Wont rev up - Polaris ATV Forum
Polaris ATV Forum
Go Back   Polaris ATV Forum > Polaris ATV Discussions > ATV New Members

ATV New Members If you are new here please post in this section so everyone can get to know you. This will be a kind of icebreaker section for new members.

LinkBack Thread Tools Display Modes
  #1 (permalink)  
Old 11-27-2012, 08:12 AM
rob_gouin's Avatar
Junior Member
Member #32246
Join Date: Nov 2012
Posts: 3
Thumbs up Wont rev up

Hello everyone, this is my first time posting. I have an 02 Polaris Sportsman 400 four stroke 4x4. It wouldnt rev up and was back firing through the air box. This is what I have done to bike. First I replaced the cam and exhaust rocker and adjusted valves to spec. While relpacing cam noticed broken wire for the coolant temp sensor so I replaced that also. The Bike fired right up and runs great but wont rev up past 1/4 throttle. It bogs out like its not getting fuel. So I drained fuel tank, replaced the fuel filter, cleaned the carb and air filter and also rebuilt the fuel pump and new spark plug. Still no change. Took the fuel line from tank and plumbed it directly into carb and held the tank up so it would gravity feed, bypassing the fuel pump and still no change. Starts and runs fine but wont rev up past 1/4 throttle. Seems to run a lil better with air box top off but not like it should. Did a compression check and has lots of compression. I then replaced the stator and cdi box and swapped coils with a different bike. and still no change. I have called every polaris dealer in the area and have gotten no help. I have bypassed the reverse override switch buy unplugging the sensors at the trany. still no change. battery is good and has good voltage. I cant for the life of me figure it out. PLEASE SOMEONE HELP ME!! I have cleaned the carb and adjusted the needle and air screw and no change. have been through carb 100 times and still wont rev up past 1/4 throttle. seems to run a lil better when its cold but still revs up slow and (doggy). I have tried everything i can think on and cant figure it out. Someone please help me. THANK YOU!
Reply With Quote
Sponsored Links
PolarisATVForums is the premier Polaris ATV Forum on the internet. Registered Users do not see these ads, So Register, It's Free!
  #2 (permalink)  
Old 11-27-2012, 04:20 PM
Bruce!'s Avatar
Polaris ATV Legend
Premium Member
Member #193
Join Date: Feb 2009
Location: Port Angeles WA
Posts: 20,004
Welcome to the board!
Reply With Quote

Lower Navigation
Go Back   Polaris ATV Forum > Polaris ATV Discussions > ATV New Members

Search tags for this page
2003 polaris 700 sportsman wont rev up
2003 polaris sportsman 700 twin wont rev up
2003 polaris sportsman 700 wont rev up
2007 polaris ranger replaced cam now wont rev
cant rev up polaris sportsman
cx500 rev slow
john deere 4 wheeler wont rev up
polaris 700 twin sportsman won't rev up
polaris sportsman 400 wont rev up

polaris sportsman wont rev up

ranger 800 wont rev up in gear
razor wont rev up
Click on a term to search our sites for related topics.

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

Similar Threads
Thread Thread Starter Forum Replies Last Post
2002 sportsman 400 wont start new stator. have spark wont fire roadjoker22 ATV Repair and Maintenance 13 11-03-2013 06:26 AM
My 500 wont run... Jcom Polaris Sportsman 14 06-11-2012 11:24 PM
It Just Wont Run RichB0106 ATV Repair and Maintenance 3 06-26-2011 07:37 AM
700 wont come out of awd refg3880 Polaris Sportsman 6 02-08-2011 06:54 PM
200? T-B 330 wont rev samt ATV Repair and Maintenance 3 12-08-2009 06:59 PM

All times are GMT -8. The time now is 07:53 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.