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Hello, . Could you please link me to the repair manual for a 2000 Big Bear, yfm400fw aircooled with oil cooler,, not the liquid cooled yfm400fwA(m) I have found on this thread a few times. My Vin is 5Y4AH06Y41A000xxx Thank you
My 500EX motor was already broken in and heat cycled. It was sitting for a month with an occasional start and idle. After a hard ride at a mx track I checked my oil level with engine oil temp at 250* and the motor shut off. The temp never went higher than 250* (cooler works great!) The oil was near the top of the tank. I let it cool down for an hour and the oil level was at the top of the crosshatch section (max full). I went back out for about 20 more laps and went back to the staging area and the oil was seeping out of the dipstick o ring. i have an aftermarket dipstick with a temp gauge on it. I removed the dipstick and oil started to overflow. I havent ridden it since then (no time) but checked the oil and its back down but above the full crosshatch area. I dont smell it but could it be possible that gas ended up in the motor from a sticking float. When I towed it to the track I forgot to turn off the petcock and actually left it on reserve. its now shut off. after about 40 laps I have about 3/4 of a tank is this excessive or ok?
If you have liquid cooled or an oil cooled atv, here is a easy tip about cleaning the out side of the radiator or oil cooler.Especially if you have a fan on it. Take the nozzle off you garden hose and spray the radiator or oil cooler from the back side. Opposite direction of air flow.I was talking to a Honda mechanic about 5 years ago, they were having to replace Ruby trannys because of mud and dust plugging the fins of the radiator. I told them about how my dad cleans the radiator on vehicles. To make a long story short they told a guy who was on his 3rd tranny about that. He rod in nothing but mud. He tried this method and it works really good. I also found out it helped my friend with his Polaris's over heating problem. Dust was plugging it up. Hope this helps someone out there. We spend are had earned money on our toys. Hope this helps make someones quad last longer. Hope everyone has a great weekend and gets some riding time in!!!!!!!!!!!!! :biggrin: :wink: