1997 Polaris Sport 400 - Carb Jetting

[Guest kjames]

Ok so i am new to this forum and of course like all forums I join its because I need advice! I have a 400l Sport that I rebuilt a couple years back and have not done anything else to it. Now we have not rode it much either but getting out this spring it is not running very smooth. Since it was bored 40 over should have rejetted the carb? (I think it needs more fuel but I could be wrong) I have not ever changed the reed valve and am going to just dont know if there are different sizes or stock will still work just might replace the ol thing. I have many questions I can get to later but I enjoy this forums thanks for all inqueries!

[wylde1]

Hi, I am a Polaris guy so I like your choice of quad. I don't know a whole bunch of how to fix them. I do my own work, but have to research the manual and previous posts on here all the time to help me through. I do learn a lot from reading about how others fix their problems so I will be watching to see what you end up doing to your quad to get it going.

[Guest kjames]

Hey same here I have learned a ton of info from sites like these

Edited May 18, 2012 by kjames

[myquadrepair]

If you have not run it for a while than I would clean the carburator to make sure it is not dirty.You could try and raise the needle valve one notch to see if there is a differance but tha is when you open te throttle.

[myquadrepair]

When I said raise the needle valve that means you would have lower the snap ring one notch on the top of the needle valve to raise the needle valve.

[Guest kjames]

going to try to get to it tomorrow and clean the carb and change the plug ect.. and will post results I am just thinking it needs rejetted which I have no experience in

Edited May 20, 2012 by kjames

[Guest kjames]

ok so she started right up out in the barn rode it up to the house and it was cutting out and running rough but was cold to. It died as I was pulling into position and wouldnt start back up ran the battery died. So I stuck it on the charger while I cleaned the carb replaced plug and installed new pull rope (didnt matter because the recoil spring is shot). Put everything back together and installed battery, nothing but a soleniod click. So I hooked up the charger and turned it to start (200 amp) just clicks. I tried everything I knew to do and then with the pull rope still shot I gave up for the day. But just to prove to me it was not the battery I stuck it in the kids quad and worked fine. The solenoid I just replaced about a month ago! but couldnt cross it either

[myquadrepair]

My quess is your battery is not putting out 12 volts or more. With a muiltimeter and switched on volts you can check your battery red probe on positive black probe negative Tun ignition switch on and check soleniod with red probe with black probe on negative post of battery, Go to post on starter with red probe and check. Make sure the starter button is pushed in when checking at starter.

[Guest kjames]

jumping the gun here but what is a good way to get to the starter behind the transmission belt housing I was trying to check that conection yesterday and couldnt get to I am going to go try now will give update, and wouldnt the test on the soleniod side give same results?

[Guest kjames]

battery reads 12.43, and power to starter reads 11.2 when hitting the start button accesorie or whatever it is the side stud on solenoid will read 9.2 when start button is pressed just clicks. I did not hook up the big battery charger and throw it to start and see what it reads then cause since it still clicks then I didnt figure there was a difference

Edited May 20, 2012 by kjames

[myquadrepair]

Sounds like the solenoid. Take the starter end of the cable off the solenoid and hold it on the battery side of the solenoid . Make sure you have a good connection and the starter should turn over.Check the ends of the starter and battery cables no frays or corrosition.