I searched but couldn't find an answer.
I'm working on my son-in-law's 2015 Sportsman 570 which used to be mine. It only has about 350 miles on it. He was riding it a couple of weeks ago and it started running really rough. He had to really fan the throttle to get it back to the trailer. It threw a trouble code, 636, I believe. Whatever it was, it was indicating the Crank Position Sensor. I removed it and it reads about 1000 Ohms. I checked the one on my 2017 Sportsman 570 and it read the same, so I think the sensor is okay. The bike will sometimes start, but when it does it will not idle, and backfires. This leads me to believe the flywheel key has been sheared. I've read plenty of threads on the interwebs of folks shearing the key.
So, my question is, can I remove the stator housing without draining the radiator? I've removed all the stator cover bolts and it moves around a bit. I'm guessing the magnets are holding it in place. It doesn't want to come off and I'm afraid to persuade it. I can make a couple of handles and mount them using a couple of the water pump cover bolts, but I want to make sure there's not something else I need to remove under the water pump housing.
I purchased a PDF manual and have read through the appropriate sections and don't see any mention of any additional bolts or clips or anything. I really just want to get a look at the flywheel key without draining the coolant. If I need to replace the key, I'm guessing I'm going to have to drain it, but I sure hate to do so on a hunch.
Any ideas?
And any ideas on what's going on with all the reports of sheared flywheel keys? Short of not having the crank bolt tightened enough, I can't image shearing one on a bike with a CVT.
-Matt