Governor bypass...Yes or no????? - HCS Snowmobile Forums

Reply
 
LinkBack Thread Tools
Old 11-15-2010, 01:25 PM   #1 (permalink)
Member
 
Join Date: Nov 2009
Posts: 22
Default Governor bypass...Yes or no?????

Looking for real world experience with this mod for the 120 minis. Want to make my sons 120 Assault faster for him this winter but don't want to grenade the engine in the process. Tried searching but still not sure. Any input appreciated. Also, how hard to take out the plastic govenor gear. Does the engine have to come out?

Thanks

ken
NF600SHIFT is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 11-17-2010, 09:52 AM   #2 (permalink)
Advanced Member
 
tntfaguy's Avatar
 
Join Date: Jan 2009
Posts: 81
Location: IN
Default

Ken, I can only speak to experience with the Arctic Cat 120, but yes it makes a big difference and yes you have to take the motor out. Fairly easy to do though. For some reason I don't really hear of people taking them out of the Polaris or Ski-Doo mini's only the Cat's....not sure if there's a reason....
tntfaguy is offline   Reply With Quote
Old 11-26-2010, 12:41 PM   #3 (permalink)
Super Advanced Member
 
OutKast's Avatar
 
Join Date: Nov 2004
Posts: 5,496
Current Sled(s): 2015 Indy 800, 08 D6,2010 Mod120,'93 Indy 340
Age: 39
Default

On my Son's Polaris 2010 120 it is just a $7.00 spring. And no the engine does not have to come out. It would do 9mph before the mod and now does 15. I rode beside him before and after and verified this. It is a noticable difference but not extreme. I will be looking to get more speed for him after a few more rides and will be changing the Gear and Hub. I believe, but could be wrong, that this will get the little bugger to 28 mph.
His Mommy wont like this haaa
__________________
2006 AMCRA Amateur Rookie of The Year
2007 AMCRA Amateur Open Sportbike Champion
OutKast is offline   Reply With Quote
Old 11-26-2010, 01:26 PM   #4 (permalink)
Super Advanced Member
 
SayByeBye's Avatar
 
Join Date: Dec 2008
Posts: 856
Current Sled(s): CFR 1K, 07F6, Z120/200 mod
Previous Sled(s): Hijacked Z1 Turbo
Location: Ontario
Favorite Riding Area: On Snow
Age: 33
Riding Since: 3
Default

If you change the spring or zip tie it you will override the governer. The problem is that with the increased rpms the plastic governer gear can come apart sending parts through your engine, destroying it.

To remove this the engine needs to come out and the governer assembly needs to be removed. Arctic cat and ski doo for sure.. and I think polaris too.

I ran mine for a season with the spring zip tied without a failure then removed it season two. Its an easy job but time consuming. when you see how its made youll be glad its out.

Now the 120 is out and a 200 is in its place (pulled the governer out of it too) Should have the install finished tonight.
SayByeBye is offline   Reply With Quote
Old 11-27-2010, 08:08 PM   #5 (permalink)
Member
 
Join Date: Dec 2008
Posts: 17
Current Sled(s): 2009 Switchback 600
Default

It sure seems like they made it needlessly complex. A simple throttle stop would have acclomplished the same thing, right?

What exactly does the gear do?

I went to do the bypass thing with the plastic tie on the zr120, but it appears that when the throttle is pinned to the handlebar, the carb is wide open. In other words, it doesn't look like wiring the gov spring will do anything. Am I missing something?
mt99 is offline   Reply With Quote
Old 11-30-2010, 03:38 PM   #6 (permalink)
Super Advanced Member
 
SayByeBye's Avatar
 
Join Date: Dec 2008
Posts: 856
Current Sled(s): CFR 1K, 07F6, Z120/200 mod
Previous Sled(s): Hijacked Z1 Turbo
Location: Ontario
Favorite Riding Area: On Snow
Age: 33
Riding Since: 3
Default

A throttle stop wouldn't give you the same low end or hill climbing/deep snow power; when you apply the throttle the carb will fully open allowing more air and fuel for more power to get you going, once the engine reaches 3600 +/- rpm the weights in the gov expand closing the throttle allowing only enough flow to rev 3600 rpm. when climbing a hill the load will bog the motor so when the rpms drop the gov releases tension and you get more throttle.

