killercanuck,
I liked your song...lol
I found some good info about the Walbro WT603 on the Goped sites.
Once the fuel tank arrives, I'll have some fun hooking it all up & testing...
-What I found-
"Carb adjusting
Tuning of the Walbro carburetor requires patience, this is a high performance modification. Do not expect to bolt the carb kit on, set it to the initial settings, and have it run perfect. Walbro carb tuning is affected by atmospheric conditions (i.e. altitude, air temperature, humidity), other engine modifications (i.e. pipe, reed, porting), gearing, and gas/oil ratio. Set the carb to the initial settings, 2 turns open on the high speed and 1-1/2 turn on the low speed. You will need to turn the screws clockwise until they lightly stop, do not over tighten. Then back out the screws to the initial settings. When fine tuning, adjustments should be done in small increments, 1/16th of a turn. Plus, you need to pay close attention to the changes that are made. If an adjustment makes it run worse, then turn the adjustment screw the other way. It is always better to first adjust richer, screw out, then adjust leaner. Running too rich will not hurt the engine, it may only foul a spark plug. Too lean of a setting can result in a piston seizure, damaging the piston, rings, and cylinder wall. The low speed screw will also affect the idle, if the low speed is set too rich, it will not idle.
Pocket Bike Walbro WT-603 Reed Assy Carb Kit
They dismantle the old air filter, carburettor and the intake manifold. Clean the Crank Case from the old casket.
Mounting the Reed Assy with the Gaskets.
Install the throttle cable into the carb as shown. Insert the cable into the barrel and hook the end of the cable into the swivel on the Walbro WT-603 carb. Be sure that the throttle cable does not come in contact with the exhaust pipe or that it gets kinked when the bars are turned in either direction. Bolt the carb and velocity stack onto the billet manifold using the supplied 5x50mm allen bolts, lock washers, and flat washers. There is no gasket in-between the carb and velocity stack, as the carb has an o ring.
Install air filter. You will need a 1-3/4” clamp on style filter when using the velocity stack provided. Install fuel lines with the supply line feeding the multi-barbed fitting straight out the bottom of the carb and the return line connecting to the Tank Cap. This carburetor requires that a supply and a return line is used. Plugging the return line can result in the carb not being able to be tuned properly. The clear bulb on top of the carb is a fuel circulation pump, not a primer. This will not pump fuel into the engine, it will only fill the circuits in the Walbro carb. It is best to pump this bulb a few times before starting a cold engine, making sure the bulb has fuel in it."
-Lowracer-
