Fouling Plugs

[Big D rmk700]

Just fouled my forth set of plugs the other day, always happens when engine temp is between 50-60 degrees. Anyone else have this happen? Put new set in and sled rips ran good enough the other day after fouling set to get me king of the hill at our local hill drags.

 

[m8sandman]

mods??? vaccum leak would be a place to maybe look. have found on my quads, dirt bikes that is usually an air/fuel problem if they foul at warm up.

 

[bohner]

mine does the same thing i am on my eighth set. I have tried different plugs i have tried reving the engine to work the gunck out of the bottom but nothing has worked so far i am going on one more trip then going back to the dealer for summer to let them figure it out.

 

[shabs]

Just fouled my forth set of plugs the other day, always happens when engine temp is between 50-60 degrees. Anyone else have this happen? Put new set in and sled rips ran good enough the other day after fouling set to get me king of the hill at our local hill drags.

Are u letting it warm up to 90 degrees before you even think about hitting the throttle? They run rich untill that temp..... or is it doing it on its own sitting there idling warming up?

 

[Big D rmk700]

Sitting there idling!!