Polaris 120 mods

PJ-Hunter · Sep 17, 2010

A while back I was speaking with a fellow regarding the gov. bypass that he did on his daughter's 120. He emailed me some photos and I thought that I backed them up to my hard drive. It seems that I did not. And now that I switched to Windows 7 (*roll eyes*) I lost all of my emails due to the fact that 7 does not have an email client. I am hoping that I may find him again and get the pics sent back to me. I'm getting ready to do the work on the 120 and I need the pics or instructions on this.

Help please.

CO_MapMaker · Sep 27, 2010

been researching 120's all weekend and it seems like the Rec. Motors "Power Intake" kit might be the way to go.

It comes with the gov. spring, an adjustable main jet and velocity stack. The polaris kit is little more than the cat though?

http://www.recmotor.com/products/polaris-xcr-120-power-intake-performance-upgrade-kit/

dragon12 · Oct 13, 2010

If I remember right, the bypass is a straightened paperclip, a zip tie, or a spring. Can't really rember right now but it is really simple. Go to denniskirk.com and look up the part and then look up the installation instructions on that page. A little late but maybe this helps.

Kraven · Oct 18, 2010

DISCOUNT GOVERNOR BYPASS

dragon12 said:
If I remember right, the bypass is a straightened paperclip, a zip tie, or a spring. Can't really rember right now but it is really simple. Go to denniskirk.com and look up the part and then look up the installation instructions on that page. A little late but maybe this helps.

DISCOUNT GOVERNOR BYPASS, PIC POSTED, ONLY 1 SMALL WIRE TIE (RED IN PICTURE) required, you just need to keep the spring collapsed, and prevent it from stretching out.No pins, links, clips required.

One nice feature about this method is that if you have kids of different ages riding the same sled, you can easily 'slow the sled down" just by simply taking a pair of side cutters and cutting the tie.

strokkerman · Nov 25, 2010

i did this mod to my 4 year olds 120 and it works great. the only problem i am having is at idle the sled is "hunting". i have tried adjusting the gov but cant seem to get it. is this normal when you install the ty wrap?:face-icon-small-win:face-icon-small-sho

Kraven · Nov 30, 2010

SURGING @ IDLE

strokkerman said:
i did this mod to my 4 year olds 120 and it works great. the only problem i am having is at idle the sled is "hunting". i have tried adjusting the gov but cant seem to get it. is this normal when you install the ty wrap?:face-icon-small-win:face-icon-small-sho

Just reduce the idle speed a little bit, that will solve the issue.

POLZIN · Jan 7, 2011

I just installed a recrational motors sports "robin engine " with the stage 1 kit and Mountain head cut . Wow! what a difference! I need better clutching and gearing now. Their power intake kit would be a great adddition to any stock sled .

coyoteman · Jan 11, 2011

The zip tie works great. My daughter was riding in our fresh yesterday and even opened up she was wanting to go faster. Music to my ears. :face-icon-small-hap

greeneman · Jan 11, 2011

Just watch out, there is a plastic gear inside the engine that will only handle higher rpms for so long. If it comes apart there will be plastic all through the engine.

M.M. 700 · Jan 11, 2011

greeneman said:
Just watch out, there is a plastic gear inside the engine that will only handle higher rpms for so long. If it comes apart there will be plastic all through the engine.

I have heard about that happening. I think Rec Motorsports offers a different gear to handle it.

How much faster does it run with the gov-bypass???

Kraven · Jan 12, 2011

M.M. 700 said:
I have heard about that happening. I think Rec Motorsports offers a different gear to handle it.

How much faster does it run with the gov-bypass???

Just remove the gear if you're worried about it, you don't need to buy a "different gear"

The speed improvement with the governor by-pass was DEFINITELY noticeable, hard to put a # on it.

greeneman · Jan 14, 2011

I just removed gear, but as said if more than one kid rides the sled so you need to have the governor working, the rec motor sports heavy gear is the way to go. With no governor I show a 6 mph increase on top with stock gearing. But it could be geared a little higher to get more.

Kraven · Jan 14, 2011

greeneman said:
I just removed gear, but as said if more than one kid rides the sled so you need to have the governor working, the rec motor sports heavy gear is the way to go. With no governor I show a 6 mph increase on top with stock gearing. But it could be geared a little higher to get more.

You can easily control the top speed with an adjustable throttle stop instead, similar to the idle speed screw except install it on the opposite end

WIMPY · Jan 18, 2011

How about if a guy is looking for a re-build kit for the stock card. Mine wont run unless its about full choked

POLZIN · Jan 21, 2011

WIMPY said:
How about if a guy is looking for a re-build kit for the stock card. Mine wont run unless its about full choked

www.recmotor.com They have everything youll need. from a rebuild kit to a race engine .

Spaarky · Jan 21, 2011

is there a way to slow them down a bit? My daughter is just short of 3 years old.. and rides it like it is a WSA final. I tried a block behind the throttle, but once the clutch engaged, it seemed like it was just as quick.

grumpyoldbastard · Jan 21, 2011

I just did this for my daughter who is also just under three. First make sure the governor spring is in the first hole. Second there is a throttle block screw that you can screw in towards the stop so that it hits sooner( this keeps the throttle from being squeezed all the way). Hope this helps. If you have questions just ask.

Spaarky · Jan 21, 2011

I will try that, I put a block behind the throttle which I thought would do the same thing. Once the clutch engaged... it would just take off just as fast. I was looking for something fairly slow. At this point I almost have to run next to her.

volcano buster · Jan 22, 2011

Remote Kill Switch! :face-icon-small-win

snowman*150* · Jan 22, 2011

volcano buster said:
Remote Kill Switch! :face-icon-small-win

haha now that is awesome!:face-icon-small-hap

Polaris 120 mods

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