MXA’S KTM 150SX
Most MXA test riders prefer to race the KTM 125SX over the 150SX because of how seamless the 125 works through the
powerband. Where the 150 has an advanatge is when it comes to clearing jumps. Thus, it is 125 for speed and 150 for height.
The KTM 150SX engine has the prototypical high-rpm powerband. The big piston
adds bark, but knocks off some of the free rev compared to a 125SX.
with pump gas. VHM even offers
blank combustion chambers that you
can mill to your own specs (or send
them your specs and they will mill it
( 2) Pipe. The 150SX powerband
has more punch than the 125SX, but
isn’t as fluid from gear to gear. The
FMF pipe increased overall power
and made the bike easier to carry
speed on. Before adding the FMF
pipe, it had a chunk of power; with
the FMF pipe, it flowed better.
( 3) Suspension. Amazingly, we
left the WP components stock and
worked with the available combinations. We set the rear shock sag at
102mm and turned the compression
20 clicks out and rebound 13 clicks
out. On the forks, we took fork oil
out in 5mm increments, depending
on the weight of the test rider, and
set the clickers at 17 out on
compression and 15 out on rebound.
( 4) Seat cover. The seat cover
came from Moto Seat. It had a lot