MtnMax600
New member
So I used to have a 2003 viper mountain that was wrecked but the motor was still strong. I found a guy locally selling a 03 viper mtn with a blown motor, 960 miles. Perfect. His motor blew the PTO cyl and cracked the lower case. So I swapped my good motor in. Since I dont know what caused his to blow I used my carbs, my powervalves and servo (since his were FILTHY) and my oil pump since it was still attached to the motor.
I cleaned the carbs and powervalves before installing them. The motor fired up without much trouble but it isnt idling for beans and after it was running for a few minutes I noticed it was spitting a good amount of unburnt fuel out of the exhaust.
Is it possible there is a cylinder not firing? I am currently using the coil packs that came from the blown sled. Something in the carbs I screwed up putting back? I am pretty sure the gas is coming from the PTO cyl.
Ideas?
I cleaned the carbs and powervalves before installing them. The motor fired up without much trouble but it isnt idling for beans and after it was running for a few minutes I noticed it was spitting a good amount of unburnt fuel out of the exhaust.
Is it possible there is a cylinder not firing? I am currently using the coil packs that came from the blown sled. Something in the carbs I screwed up putting back? I am pretty sure the gas is coming from the PTO cyl.
Ideas?
bad cdi maybe?
first thing I would do is swap the coil packs, it could be a bad sp. plug boot or weak coil.
Ditto on the coil packs, plug caps. Maybe try feeling the pipes just after starting. Should be able to figure out which cylinder(s) aren't firing.
YAMAHIZAL700
New member
Make sure pilots are real clean and not blocked from bad fuel. Even if you cleaned them they may have gummed back up. Before I had my sled going this year I had clogged 2 of the 3 pilots and sled was acting like you say, tons of un used gas and oil coming out of the pipes. Make sure when you clean the jets use use a piece of fine wire to really scrap away any unwanted grime. Every time I go to start my sled it like clock work starting on the third pull.
make sure your carb vent is plugged into the air box, I know, its simple but it seems to get forgotten alot, even by myself a few times.