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news A powerful trail machine ready to tackle the hardest adventures.
Polaris unveiled the 2021 Sportsman 850 Trail Edition ATV with factory-equipped enhancements to tackle the roughest terrain. View the full article
So this’ll be long I’ll give all the background first to see my issue skip to the ***
Hey I picked up a pit bike and a foreman for 800 the pit bike was running but the foreman was locked up. Sold the pit bike but when I took the top end off the piston I only found half a piston left. So knowing the rest of the piston was down in the crankcase I knew it had to be pulled and gone thru completely.
to pull the motor I went ahead and pulled the rear end off and unbolted the front diff to pull the drive shafts and pull the motor. Now I have the motor torn down completely and have all the parts of the piston removed. I know the rod and crankshaft is shot (heat discoloration and too much up and down play rod to crankshaft).
***so I’m wondering while I have the motor apart what should I check for? I know this motor died from heat as the oil in the head smelled like popcorn. So what should I check to make sure I fix the issue (overheating I assume) and not just the symptoms (blown up motor lol).
so put simply I don’t want to just rebuild the motor to have it overheat and repeat the process after 5mins of running
Here’s some pics
I'm generally against Chinese crap. Niche pistons for instance are known to blow to pieces in a 400ex. However, I picked up a Niche pinion and ring gear for a 300FW and am pleasantly surprised that the ring gear is actually welded. The pinion in it decided to commit suicide so I had to salvage a case half and buy a pinion and ring set. Had new bearings and seals though so recycled those. Lash is really decent too. We'll see if it stays together.
Bet you've never seen a Tonneau cover that can hold 2 - 4-wheelers on top of it. This is a home-made heavy duty fiberglass truck bed cover that was used on an 2000 F-350 with an 8' bed. We have used it hundreds of times but are getting out of the 4-wheeling fun. You can waterproof with a rubber seal, not included. This leaves the area under the cover open for all your gear and firewood. It is white and in great shape. 4-wheelers NOT included.
Hey so i have a 1990 bayou 220, and its missing the wiring harness so i went online and bought a bayou 300 wiring harness by mistake. Will it work if i use the 220’s cdi box and ignition coil?
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