OK we have sevrel quads one being a polaris sportsman 335, when we first go this thing it had ok power nothing like my prairie 650 but for a 335 it was ok. over the last 2 years it has been looseing power an now a hill that a 1987 fortrax 250 ( NOT AN R) will climb in 3rd gear the sportsman in low range wont make it half way up. whats wrong?

 

When is the last time you had your valves adjusted?

 

lol..... never

 

After 2 years, it may be time to get them adjusted. LOL Valves being out of speck can make a significant difference in performance. They SHOULD be adjusted every year or 100 hours