Design school: The TM 250/300MX engine is reminiscent of an old-school Suzuki
engine in terms of layout. The difference between the 250 and 300 is bore size.
A: The TM 300MX and 250MX share the same suspension components and setup. And, we didn’t like them. The forks were incredibly harsh. This seems to be de rigueur when European motor- cycle companies adopt Yamaha’s Kayaba forks. Husky has the same harsh forks on their TC250. We know that the forks are capable of turning in good performances, but the Italian settings are way off. Here’s what we ran in our 250MX and 300MX (the stock settings are in parentheses): Spring rate: 0.43 kg/mm Compression: 19 clicks out ( 14 clicks out) Rebound: 12 clicks out Oil height: 330cc (350cc) Fork-leg height: 6mm up Notes: According to TM, the suspension settings come directly from the numbers used by their factory riders. That would be like Suzuki putting James Stewart’s settings in every production RM-Z450. As they are set up, TM’s Kayaba forks are too stiff, too harsh and ride way too high in their stroke. We lowered the oil height by 20cc to get them closer to the Yamaha specs. Q: WHAT ARE THE BEST TM SHOCK SETTINGS?
Grunt: Once we geared the
300MX down, it was possible to
use third gear in many of the
corners and get into the meat
of the powerband quicker.