If your carb is in good shape - especially float valve working OK, than you don't need to worry about a thing. Pri position should be avoided if you are to leave bike sit for days or weeks. Bike with fuel valve open (what prime position really is) may cause fresh fuel flowing to carb as it evaporates causing varnish buildup.
If you have problem with needle valve not closing correctly you may cause overflowing carburetor - fuel getting into filter housing or engine.
Just be mindful that petcock valve also has tendency to leak. Both valves should be checked from time to time and kept working as intended. Float valve also impacts how the bike will run (assuring proper fuel level in carb).
|