Starting Instructions

A) Always have your motorized bike at least 10 feet from any fueling area before attempting to start it!!!

B) Never leave the tank fuel cap off after fueling as rain water will contaminate the fuel and cause engine failure.

C) Do not try to start your bike on the kickstand! 

1. Open the fuel valve. Small lever pointed down with fuel line is in the open position.

2. The idle adjust screw is located on left side of the carburetor next to a small vent

that some people call the "tickler" button. Generally speaking, leave this alone! This Carburetor has a choke lever; the "up" position is "choked".

3. Pull the handlebar clutch lever inward, to disengage the engine from the rear wheel.

4. Pedal; (down hill if possible for first start)

5. Let out the clutch lever all the way out and continuing to pedal. The result is a direct engine hook up with the rear wheel via chain and sprocket and the engine will now start spinning,  Pedal until motor starts as the engine begins to sputter and try to die, take off the choke and proceed. Accelerate slowly at first, and then wind

her up some, be sure, absolutely sure, to not "Lug" or overheat your new engine.

6. Twist throttle to increase speed, reverse twist throttle to decrease speed. To

Stop, disengage clutch and apply brakes. To take off from any stops, pedal and release clutch while opening throttle.

7. If, after stopping, the rpm needs adjusting, turn the idle adjust screw (left side of carburetor) in (faster) or out (slower) slowly to obtain the proper idle speed of  about 1400 rpm +/- 100rpm.  Run your bike around the block a couple times, and come back and check ALL nuts, bolts, connections, and engine temperature. Many people say "Do not exceed 15 mph or 30 minutes continual running for the first

50 miles during engine brake-in". I have not found this to be true, my experience is,

mix your fuel correctly, and do not overheat, or lug the engine during break-in, OR EVER! 

Engine will develop more power after break in. The Skyhawk series (roundhead in particular) will begin to break-in almost immediately.

 8. To stop the engine, push Kill switch and turn off gas valve at tank. Turning off the gas will prevent fuel from being siphoned from tank. Warning Note:  Never leave the tank gas valve in "open position" when engine is not running or the bike is in storage.

9. Before and after each ride check all mounting fasteners, including cylinder head bolts, axle, fenders, and brakes.

10. Warning Note:  Engine lock up or piston seizure due to improper gas / oil mixture will not be covered by factory warranty. It is the responsibility of the owner/operator to make sure the gas and oil is mixed correctly.

DISCLAIMER:

Engine Warranty: 90 days from shipping. It is new and guaranteed to be complete and in good working condition when received. If you have any problems or questions email mike@simpsonmotorbikes.com or call us as soon as convenient 916 383-8612.
  Thanks, Mike