Do you own an ATV? Join our Forum!
As a member, you can post in our forums, upload your photos and videos, use and contribute to our downloads, create your own member page, add your ATV events, and even start your own ATV club to host your own club forum and gallery. Registration is fast and you can even login with social network accounts to sync your profiles and content.
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
So yesterday I picked up a 07 polaris sportsman 800efi stealth edition for 3k. Will lead a pic ltr. In good shape. Here's what's wrong with it:
The rpm needle doesn't work just like my other sportsman... not too worried ab that.
The motor doesn't sound like it's running quite right and doesn't feel like it has much more power than my 500. I'm thinking it needs a tune up and some fresh oil.. but also it feels like it's running rich. It's a little buggy when you goose the throttle and sometimes farts when you let off (like I little backfire out the exhuast). I'm gonna check timing and valave clearence on the motor first but thinking of putting a tuner on it? Anybody got a suggestion? Mainly looking for more power.
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.
Safety Is A Concern For Kids ATVs
The family is into racing ATVs and now the children want to get in on the action. How do you start with someone who is too young to drive a car, but yet sees other children their own age charging through the woods racing an ATV? A tough decision for parents, but with a lot of planning and instruction your kids ATV can become a reality.
Safety should be your first concern before getting the kids ATVs for their own use. You should plan on doing your research to make sure that you get the best kids ATV available for their age group and size. The research should include surfing the web and also by reading Consumer Reports—both of these will provide you with a tremendous amount of information on kids ATVs.
It is recommended that the youngest kid ATV riders should have an ATV that has an engine with no more than 4.3 cubic inches. There are not too many choices at this size for kids ATVs, but you want to ensure that your child is not riding a machine that it too large for them to handle.
As a concerned parent, you should check into the ATV Safety Institute. This group offers safety courses all over the country. The experienced instructors will teach you and your kids about pre-ride inspections, warm up exercises, braking, turning, and shifting. They also teach you about clutch and throttle control and about the importance of body position and simple maintenance. In addition they cover riding techniques and how to tackle obstacles, hills and different kinds of trails. All of these issues are important safety issues for your kids ATV riding.
So, what are the features will your kid's ATV have? One company has an experienced team of ATV enthusiasts that work with you on your kids ATV to hand select the perfect one. Each ATV they have is designed with safety in mind and they offer a 4-point safety system which includes a throttle limiter, an emergency kill switch, a safety kill tether and a remote kill key. The kid ATVs are safe and they come with a 4 stroke engine, headlights, an electric start and disk brakes. This company that focuses on safety with kid ATVs is Motorxtremes. They want to make sure that every kids ATV is safe and that the rider follows all safety precautions.
You should make sure that your kids ATV comes with all of the necessary additional safety equipment to make their ride as safe as possible. Every kid ATV rider should have a helmet with a full-face cover, goggles to keep dirt out of their eyes, gloves with finger and knuckle guards, a shirt with long sleeves and safety pads for their chest, shoulders, elbows and knees.
Make sure you and your children know the rules of riding ATVs. While you can not ensure that your kids ATV rides will be completely accident free, you can help them by providing the best additional safety equipment available.
Recently Browsing 0 members
No registered users viewing this page.