If your EGT keep creaping up on a climb and you increased your main jet size, its probably the stinger end on your pipe is too tight.
As for how long can you keep it pined, on my crank shop 910 after I chand the pipes out to Jaws I did about a two min pull in really deep snow.
As for how long can you keep it pined, on my crank shop 910 after I chand the pipes out to Jaws I did about a two min pull in really deep snow.