VOL. 55 ISSUE 26 JULY 3, 2018 P57
A
s far as changes from 2018 to 2019,
there are many for both the two-strokes
and four-strokes. The 250 and 300 four-
strokes feature a lighter clutch, updated cylinder
head, revised intake and exhaust camshaft pro-
files, and larger valves. Sherco claims the 250
and 300 four-strokes have more torque at higher
rpm. The 450 gets higher compression (11.8:1
to 12.3:1) and a re-balanced crank. The 250 also
gets a bigger piston and a shorter stroke.
The 500 is a brand-new model, which is
based on the 450 but with a larger bore.
The 250 and 300 two-strokes get a new
top end with improved cooling and a re-
worked and more compact electronic pow-
ervalve. The clutch is also lighter, and there
are new settings for the carburetor. Electron-
ics have been significantly upgraded, as
well. The 125 gets a new piston to improve
engine reliability. CN
