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  1. 1993 Trail Boss 350L issues

    ATV Repair and Maintenance
    Have a 93 350L 2x4 that is having issues starting and running. I had an issue with fuel leaking out of the carb overflow hoses. Determined that the float was stuck so I pulled the carb cleaned the bowl and it fired up and ran for about a day and a half. My son was riding it and then it died on...
  2. 1994 250 Trail Boss Carb setups

    ATV Repair and Maintenance
    WHAT IS IT WE ARE DEALING WITH? 1994 Trail Boss 250 2WD Bought this awhile back with a cracked carburetor. Replaced the carb with the supposed direct replacement (thanks, JMC) The carb they ordered was a Mikuni Round Slide VM Series Carburetor 30mm Bore VM30-83 Bore Size: 30mm Spigot O.D...
  3. 1993 Trail Boss 250 Carb Help

    Polaris Trail Boss
    So the original Carb was lost when I bought the quad, so I went to my local store (JMC) and they advised me that the Mikuni Round Slide VM Series Carburetor 30mm Bore VM30-83, was the direct replacement for that machine..... I bought 2. (I have two of these second one still needs work) Well the...
  4. 2000 Trail Boss 325 wont start

    ATV Repair and Maintenance
    Hello all, I have a 2000 trail boss i rode for a year. it ran very rich (plug black and exhaust smelled of gasoline) once it got warmed up the engine would bogue down or hesitate after 1/2 throttle. It would shut it down on its own eventually and was unable to restart it again. i would wait a...
  5. 1990 Trail Boss 250 Idle

    Polaris Trail Boss
    My 250 2x4 runs great, but will not idle. In the past, once I drove it for a while it would seem to idle. But now, I can ride for 3 hours and when I stop it will shut off. It doesn't even need gas to stay running, as long as I just barely touch the throttle, it will stay running. I am...
  6. Trail Boss seat on Big Boss body - Anyone tried this?

    Polaris Trail Boss
    I am trying to restore to a good useable condition a 1991 Big Boss 6x6 250. I bought it without a seat, and it seams the seats are nearly impossible to find, even at salvage. Has anyone ran into this issue and tried to retrofit a TB seat onto the frame? I don't have exact measurements, but it...
  7. 1985 trail boss 250

    ATVs For Sale
    looking to trade 1 complete atv as well as a 95% parts machine. Both have transmission problem. right side gearcase is cracked on one and swing arm mount is broken on other. just can't spend the time hunting for the one part to get this old gal running. was running when it broke down has been...
  8. lost all hope

    Polaris Trail Boss
    I am the owner of 2 trail boss 250's from the 85-87 era. The older one of the pair ran when I parked it due to the transmission failing. Bought the parts machine a year ago it never ran but suffered the same failure. Now I have a nice original trailboss I can't rideand a ton of parts. I am...
  9. Converting a 89` Trail Boss 250 4X4 to a 4.7kw Yanmar DIESEL

    ATV Performance Modifications
    As nice as a 2 stroke gasoline trail boss is, It`s not for me, I have been working on diesels for the past 5 years and they have been shown to be superior to gasoline in every way EXCEPT speed. No a 4.7kw diesel will not beat 7000+rpm the Polaris engine puts out, but I would like something with...
  10. 92 Trail Boss 250 4x4 Fuel and Oil *Newb Alert*

    ATV Oil, Lubrication & Filter
    First time 2 stroke owner. Haven't had a quad in 12 years. Purchased this two days ago on a whim after seeing it for sale on the side of the road. It really nice shape. Sorted some carb issues with a good cleaning. Do you have to mix anything with gas? (Didn't think you did, but saw...
  11. I need to find out for sure what year I have. Someone help!

    ATV New Members
    I have picked up what I was told was a 86 trail boss 4x4, but I am having a hard time verifying that with what little info I can find. The serial number is different than the ones I have found online that always starts with a "w" my Vin number is 16442373 down on the frame by your left calf...
  12. 94 Trail Boss - Battery recommendation?

    ATV Repair and Maintenance
    Any recommendations on brand / model of battery for a 1994 Trail Boss? I had a Bike Master battery for about a year and it won't hold a charge, now. In reading the sticky thread about battery maintenance in this section of the forum, it's obvious I wasn't maintaining it properly. I'm not opposed...
  13. Converting 1999 Scrambler 4x4 to 4 Stroke

    ATV Performance Modifications
    The problem I am facing is that I have a 1999 Scrambler 400 that the motor is shot top and bottom. I have a 2000 Trail Boss 325 4 stroke that is in good condition. Is it possible to put the Trail Boss motor on the scrambler. I have all the components of the trailboss if I need any electrical...
  14. bigger tires for 13 trail boss

    ATV New Members
    Hey Everyone, I'm New To this Group But This Year I Bought A 2013 Trail Boss 330. I Am Now Thinking About Getting A Set Of 25X11-10 Mudbugs For The Rear. I Plan On Going Up Two Teeth In The Rear. My Main Concern Is STock Tires Are Only 20" And Mudbugs Measure True To Size 25" Big Difference...
  15. New 350l trailboss project

    Polaris Trail Boss
    I got this 1991 trail boss 350l 4x4 off of a trade not running it needed the cylinder hoaned, now that I have everything ready to reassemble I am concerned about the oil injection. My buddy who has been helping me with it has been telling me to prevent any issue in the future to delete the oil...
  16. 87 trail boss oiler cap

    Polaris Trail Boss
    My 87 trail boss oil cap cracked. I plastic welded it back together and upon screwing it on the tank it fell completely apart. Is there another cap from say a car/truck Or different brand quad that would fit it? It seems that everyone on eBay wants to sell the tank and all. I don't want to...
  17. XP transmission/frame question

    Polaris XP
    Hey folks, Im new to the forums but have been reading forums from this site for a while now. I was wondering if a 1993 250 trail boss 2x4 transmisson will fit the bolt pattern of a 95 XP 4x4. Just wondering because I can get an XP at next to nothing but the tranmission is out and have a 250...
  18. I need lube specs for a 93 trail boss 250 4x4

    ATV Repair and Maintenance
    I need a list of all fluids and the amount needed for a 93 trail boss 250 4x4. All except for gas, brake fluid and oil injection. Please leave pics of the fill locations if available. Never owned an atv. Have a 2000 Indy 500 Xc/sp tho. Absolutely love it. Hopin their atvs are just as reliable...
  19. 87 Trail Boss missing

    ATV Repair and Maintenance
    87 trail boss runs great. (Or so I think, but I am quite the novice at motors!) My father in law and brother in law said it sounded and felt like it was "missing". I don't know what that means or how to begin fixing it. Also. It will idle fine until it warms up then it won't idle. Starts...
  20. 87 trail boss 4x4 exhaust

    ATV Repair and Maintenance
    I have an 87 trail boss 4x4. Is there a gasket of some kind supposed to be between the U exhaust piece and the muffler pipe? It is leaking smoke there. There was not one when I took it off.
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