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2005 sportsman 800 efi issues

Lph008

By Lph008
in Polaris ATV Forum

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Lph008 Newbie

Lph008

Posted
Posted

Recently picked up  a 2005 sportsman  800 efi. The issue it had when I bought it was really low idle and rpms wouldn't go over 4k. Top speed was only 30 mph and basically had no torque. 

What I found when I tore into it was.  Throttle  position  sensor wires were broken. So I replaced the tps sensor and calibrated it, also I spliced in the upgraded obt  harness for the tbap sensor and also replaced tbat sensor.  It now idles almost perfect,  still surges once in awhile.  

I also changed all fluids, replaced belt, clutch buttons seem to be good and also the clutch rollers. But I still have the same issue it has no power/torque. Rpms are currently hitting over 6k but it won't go over 30mph, acts as if that's the most it has lol

Any help is appreciated 

quadmaniac Mentor

quadmaniac

Posted
Posted

It sounds to me like it's not moving into a higher gear ration, shifting issue. I'm not too familiar with the sportsman but if there is a high rev and low speed, looks like its in a lower gear. I'm assuming it's electronic shift and you have it in "H".  Maybe there is a shift sensor?

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