A throttle stop limits throttle position but not revs ie: if limited to half throttle you wouldn't have the power to climb a hill, but going down the hill you'd over-rev.
SayByeBye is offline   Reply With Quote
Old 11-30-2010, 08:03 PM   #7 (permalink)
Member
 
Join Date: Dec 2008
Posts: 17
Current Sled(s): 2009 Switchback 600
Default

Thanks for the explanation. So can I infer from your explanation that wiring the spring will increase the top speed even though it doesn't change the position of the throttle blade in the carb?
mt99 is offline   Reply With Quote
Old 12-03-2010, 11:01 AM   #8 (permalink)
Super Advanced Member
 
SayByeBye's Avatar
 
Join Date: Dec 2008
Posts: 856
Current Sled(s): CFR 1K, 07F6, Z120/200 mod
Previous Sled(s): Hijacked Z1 Turbo
Location: Ontario
Favorite Riding Area: On Snow
Age: 33
Riding Since: 3
Default

Right. even with the spring tied the throttle still has full movement but with little or no interference from the governor.

Tying the spring will limit the governor's interference. You can start by installing the zip tie loose and gradually tightening it until you have the speed your after. Chances are you'll have it tight in no time getting max revs.... that's when the plastic gear is at risk of coming apart.
SayByeBye is offline   Reply With Quote
Old 12-04-2010, 03:07 AM   #9 (permalink)
Super Advanced Member
 
kraven's Avatar
 
Join Date: Feb 2008
Posts: 1,949
Current Sled(s): 2007 DRAGON 700, 4500 MILES
Previous Sled(s): 2002 EDGE-X 800,6400 miles, 1999 XCR 800
Location: MIDWEST
Favorite Riding Area: YELLOWSTONE
10-11 Mileage: 520 so far
Age: 49
Riding Since: 1985
Cool Polaris 120 governor by-pass

Quote:
Originally Posted by NF600SHIFT View Post
Looking for real world experience with this mod for the 120 minis. Want to make my sons 120 Assault faster for him this winter but don't want to grenade the engine in the process. Tried searching but still not sure. Any input appreciated. Also, how hard to take out the plastic govenor gear. Does the engine have to come out?

Thanks

ken
On a 2008 POLARIS 120, note the RED mini-tie holding the spring in the "collapsed" position, been runnin' it for (2) seasons like this.

In a perfect world, the plastic governor gear should be removed, engine removal is req'd
Attached Images
File Type: jpg 120 GOVERNOR SPRING.jpg (175.5 KB, 149 views)
__________________




Byron Circa 1984, '72 Dodge Colt, Full Tube Chassis, Strange Struts, 4 Link, Koni Coil Overs, 15" x 33", Mild 426 Wedge, Torqueflite, Lexan windows, Dzus Fasteners & Quick Release Pins Everywhere, All Polished Aluminum Interior, Fuel Cell, "Weld" Superlite Wheels, 2220 lbs. w/Driver, Leaving the Starting Line Carrying the Front Wheels and Being Plastered into the Back of the Seat and Stopping it from 137+ m.p.h. by Pulling the Parachute-PRICELESS!!!



Byron, 1982, 71 Dodge Demon, 426 Wedge, Aluminum 4-speed, Narrowed Dana 4.56, Alston Bars & Floater, SS Springs, 12.20" x 31.25" Firestones, Polished Centerlines, 10 pt Rollcage, Aluminum wheel tubs, Fiberglass fenders, hood, & decklid


1986 INDY 600 LIMITED EDITION CHROME PACKAGE [/b]91 M.P.H. @ RADAR RUNS 1000' (6000+ MILES) TRAILERED TO YELLOWSTONE IN 1988

Last edited by kraven; 12-04-2010 at 03:11 AM.
kraven is offline   Reply With Quote
Old 12-14-2010, 12:37 PM   #10 (permalink)
Member
 
Join Date: Jul 2009
Posts: 13
Location: prattsburgh, ny
Default

If the plastic gear is removed will the motor over rev. Or how do you keep it from over reving
WERESTHESNOW 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 01:04 AM.



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