My 2003 polaris predator 90cc will start for a few seconds the power sports shop said the oil pump isn't working but it's all still hooked up now when u give it gas it boggs and dies could I be overloading on the oil it's also mixed in gas tank and smokes like crazy plz help just had top end rebuilt daughter wants to race it but can't keep it running

Hey Anon, READ this over and over.. then read it again...
First, decide whether you are going to run an oil pump or not. I would recommend NOT running one if you are going to race this ATV.. properly premixed fuel/oil will never fail.. an oil pump can/will/HAS...
Remove and plug/seal all oil passages to and from the oil pump, seal the oil entrance connection to the cylinder with a good gasket sealer -NOT SILICONE - gasoline breaks it down!!
The only jets in a carburetor that ever need replacing, under normal situations, are the needle jet/jet needle combination-these wear out and are replaced as a set! There is no need to "re-jet" an unmodified engine until you get approx. 1000ft above sea level, then dropping the main jet ONE size usually works..(sometimes only raising the jet needle circlip two notches works if the bike isn't ran wide open for long distances).
NOW - - You decided to remove the oil pump - Drain all the gas out of the tank.. have a QUALIFIED PROFESSIONAL clean and set the carburetor! Run a premix of QUALITY two-cycle oil at 24:1.. this WILL protect your engine under all/racing conditions!! NEVER- -NEVER try to get your engine running cleaner by reducing your oil mixture!!!! Always use the same oil mixture/ratio - spark plugs are much cheaper than pistons!!!! FIND a great two-cycle engine tuner that can "read a spark plug"....It's hard to find a really good two-cycle tuner than can actually "read" a spark plug....
I can tell if your timing is too advanced or too retarded, if your oil mixture is correct,.. if your jetting is correct.. your combustion chamber area is correct,...ALL by looking at your spark plug!!
.... I see amateur "tuners" and guys that call themselves mechanics try to get a two cycle engine running cleaner by reducing the oil mixture - (adjusting the oil/fuel).. and eventually end up frying the engine.. and they can't figure out why>>???
DO NOT mix more than you are going to use each time!!... (use the left over to kill weeds).. DO NOT put it in your vehicles - IT WILL (burning oil) clog your catalytic convert!!
Have you done any modifications to this engine? If so, then you need to find a qualified pro who knows how to read a spark plug and "jet" the engine accordingly.
... Do you live near North Alabama?.. I could help...
..If you are going to race this ATV, please find a good mechanic/tuner that can help...

MY BEST ADVICE - SUSPENSION TUNING will make her go faster than engine mods!!! (the faster it goes.. the better it MUST handle.. make it handle FIRST!!!
Contact any/all of these folks.. ask for their recommendations...(DO NOT overstate her abilities.. this will only hurt!!)
ATV
ATV Suspension Upgrades FOX
DeRisi Racing Inc

rubber side down to go fast!!...