also a motorcycle racing mechanic - the perfect guy to rebuild my FJ!

So... .030" overbore, Stage III Dyna-Jet carb kits, Dyna ignition, new valves & springs, some port work, balancing, tranny shims & undercutting... he figures something like 150 hp in a reliable street machine. :D :D :D