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If low performance was the original reason you took it to a repairer, it is clear they have failed to discharge their contract with you and you have grounds for complaint and to expect the repair completed for little or nothing extra.

There are a number of possible reasons why an engine that runs fine would be down on power and if the fuel system really needed that big clean out, it could still be fuel related. A carb and fuel system that was in a bad state often needs cleaning a couple of times, especially if water was a problem.

Other possibilities are a strangled intake, a strangled exhaust, low compressions especially due to bad intake valves or bad valve timing.
Another (unlikely) possibility is that of ignition timing which will likely be electronic with programmed advance characteristics. It is unlikely but it is possible the programme could be damaged leaving the ignition timing too retarded at speed to produce proper power.

It is also worth considering things like tyre pressures, binding brakes, wheel alignment...

ATVs | Answered on Oct 27, 2018

small lever along the side not sure which one that you lift to release it

ATVs | Answered on Oct 25, 2018

Hi my atv 2000 model 325 the bike ideas just fine mut when i put on the air box and rev the bike it just dies out and some time shut down i have rebliud the cab but it does the same thing

ATVs | Answered on Oct 24, 2018

Well you may have already thought processed these ideas.....if it's a new sound that you have not heard before or one that's been developing,that you have been keeping an eye on, then it could be a failing or about to fail mechanism, if it's been a sound from the start of your ownership then it could be a mechanism that is faulty from mfr. And may or may not have a recall, but enough vehicles with a similar symptom might have had repairs from dealers and you may be able to get some info from the dealer,if not seek out a motorcycle mechanic,check your ownership manual,hope this helps

Polaris ATV | Answered on Oct 24, 2018

Only with a complete tear down

ATVs | Answered on Oct 24, 2018

This model has a built in safety feature , when the oil gets low it goes into limp mode to protect the motor ,
check your fluids , most of them do burn a bit of oil

ATVs | Answered on Oct 22, 2018

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