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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
We are starting this topic so that members can share their view about ATVs; what they are used for, types, etc. This topic is intended to help new members and visitors and generally those that don't know much about ATVs and would like to learn. So anything you can add to this topic that you feel would benefit a new comer, please add a reply..
Below is a quote from a response to similar question from yesterday:
"Easiest thing to check is trash in the main jet. if it idles fine, then the idle circuit and low speed jet is clear. if it bogs off idle that's when it's transitioning to the main jet."
I will go ahead and open up the carb and check the main jet, but please respond to this post as if the main jet is squeaky clean.
Below is my post:
Only starts and runs on Full chock.
Does not matter what position I have my "mixture" screw. Tried it at zero, 1 turn, 2 turn, up to five turns. Spent a few hours confirming that the position of the mixture screw does not resolve issue.
Runs great at idle and if I slowly engage throttle, it will rev up as expected. But, quick rev up or when I am trying to drive it, it spits and sputters and looses power.
I also use a propane bottle and did not find any obvious leaks, and the vacuum port is hooked to fuel peacock and I also made sure to simply block the port with my finger to see if that would resolve the issue.
New Carb (after market), New Coil, Fresh Gas. No leaks at manifold boot, hot battery. Good gas flow. Runs too good to be a valve issue, or cylinder, great compression.
I can move the choke out a tiny bit, and it will still run, but will still bog down when I try to power it up.
I also have a 250 trail boss Polaris that I require to run at full choke, but it has power at all throttle potions.
I suspect it is running rich as the choke is on, but will not run with it off.
Any details would be appreciated.
Saw this in the news...was this anyone here????? 🤔
13 ATVs and dirt bikes impounded from N.J. wildlife area. Riders face list of charges.
State officials charged several people with various violations and impounded their ATVs and dirt bikes last weekend from the Greenwood Forest Wildlife Management Area in Ocean County, authorities said.
Police officers with the state’s Fish and Wildlife Conservation were investigating illegal off-road vehicle use in the management area on Saturday, July 25 when two ATV riders tried to flee, officials said.
When officers caught up with them, they issued summonses for criminal obstruction, interference with the duties of a conservation police officer, and violations of wildlife management area use. The two ATVs were impounded, police said.
The next day, a group of ATV and dirt bike riders from northern New Jersey drove past several “NO ATV” signs posted in the wildlife area known as “clay holes.”
Clay holes, or “blue holes” are former gravel or sand mines filled with water. They are popular, although dangerous, destinations for teenagers and adults looking to beat the summer heat.
Officers issued summonses to the riders for illegally operating off-road vehicles and for driving unregistered vehicles. They also wrote tickets for illegal swimming, possession of alcohol and entering a restricted area.
In all, 13 ATVs and dirt bikes were impounded. The owners are facing fines starting at $274, and impound, towing and storage fees of at least $300, conservation police said.
In a statement, police said “only registered, insured, street-legal vehicles are permitted in Wildlife Management Areas. Vehicles may only be operated on established roads and parking areas.”
This is from: https://www.nj.com/ocean/2020/08/13-atvs-and-dirt-bikes-impounded-from-nj-wildlife-area-riders-face-list-of-charges.html
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