I just bought a 1999 335. Got it for 1200. It looks like new. I'm having a problem with it and would like some help. It runs fine until you give it gas. It will bog down. It will run fine at half throttle. Idles fine Does anyone have a suggestion to try Thanks.

 

Always check/replace spark plug along with a general service if it hasn't been done. Sounds like jets possible stopped up,plus not worth taking a carb apart just to clean it! May have a worn needle and seat also. Just install a new carb kit and eliminate any carb related problems.http://www.ebay.com/itm/Polaris-Sportsman-335-1999-2000-Carburetor-Carb-Rebuild-Kit-Repair-/201120379848?pt=Motors_ATV_Parts_Accessories&hash=item2ed3b573c8&vxp=mtr If you haven't worked on carbs here's the pdf fuel section from the manual.https://www.google.com/url?sa=t&rct=...,d.aWw&cad=rja
Plus a cheap manual so you know what to service.DOWNLOAD 1999-2000 Polaris ATV Repair Manual ALL MODELS - Download ...

 

Thanks for the info. I will check all that out.