Polaris idles rough - HCS Snowmobile Forums

Reply
 
LinkBack Thread Tools
Old 12-18-2011, 05:14 PM   #1 (permalink)
ACE
Super Advanced Member
 
ACE's Avatar
 
Join Date: Aug 2003
Posts: 2,201
Current Sled(s): fst turbo, 550 shift
Previous Sled(s): srx, mxz, sx, mach z etc
Location: martintown
Favorite Riding Area: Northern Quebec
10-11 Mileage: 1500
Age: 37
Riding Since: 1976
Default Polaris idles rough

I have a 07 120 that i just removed the plastic governor, installed rec motors valve springs and their adjustable main jet. I set the valves at 4 thou and it now idles like crap and is popping through the carb. As soon as i touch the throttle it cleans right up. Should the rod and spring that run from the governor rod to the carb butterfly be keeping the butterfly tab againts the idle screw at idle? I am lost now and snow is around the corner. Any tips would be great.
ACE is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 12-19-2011, 08:16 AM   #2 (permalink)
ACE
Super Advanced Member
 
ACE's Avatar
 
Join Date: Aug 2003
Posts: 2,201
Current Sled(s): fst turbo, 550 shift
Previous Sled(s): srx, mxz, sx, mach z etc
Location: martintown
Favorite Riding Area: Northern Quebec
10-11 Mileage: 1500
Age: 37
Riding Since: 1976
Default

can someone tell me what this clip with round puck shaped metal thing is.
Attached Images
File Type: jpg 120%20GOVERNOR%20SPRING.jpg (118.0 KB, 27 views)
ACE is offline   Reply With Quote
Old 12-19-2011, 10:47 AM   #3 (permalink)
Member
 
Join Date: Dec 2011
Posts: 23
Default

I am not 100% on which part you are asking about so I will start with

1) throttle cable adjustment-Screw with the cable running through
2) full throttle stop-Stop screw so you dont stress the cable

your idle issue may just need a 1/4 turn on the gov screw. That is what I did.

The backfire sounds like something else. Did you clean the carb when you installed the adjustable main? Could have some crap in the carb.
taphee is offline   Reply With Quote
Old 12-19-2011, 11:52 AM   #4 (permalink)
ACE
Super Advanced Member
 
ACE's Avatar
 
Join Date: Aug 2003
Posts: 2,201
Current Sled(s): fst turbo, 550 shift
Previous Sled(s): srx, mxz, sx, mach z etc
Location: martintown
Favorite Riding Area: Northern Quebec
10-11 Mileage: 1500
Age: 37
Riding Since: 1976
Default

on the throttle stop screw is a metal tab that went around the jam nut for the stop screw and has a round metal thing that you see face up in the picture. I rremoved this and adjusted the throttle stop screw back to allow for full throttle as it was in way to far. Is this just a tamper proof thing to keep guys like me from adjusting it?
ACE is offline   Reply With Quote
Old 12-19-2011, 11:55 AM   #5 (permalink)
ACE
Super Advanced Member
 
ACE's Avatar
 
Join Date: Aug 2003
Posts: 2,201
Current Sled(s): fst turbo, 550 shift
Previous Sled(s): srx, mxz, sx, mach z etc
Location: martintown
Favorite Riding Area: Northern Quebec
10-11 Mileage: 1500
Age: 37
Riding Since: 1976
Default

this thing here
Attached Images
File Type: jpg 120%20GOVERNOR%20SPRING.jpg (119.2 KB, 25 views)
ACE is offline   Reply With Quote
Old 12-19-2011, 12:17 PM   #6 (permalink)
Member
 
Join Date: Dec 2011
Posts: 23
Default

I looked it up on the micro fich and it says its just a speed control. Shouldnt really cause a back fire but I would tach it to make sure you are not running way over on RPM's. Did you mess with the carb at all? Other then the main jet kit? Did you clean it?

BTW, the micro fich is a Polaris parts ref that can be found on most dealers website. just a FYI thats all.
taphee is offline   Reply With Quote
Old 12-19-2011, 02:07 PM   #7 (permalink)
Super Advanced Member
 
mttm's Avatar
 
Join Date: Nov 2011
Posts: 121
Default

The Polaris has a rev limiter for idle, if the mechanical idle is set way too high it will bump the rev limiter causing the motor to miss and sometimes pop a little through the carb. Try adjusting the the idle screw or cable to go below the limiters cut out rpm and it will probably smooth out for you.
mttm is offline   Reply With Quote
Old 12-19-2011, 02:36 PM   #8 (permalink)
ACE
Super Advanced Member
 
ACE's Avatar
 
Join Date: Aug 2003
Posts: 2,201
Current Sled(s): fst turbo, 550 shift
Previous Sled(s): srx, mxz, sx, mach z etc
Location: martintown
Favorite Riding Area: Northern Quebec
10-11 Mileage: 1500
Age: 37
Riding Since: 1976
Default

Quote:
Originally Posted by mttm View Post
The Polaris has a rev limiter for idle, if the mechanical idle is set way too high it will bump the rev limiter causing the motor to miss and sometimes pop a little through the carb. Try adjusting the the idle screw or cable to go below the limiters cut out rpm and it will probably smooth out for you.
Thats exactly whats happening, i thought maybe it was something along those lines as its acting like a throttle over ride failure. Thanks
ACE is offline   Reply With Quote
Old 12-19-2011, 03:58 PM   #9 (permalink)
Newbie
 
Join Date: Dec 2010
Posts: 8
Default

The tab you are talking about is just like you described as tamper proof tab. I removed mine to adjust throttle stop when my daughter was just starting out.
DukDog is offline   Reply With Quote
Old 12-19-2011, 06:58 PM   #10 (permalink)
ACE
Super Advanced Member
 
ACE's Avatar
 
Join Date: Aug 2003
Posts: 2,201
Current Sled(s): fst turbo, 550 shift
Previous Sled(s): srx, mxz, sx, mach z etc
Location: martintown
Favorite Riding Area: Northern Quebec
10-11 Mileage: 1500
Age: 37
Riding Since: 1976
Default

got er she runs like a top. thanks lads
ACE is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

Thread Tools

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



All times are GMT -4. The time now is 09:43 AM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Friendly URLs by vBSEO 3.6.0