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By Yamahahahaha
I'm in the middle of repairing damage from the chain coming off of this from the previous owner. (I learned this is somewhat common on these for various reasons.)
What are you guys using to either help keep the chain correct and on the sprocket or guarding your engine in the case that it comes off / breaks?
Is there an upgraded guard that can bolt around the sprocket in replacement of the currently broken OEM alluminum?
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By hengstserepair
Howdy ya'll. I am working ona 2000 Yamaha Breeze 125. It was in rought shape when I received it and I am working through issues as they pop up. The quad had been sitting for years. I was able to get her running again, but I need your help with the following issue:
I don't trust the transmission yet and I don't want to make problems any worse. So, I haven't pushed things hard at all. Low rpms, less than 5mph in reverse.
Nuetral: Runs as expected
Reverse: She seems to be driving fine at slow speeds. Going into reverse at idle is fine, coming out of reverse back into neutral won't work (the shifter is just stuck). As soon as I turn off the quad, I am able to shift around without any issue.
Forward: It slips. It seems to only transfer power to the wheels on a smooth surface and going slightly downhill. When shifting into forward at idle, there is a clacking sounds during the transition. Shifting back to nuetral works just fine.
Other Notable Symptoms: There was old oil in the vbelt and when I was tuning the carb, it starting blowing out of the CVT cooling vent at the front of the quad. Made quite a mess. There is positive crankcase pressure due to piston blowby, that I have not decided whether or not I am going to fix (customer budget dependant). Since the oil was old, much darker than the new oil that is in the crankcase, I am thinking it seeped past a bad seal while it was sitting for years. The oil that was in it when I first got it had gas in it.
Thoughts: I am thinking maybe there is an issue with the clutch. I worry about the old oil intermingling with the dry centrifugal clutch. I was thinking my next step would be to take the cover off of the clutch and inspect it.
Let me know what you all think. Any advice and ideas is greatly appreciated. This is only the 3rd quad I have worked on and I have a lot to learn.
Lorne
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By Rockbottom
2008 400 big bear was running now will not start
have power to relay, in neutral, press start have power to starter but nothing happens starter does not turn
i have good ground at battery to frame and added ground from wire harness to frame beside batter/ frame ground
blue white wire to cdi has power with key on
I believe the neutral lock out is working since is was before i shut it down
if i put it in gear and hit the start button with key on the relay does not click or send power the starter
The 3 wires at the relay have power with key on
What should i test next?
thanks ahead
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By Admin
View File 2016-2026 Polaris Youth ATV 110 EFI service manual
Download the 2016-2026 Polaris Youth ATV 110 EFI service manual PDF for complete factory repair, maintenance, troubleshooting, and diagnostic procedures. This comprehensive Polaris Youth ATV repair manual covers all major systems including engine service, EFI fuel injection, transmission and drivetrain maintenance, suspension, steering, brakes, electrical troubleshooting, wiring diagrams, torque specifications, and factory maintenance schedules.
Designed for parents, mechanics, ATV owners, and DIY enthusiasts, this factory-style service manual provides detailed step-by-step instructions and diagrams for maintaining, troubleshooting, repairing, and rebuilding Polaris Youth 110 EFI ATV models.
Topics covered include:
Polaris 110 EFI engine repair
EFI fuel injection diagnostics
Transmission and drivetrain service
Suspension and steering maintenance
Brake system repair
Electrical troubleshooting and wiring diagrams
Oil change procedures and maintenance intervals
Torque specs and factory service data
Polaris ATV diagnostic procedures
Starting and performance troubleshooting
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This Polaris factory repair manual is ideal for maintaining and repairing Polaris Youth ATV 110 EFI models used for recreational riding, trail riding, beginner ATV training, and family off-road adventures.
Submitter Admin Submitted 05/28/2026 Category Polaris ATV
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By Mister907
Hi guys, I have a 2004 big bear 400. Last winter while plowing the driveway, I heard a loud pop from the left side of the engine. It continued to run as I looked for leaky fluid, but then died shortly after backing it up and won’t start now. The oil light comes on when I try to start it, no noise or anything else.
No blown fuses that I can find.
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