The 1986 KTM250MX features the new D igital Control ignition system :
To improve torque and smooth out the transition to mid-range, the
ignition is programmed to change the spark advance every 500 rpm . The
250MX also has the new Dell'Orto PHBE carburetor, which uses a hollow
slide to reduce turbulence and increase low-rpm power. Unlike all the
Japanese 250s, the KTM doesn't have a power-valve. A new cylinder with
moderate porting changes gives the KTM 46.0 bhp @ 8100 rpm measured at the countershaft. The five-speed transmission is unchanged for
1986.
The KTM500 has minor engine porting changes, with updated suspension. The Pro-Lever rear suspension linkages produce different ratios and
allow the use of a lighter spring on the White Power.shock. Both front and
rear' suspension are equipped with White Power Pro Kit that many KTM
owners installed on their 1985 KTMs. Forks on the 125MX, 250MX and
500MX KTMs are inverted White Power units producing 11.8 inches of
travel ; rear travel is 1 3 inches.
Rear d isc brakes are fo und o n all
t he 1986 KX motocrossers except
the KX80 and K~60 ;
Rear disc brakes also come stock
on the 125, 250 and 500cc KTM,
as well as the MXC enduro models.
The 1986 KTM 125MX is still in development stages although the front and
rear suspension and motor are ready to go. It's the frame that hasn't been
finalized yet; KTM is developing a slightly-smaller frame to lower the seat
height. Claimed horsepower is 35 bhp @ 9800 rpm.
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Only the KTM250 has the new D igital Control ign it ion system . A black
guard protects the rear disc brake reserv o ir assembly.
,.. ,
The water-cooled KTM80 displaces 78.12cc, has a 35mm Dell 'Orto
carburetor and produces 23 .5 bhp @ 12,000 rpm . Rear suspension is
handled by White Power, but the forks are Marzocchi built to KTM
specifications. Wheel travel up front is 9 .4 inches, and rear wheel travel is
9.8 inches..The KTM .80MX weighs 131 pounds dry.
