Honda SL 350




Make Model

Honda SL 350




Four stroke, twin cylinder SOHC, 2 valve per cylinder


Bore x Stroke 64 x 50.6 mm
Cooling System Air cooled
Compression Ratio 9.5;1


2x 36mm Keihin


Battery & coil 
Starting Kick

Max Power

33 hp @ 9500 rpm

Max Torque



5 Speed 
Final Drive Chain

Front Suspension

Rear Suspension

Dual shocks

Front Brakes


Rear Brakes


Front Tyre

3.50 -19

Rear Tyre

4.00 -18



Fuel Capacity

Rarely seen in Europe but a favourite with o '-readers in the USA, Honda's 350 trail uiKe was developed over several years
oiiowing its 1969 launch. In 1971 a writer "'American Cycle was so impressed that
,e wrote,

The SL is the most subtly
finished off-road bike on the market. It has a tight, elegant appearance that creates an aura of quiet mastery and command.' All this from a 320lb motor cycle painted metallic gold and silver...

In the early 1970s the SL350's engine was modified to give more torque, mainly by altering the valve timing: gains here more than compensated for a peak power drop from the 32bhp quoted for earlier models. Other practical changes concerned handling, which was improved by a 1 inch increase in trail, to 4.5 inches, and by lengthening the wheelbase 3 inches to 55 inches.

The rebound damping rate was stepped up, and filling the damping cylinders in the front fork was improved by incorporating three ball valves under the pistons in the fork legs.
A seat comfortable even by roadster standards, and extraordinary in the spartan world of trail bikes, added to the high reputation of the SL and helped to further the popularity of off-roaders in general for dual use.