I've had my dad's viper in my garage for a few weeks and went to look at the track yesterday. Tipped it over on its side and gas comes falling out of the exhaust. It was started once and just sitting in the garage. Is it leaking all the way through the motor and out the exhaust? Bad fuel pump, or dirty carbs? It has done this before a few years back. Replaced the carbs and fuel pump and it went away. Is it likely a dirty needle? Don't really want to do both again...
super1c
Super Moderator
Heres one. My bet on the check valve. https://totallyamaha.net/showthread.php/103944-Oil-pump-line-check-valve-allows-gas-to-leak-out
It appears to be leaking and filling the engine. It would have to if it's going to come out the exhaust...
Hammer Down
Member
O-ring on the needle and seat. You don't want to get hydraulic lock and bend a rod.
replace the O-rings and with the ethanol in gas it eats up the rubber parts, not too mention just the age alone of the parts. pull carb rack and go thru it.
Thanks guys. Once I fix the carbs, can I just pull the plugs and turn the motor over slow to get all the gas out? Will that hurt any of the seals?
Double check the direction of that check valve, trust me they dont run long if its in backwards.
extremeviper
Member
Had a Vmax that did that, bad fuel pump check for gas in the pulse line to the fuel pump.