Polaris 120 mods

Polaris Racer 169 · Feb 7, 2011

I need to get some more speed for my boy. Did the bypass and just not enough. Should I do the big boy mods that are on that rec place website or just buy that Robin engine? They are about the same price so what's better?
Thanks
Dolan

Kraven · Feb 14, 2011

Polaris Racer 169 said:
I need to get some more speed for my boy. Did the bypass and just not enough. Should I do the big boy mods that are on that rec place website or just buy that Robin engine? They are about the same price so what's better?
Thanks
Dolan

Once you do the by-pass you'll want to install a smaller sprocket to increase the top speed.

REC MOTORS and Goodwin Performance, Zion Illinois sell them

brknrun · Feb 15, 2011

I just bought the economy perfermance kit from mid west min with clutch,hub sprocket and 35 chain Does anyone know if u need to remove links from the 35 chain to fit on the new sprocket

built4dtuff · Feb 15, 2011

brknrun said:
I just bought the economy perfermance kit from mid west min with clutch,hub sprocket and 35 chain Does anyone know if u need to remove links from the 35 chain to fit on the new sprocket

When I get my chains they are a standard length. You need to shorten it to.

built4dtuff · Feb 15, 2011

Polaris Racer 169 said:
I need to get some more speed for my boy. Did the bypass and just not enough. Should I do the big boy mods that are on that rec place website or just buy that Robin engine? They are about the same price so what's better?
Thanks
Dolan

Just the clutching will do wonders! I have never ran a pipe cuz they are not legal in my sons races. But I have tossed the idea of milling the head on his old One. Would up compression and with a good clutch set up I bet they would rip. Ive been told its only $50 or so for the head work.

Scott · Feb 15, 2011

built4dtuff · Feb 15, 2011

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

I figured out a fix for this but it over rides a safety feature on the sleds so pm me you haven't figured it out.

built4dtuff · Feb 15, 2011

Scott said:

Haha nice!!!! That's a hell of an engagement you have there Scott. I'm battling my sons stocker now trying to get a harder holeshot and still carry a good top end speed. We can only clutch and gear to be legal

Scott · Feb 15, 2011

Ohhhh it's legal alright....legal in my yard all day long.

I have no idea what's legal at the track and what's not.
BTW, what IS legal at the track and what's not? LOL

volcano buster · Sep 22, 2012

Updated photo to show where the blue wire attaches. It has been a while, but I think this is the "kill" wire from the handlebars. Simplest way I found to kill the engine with the remote setup.

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Polaris 120 mods

Polaris Racer 169

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Kraven

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brknrun

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Scott Stiegler

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