It's called "Covering Your Butt!" The manufacturers know that people are going to buy them for their kids despite the age recommendation - they just put the recommendations on there to keep from getting sued!

They know you are not going to buy your 12yr old a 90cc quad, so therefore their butts are covered!

 

The pulley spacer was removed before I took delivery. I thought about opening up the exhuast and fattening the jetting, but I'm not sure I want to mod it like that. Maybe a two-tooth smaller rear sprocket would do. It would lose a little bottom-end, but pick up some top speed.

Maybe I just need to get her a KLX110 or TTR90 dirt bike. of course, I'll need a WR or CRF to keep up with her

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I really think you can get a lot more performance out of it, so if the physical size of the bike works for your daughter, try getting bigger tires (and then wheel spacers to compensate for the higher center of gravity), and also check out what you can do with the CDI.

My 9 year-old has a 2006 Arctic Cat DVX50, and we removed the pulley spacer and switched from 16" to 19" tires, and I am told I can also remove a wire to the CDI that electronically (?) restricts the throttle and thus limits top end (it goes about 19 mph. now), so I will pursue that avenue as well.

I would not be surpised if you daughter's bike and my daughter's bike share a lot of components made by Kymco, meaning you could likely modify the CDI as well.

Hope this helps!

 

Caution has to be foremost - my kids had to be able to ride a bicycle before I put them on a motorized machine.

They started off on power wheels in the yard and rode with me or someone else. Full on safety gear head to toe, and adult supervision ALWAYS - no letting the quad be the babysitter.

Size is important too. My older son was on a 90cc dirtbike at 9 but like quads better. I got him a 90cc quad when he was almost 11 and he rode it til he was 13 (5'6" and 140 lbs) before going to a blaster.

The little one got to ride the 90 (by then with a pipe and a big bore kit) in open flat spots when he was about 5 and then solo when he was 7. I wasn't happy with the way he rode it, so I bit the bullet and put him on a stock LT80. He still is fine with it, right size, right amount of power.

Its sad that the guidelines can't just be guidelines - all children are different and parents SHOULD know best and accept RESPONSIBILITY for their decisions, but......... some don't and that leads us to more laws (sigh)

If your daughter is anywhere the size of my littler guy (he's big) then an LT80 or a dirtbike is probably a better fit.

 

Dal,
I think you are goin the wrong way.
Your first post was its way under powered,if you go with a 2 tooth smaller rear sprocket,it'll have even less bottom end but more top end.
And bigger tires would compound the problem.
Smaller front,bigger back is what to do to get more bottom end if you go that route.
I dont know much about the mods,cuz I dont know much about motors.
But my manual says something about taking an air limiter out for more power,but mine didnt come with it.
More air,more power.Of course you would have to adjust the air/fuel mixture for max performance.
Someone correct me if I'm wrong.