Counterbalancer/waterpump assembly. Looses tolerance overtime and once it reaches +/- .015 of slop, you will throw out the mechanical seal. Goes unnoticed till it's too late.
In my case, the counterbalancer/waterpump unit was so worn, that it ground right into the lower section of the case ever so slightly. Which caused the cast aluminum case to have a slight fracture, and run lean which caused the motor to melt down.
@@KingSalmon Thanks for the heads up just I got done rebuilding a 95 scrambler 400 I did a new top end its bored one over I didn't do a bottom end cause there was no play in the crank and I read the bottom ends are strong on these. Looked like new inside the motor it holds coolant no overheating. Outside was a different storey the whole motor was just soaked in oil but I cleaned and polished the motor up repainted the whole frame I was doing it to sell but im going to hold on to it for awhile i like the power it has. I did notice at low idle the motor moves alot more then I thought it should. A little above idle it smoothes out I put new counter oil in I read the motor movement is just a natural polaris thing being a big 2stroke? I also had to pull the motor and fix all the motor mounts and bolts. I don't like setting the idle so high where the motor stops vibrating cause then putting it into gear it grinds I guess I gotta find the sweet spot for idle I probably have it turned down to much and the motors lugging causing the motor movement.
@MrAlternation Check the motor mounts/bushings for play. Check the swing arm bushing by grabbing the rear frame bar and lift up and at the same time rock 4wheeler side to side to see if swing arm bushings have alot of play if they do you most likely need new bushing our the bolts need to be crank back down. Grab all the tires and shake them to see if the wheel bearings are good. Check your coolant. Check your counterbalance oil that's a big deal with these quads the dip stick is kind of a pain to get to if airfilter is still on. It takes a big flat head to unscrew it on the rear right side of engine. it takes 10w-30oil. Make sure tranny has fluid. Make sure rear shock isn't blown out if it is you can get it rebuilt for 150$. Other then that just make sure she starts and runs good i took the oil pump off mine and premix my gas 40-1 but make sure if the oil pump is on it she is full of 2stroke oil. I like using lucas semi synthetic.
I love 400 Polaris!
Also I call it a "slide" rather then barrel.
Round slide carb
Flat slide carb
Ect..
It's actually just the fuel needle that's different in the carbs. Old engine cylinders had 4 intake ports, 1997 and up cylinders have 6 intake ports
going to be buying a 1997 Polaris 400 2 stroke this weekend, what else should i be looking out for?
thank for that information on the Polaris 400 two strokes I have a 1999 Polaris Sport 400 and man is she fast as hell
You bet ya man
Im having issues getting mine to run correctly...hopfully its just the carb
I have a 92 trailblazer 250 and 99 scrambler 400 and I’ve had no problems w em I love the Polaris 2 strokes
Have a 98 scrambler 400 running the barrel slider numbered 1.5 is that the right one?
Steal the gearbox from that explorer and put in in the scrambler so you'll have a low-range sport quad!...from Wyoming USA 🇺🇸 👋 🤠
God this gave me a brain ake
I had a 400 scrambler about a year ago.... Im thinking about purchasing an explorer 400.... Are the explorer 400s as snappy as a scrambler?
Same engine so it shoulf
l would like to know what did you do to blow up the red 400, thx
must have ran the gas too hot
Looking for a replacement seat for my 400 Polaris scrambler
Can anybody help
I still have my original carberafer
Ehh I’ve never had a carb problem on my 99’ still needs a new speedometer new wiring for headlights and that’s about it…
Liftmasterdoorman people who build these motors run in to i quite a bit. A few people i know have had it happen a few times before.
Brain hurty
4 years later and never said what the mistake was?
Counterbalancer/waterpump assembly. Looses tolerance overtime and once it reaches +/- .015 of slop, you will throw out the mechanical seal. Goes unnoticed till it's too late.
In my case, the counterbalancer/waterpump unit was so worn, that it ground right into the lower section of the case ever so slightly. Which caused the cast aluminum case to have a slight fracture, and run lean which caused the motor to melt down.
@@KingSalmon Thanks for the heads up just I got done rebuilding a 95 scrambler 400 I did a new top end its bored one over I didn't do a bottom end cause there was no play in the crank and I read the bottom ends are strong on these. Looked like new inside the motor it holds coolant no overheating. Outside was a different storey the whole motor was just soaked in oil but I cleaned and polished the motor up repainted the whole frame I was doing it to sell but im going to hold on to it for awhile i like the power it has. I did notice at low idle the motor moves alot more then I thought it should. A little above idle it smoothes out I put new counter oil in I read the motor movement is just a natural polaris thing being a big 2stroke? I also had to pull the motor and fix all the motor mounts and bolts. I don't like setting the idle so high where the motor stops vibrating cause then putting it into gear it grinds I guess I gotta find the sweet spot for idle I probably have it turned down to much and the motors lugging causing the motor movement.
@@chadjohnson7712 going to be buying a 1997 Polaris 400 2 stroke this weekend, what should i be looking out for?
@MrAlternation Check the motor mounts/bushings for play. Check the swing arm bushing by grabbing the rear frame bar and lift up and at the same time rock 4wheeler side to side to see if swing arm bushings have alot of play if they do you most likely need new bushing our the bolts need to be crank back down. Grab all the tires and shake them to see if the wheel bearings are good. Check your coolant. Check your counterbalance oil that's a big deal with these quads the dip stick is kind of a pain to get to if airfilter is still on. It takes a big flat head to unscrew it on the rear right side of engine. it takes 10w-30oil. Make sure tranny has fluid. Make sure rear shock isn't blown out if it is you can get it rebuilt for 150$. Other then that just make sure she starts and runs good i took the oil pump off mine and premix my gas 40-1 but make sure if the oil pump is on it she is full of 2stroke oil. I like using lucas semi synthetic.
how can I get in touch with the guy that rebuilt the yours
Here's the guy--- polarisatvrepair.com/
how much was is for the new block and everything
In all, around 600 bucks.
If it's just a top end then it's around 200.
Carbetr