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By Susan Makowski-DeGraw
My quad runs, it starts up runs for about 10 minutes and then it dies if you let it sit for 10 minutes it’ll start back up ride for another 10 minutes and then die again, trying to figure out why it keeps stalling
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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
Hello ladies and gents. Just picked this guy up in October and getting around to doing the required maintenance to make sure everything is right before any long rides or work is done.
Some background: I am I believe the 4th owner, (however the 3rd didn't actually ride it). It has unknown hours or odometer due to what appears to be a common issue.
I have noticed the fuel gauge doesn't work (just keeps flashing empty),
I did come across a google search that mentioned these were a common problem but was fixed by replacing the dash (seems like overkill) and another post mentioning someone attempting a fix.
Any particular issues on these quads to pay attention to beyond the dash ?
Going to be replacing the rear tires, oil change, filters and plug. Anything else I should do with an unknown history such as diff flush/change ?
I believe there is a service manual here but I need a few more posts. Hopefully this post will drive some answers and more questions I might have. Thanks!
Hey guys, Im new here but I recently Picked up a '99 Foreman 400 that apparently just had a top end rebuild. It blows white smoke like crazy and ticks/knocks and seems to follow the rpm's. I haven't done to much trouble shooting yet, It starts and runs like a champ and has good compression. I was just wondering if anyone has any suggestions as to where to go.
Oh ya the top end rebuild the guy did was according to him he honed the cylinder and replaced the piston and rings, my fear is an ovaled cylinder?
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