2008 Vento V Thunder Classic Cruiser

whats finny about two cylinder the one which is running could be the the problem but first access if both pulser coil are ok then check the timming ,measure compression of both cylinders

V-Thunder Motorcycle face

carb is dirty and varnished--get a haynes or clymer manual and service it

Possibly the gas has flooded out the carburetor. Happened to me.

I don't know if it's the vacuum fuel pump leaking gas or the carburetor valves sticking slightly open. My solution was to have an on-off petcock installed upstream of the carburetor, just in front of the right side chrome side plate. I turn off the gas whenever I park the bike. So far that has worked, although I have other (unrelated) problems with this bike. The mechanic had to dry out the carb and check the crankcase oil in case gas had leaked into it.

This bike has a petcock system that is always on. It has normal and reserve positions (down and up) which let gas flow to upstream of the fuel pump and then a center prime position which feeds directly to the carburetor, in case vacuum from the starter cranking doesn't drive enough gas through the fuel pump, after the carburetor has dried out from sitting idle.

You check here? http://www.vento.com/web/pub/usa/moto_detail.asp?zone=EUA&Id=103&moto=V-THUNDER%20XL&cat=Cruiser

Normally, if only one cylinder is running, I would be checking electrical first then fuel, not valve clearance.

I assume you are going from bike to bike, it is always better to recharge your battery, but it is positive to positive and negative to negative. Make sure your terminals are clean too, it wont effect the jump, but it will allow your battery to recharge.

Check Out www.partsforscooters.com should have the parts you need

www.scrappydogscooters.com is carrying parts for the Vento V-thunder and Colt. Your starter clutch is likely failing.