CUSTOM OFF-ROAD MACHINE DB
The heart of the 250AFX is a 2001 Honda 250cc two-stroke engine, the last year before the electronic power-valve. And because Service Honda is part of Service
Powersports, which is a huge dealership, you can custom
order your 250AFX with any aftermarket goodies you like.
They can port the motor or get you a different exhaust,
handlebars, levers—you name it, they can build a 250AFX
to your specs. We didn’t choose to go that route, though.
Our 250AFX was a completely stock CRF250X with a
bone-stock two-stroke powerplant. To get the 250cc motor
into the X frame, the cradle—from the footpeg to the
downtube—is replaced by Service Honda, and the top-quality welding is heat-treated after the modification to
A stock Honda CRF250X is a trail machine, and that is
what our Service Honda 250AFX was designed for. We
set the sag, added some pre-mix and hit the trails. The
2001 Honda 250 two-stroke motor worked really well
down low and off idle, never hinting of stalling. We
lugged it and clutched it and abused it through tight
trails and up nasty climbs without issue. The 2001 motor
has good power and is smooth, thanks to the very long
and quiet FMF Q silencer. We know the bark factor
would increase with a short silencer, but so would the
noise, and we’d no longer have a quiet, smooth-powered
trail machine. Our bike didn’t have a flywheel weight,
The 2001 two-stroke engine is eight pounds lighter than the stock CRF250X engine,
and overall, the 250AFX bike is about ten pounds lighter than a stock CRF250X. Losing
the starter and other goodies helps to drop off pounds. You can order your 250AFX
with an FMF Q series or Pro Circuit 296 series spark arrestor silencer. Ours had the
FMF setup and was nice and quiet. The 250AFX is Green-Sticker eligible in California.
and while it worked well, we’d be curious to add a few
ounces to see if the bike would put more power to the
ground through the middle of the powerband.
The starting price for the 250AFX is $10,599, and that is
a serious investment. So the big question is, why would
you want to convert a four-stroke into a two-stroke? Well,
there are several reasons. Two-strokes are awesome off-road. They are easy to start, don’t stall and are light. Two-strokes are also a lot cheaper to maintain than a four-stroke, enticing riders on a budget to lean toward pre-mix.
makes a new
frame cradle to
hold the two-stroke motor,
the frame to