Lucky for me the XChallenge comes standard with electric start.
I must have stalled at least 50 times in the first 1 mile. Did
I mention I was riding on the stock tires? I’m thinking
to myself I have 85 miles of this sh**t! Whose idea was this
anyway?
Back to the bike, as I said before, the motor is based on the
liquid cooled F650GS mill, it has a chain-driven DOHC with bucket
tappets producing 53 hp at 7,000 rpm. Compression ratio is 11.5:1
and has 4 valves per cylinder 36mm intake, 31mm for exhaust.
An aluminum radiator remains intact from the F650 design and
is mounted horizontally just under the steering head, gearbox
is F650 equipment as well. The frame is constructed out of tubular
steel with cast aluminum sections on the sides, an aluminum
sub frame bolts on and an aluminum-alloy double swing arm rounds
out the skeletal design. The swing arm pivots on the main frame,
and being positioned relatively close to the counter shaft sprocket
serves to provide even faster drive train response, but also
reduces the tolerance (less loose) of the O-ring drive chain.
The 2.5 gallon (including 1 gallon reserve) fuel tank contains
the fuel pump and gives a range of 155 miles. Another carryover
from the F650 design is the tank location within the frame triangle
beneath the seat, a key factor in giving the XChallenge such
a light, nimble feel. Claimed dry weight is 318 lbs, which is
about the same claimed dry weight as the Honda XRL 650 but the
XChallenge feels much lighter and smaller. Final gearing is
15-47.
The 45mm upside down front fork provides 10.6 inches of travel
with the unit adjustable for compression and rebound damping,
compression on the top left fork cap, rebound on the top of
the right. This makes adjusting compression damping very easy,
no crawling on the ground to get to the adjustment screws. The
rear suspension employs the Air Damping System just like the
HP2.