Tricking out the AC 120?

[Dahitman44]

Ok --

The boys are now 8 and they want a little more speed. Is it worth it to change some things on the 120 to get it to go a little faster. The neighbor's sled goes faster ... trouble, I know.

What are the pros and cons?

How do you do it?

They like to give each other rides while pulling the other behind on on a small sled -- will that work or will changes the speed reduce the power?

All replies are appreciated.

Hitman

[redtrucks]

Did you try putting a zip tie on the govenor spring? Just about doubles the speed. Have a 2000 Z120 and it's went through 2 boys and it's pretty much indestructible. The only issue that I've had with the sled is that I need to replace the drive chain every year. Kid's have out grown the sled so now it sits.

[Dahitman44]

That is a good idea. Any loss in power? how / where do I do that exactly? Is it safe?

The boys share a 2007 120.

[redtrucks]

If you go to a AC dealer and ask for a speed up kit for a Z120 they sell you a $5 zip tie in a bag. Just get a zip tie and find the govener spring for the carb, it's on top of the engine and out in the open. Put the zip tie through the spring and tighten. Does not hurt the engine, mine has been this way for several years.

[Dahitman44]

Ok -- so I am compressing the spring with the zip tie? is that it?

I am a little slow when it comes to stuff like that.

[redtrucks]

Yep, your compressing the spring. The tighter you compress the spring the faster it will go.

[Dahitman44]

So -- how much should I compress it? the boys are 8 -- i don;t want them to go too fast either -- just a little?

[redtrucks]

I compressed mine all of the way. I did this when my boys were around 5 or 6. It's not that fast.

[updecreek]

So -- how much should I compress it? the boys are 8 -- i don;t want them to go too fast either -- just a little?

Sounds like you need to keep it stock or put a pipe on re gear is and bore stroke the motor is kind of like a lawn mower?

[redtrucks]

just go a little at a time. I would at least compress the spring half way, if thats not fast enough go a little furture. If its too much cut it off and start over.

[Dahitman44]

Thanks for all of your help.

Hitman

[Dahitman44]

Just added the zip tie -- man was that easy, except for trying to get my fingers in there -- decided to have the wife help me.

Wow -- thanks for all of the help -- now we just have to wait for snow ...