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  1. Heat discoloration on crank... but not overheated?

    Shop & Garage
    Hello Gurus, Cracked open an old Suzuki sled engine and thought I had found the problem with it. Overheated crank pins as visible here Then a closer look showed no such discoloration on the needles. ¨Could´ve rubbed off¨ I thought. Next, once the crank was out, a better look overall showed...
  2. 2004 rm250 Runs Hot

    Suzuki Dirtbikes
    2004 RM 250 running hot. 8 months back I rebuilt the top end with a Wisco pistion kit. The bike ran hot for a while and then seemed to break in and cool down a bit. It seems to be back up recently. The symptoms are uneven reving (pinging) and then after that it runs off...looong reving. I...
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