top end bog

try disconnecting VES hoses (each VES port has a hose that goes to a T and connects to the solenoid; disconnect from the port) and use a piece of gasline to connect the VES ports together...this should tell you right away if it is a solenoid problem...if you find that it is, you could replace the solenoid, leave the VES connected together or simply cap off each VES independantly.

Also could check your bellows; you might have a hole in one or both.

lpylat said:

Thank you for the suggestions....bellows looked ok...sounds like solenoid issue. Can i bypass and run w/o solenoid working and not worry of same failure, is that recommended?

Click to expand...

yes.

cap the VES plugs individually, leave the solenoid as it is (plugged in the wiring harness) and remove the rubber lines off it and trash them. and leave them like this from now on...

you can have a VERY small hole in the bellows and still cause this issue, but since this is the easiest thing to check, do that and report back..

theres lots of things that can cause your problem.

Gonna give this thread a bump, I am having the same issues. My bellows are good and the valves are capped off. I did notice that my valves are quite loose in the bases that bolt to the cylinder tho. It runs fine when I shut it down for 10 mins or so but after it warms up I have a bad high rpm bog. the most I can go at wot in the powder is a quarter mile. When im on the trail and am hard on the throttle it will do the same. The weird thing is when the bog happens I take it easy on it for a short while then it will be fine again... till I rag on it.... Need help with this, tried to describe the best that I can. 2005 RMK 151, TM3, 17 hours on the engine.
Thanks