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Snow in Air Box - Help

Rode the snowy's over the weekend. No deep snow problems, as there wasn't any. But I still have a bogging problem on the top end, right after it sits for a few minutes. Water off to carbs, not overheating, takes a good 10 minutes to clear up. Still not hitting 10,500 in the mountains either. Anybody? Any idea's?
 

mmwildman said:
Rode the snowy's over the weekend. No deep snow problems, as there wasn't any. But I still have a bogging problem on the top end, right after it sits for a few minutes. Water off to carbs, not overheating, takes a good 10 minutes to clear up. Still not hitting 10,500 in the mountains either. Anybody? Any idea's?

Mine does the exact same thing, when i'm up at around 6,000 feet in our riding area.Always after I sit for a while or even after just idling no top end ,some times it clears up within a few seconds and will hit 10200rpm's but alot of times the initial bog will clear up but will only rev too 9000 then slowly creep to 9500.Seems like a snow problem but there wasn't any under my foam in the air box.WTF?
 
snow in airbox

Early in January I was out riding on a cold day -28C, and there was about 3ft of new snow. The airbox foam froze which I cured then the machine started running on two cylinders ,I was very worried. Took the airbox off and inspected the engine compartment and discovered that one of the large carb vent lines was blocked with snow and ice. Cleaned out the lines and relocated the carb vent lines toward the exhaust heat shield were there will always be heat. Carefully zap tied the lines in place not to crimp the lines, and to prevent the end of the vent line from being plugged by moving and touching a part of the machine. I am using a piece of nylon material at the front of the airbox to block out the snow. There is no weight added , the machine packs less snow weight. The side airbox snaps and a couple of zap straps hold nylon in place. After these two simple changes the carbs haven't iced up, the carb heat lines can stay off and the engine has not missed a beat . And that is the win-win.P.S. if the carb vent line blocked on a 2 stroke you have a instant burn down!!
 
Anchorage Yamaha dealer says to block off the area around the Holders in the bottom of the tool box area. and should help stop the bulid up of snow in your Air Box.

the holders look like a pop can holder. and they sit in the holes you need to cover.

hope this helps,
 


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