The TM MX125 engine feels and sounds like a race bike. Fast riders benefitted the most from the top-end powerband.
10cc of oil out of each fork leg. This softened up the stroke
and made the ride through braking bumps more supple.
These forks still aren’t up to YZ125 standards, but we can
at least tell they are related.
Q: HOW DOES THE TM MX125 HANDLE?
A: Each year the TMs seem to get better and better.
The bike no longer feels super tall in the rear. The bars
are no longer high-rise cow horns. Overall, the TM MX125
offers a good balance right off the bat. It turns decently
and tracks straight as an arrow. It’s no longer the black
sheep in the pack.
Q: WHAT DID WE HATE?
A: The hate list:
(1) Price. At $8295, this is a very expensive two-stroke.
( 2) Gearing. The stock 12/50 gearing is too tall. We
went with a 12/51 combination.
( 3) Rear sprocket bolts. There are nine bolts on the
rear sprocket; we only use six. (If you need three spare
sprocket bolts, call us.)
( 4) Race gas. For the TM MX125 to sing, not ping, it
needs a dose of C12 mixed with 91-octane pump gas.
Q: WHAT DID WE LIKE?
A: The like list:
(1) Outsourcing. We like TM’s top-quality, outsourced
components: Moto Tassinari reeds, Brembo calipers, HGS
pipe and Kayaba forks.
( 2) Powerband. The TM MX125 is fast. It competes
with the KTM 125SX and blows the YZ125 out of the
( 3) Hydraulic clutch. You can’t go wrong with a
self-adjusting hydraulic clutch.
( 4) Brakes. The 270mm Galfer front rotor and Brembo
hydraulics offer superior braking.
( 5) Forks. The Kayaba forks were still on the stiff side,
but taking out some oil really made these forks manageable. Plus, any suspension tuner in any town in America
has experience with these forks.
Q: WHAT DO WE REALLY THINK?
A: The 2018 TM MX125 looks, sounds and runs like
a serious race bike. It is competitive with any 125cc two-stroke on the market. Everything about this bike is good,
including the ergos and suspension. Its biggest downfall
is its cost. If you are willing to pay more for a bike that
is different from the rest, the TM MX125 is right up your