Excessive moisture in oil
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Get a motorcycle cover and a good security Chain, all my motorcycles are covered up even if they are in a covered stall or car port or garage, it keeps the dust and smog crude off the metal
Water in the oil
When I started the 170cc kit, I did a complete review of the stock bike. I have a thermocouple mounted in my Grom's drain plug. I road the bike for 25 miles, all through the rolling hills around West Bend, WI, and I never got the oil sump temps over 204'F. Around town it never goes over about 175'F. Perfect oil temperatures are in the 220/240 range. I need to know, because I didn't want the 170 Grom to have oil temp problems. I wanted to see, if it needed a cooler. So, change your oil out more often. I tend to do it every 1000 miles on my other bikes. I would do the Grom at 500 miles, no filter, and ball bearing. The spinner is not really a filter, it's an extra flywheel, because it's a single.
Have you tied Seafoam. It's a gas and oil additive, I use it on all my bikes. Bikes run better and it's a fuel stabilizer too. You can buy it at any auto parts store.
I have had the same problem on my MSX since day one.
I change the oil every 500 miles and every ride is at least 30 minutes long (80% of that is WOT).
The oil doesn't get contaminated, it just seems to be moisture in the crankcase..
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Yeah I worded that poorly, my oil isn't contaminated either, just thick buildup around dipstick area.
I guess just oil changes often to be safe, since it's so cheap.
Have you been draining this crankcase breather tube mentioned in the the owner's manual? I've had to drain mine several times but have nothing in the oil fortunately.
I'll give that a try, thanks for the suggestion!
Originally Posted by push bike
I've noticed the little clear nub in the airbox (shown above) collects a bit of water, as it's supposed to. I notice it's full after a few rides, takes 10 seconds to slip it off and dump it. The oil in mine looks fine despite a bunch of rides in cold weather.
Looked at mine on the way to work and it does appear to be full. Gonna drain it when I get home, my fingers were to cold to try and get it off this morning.
Mines got a little bit in the bottom, couldnt squeeze the circlip with my fingers though so ill have to leave it till i can get some needle nose pliers on the little sucker.