Got the 10 yr old the TTR 90 today and

[budvol]

He loves it!!!!!!!!!!!!!!!!!!! I looked at um all KLX 110 CRF 70 and 80.

Picked the Yamaha because of the ELEC start. The KLX was a close second but lost out over the elec start. They should add it to that bike. Because I wiould have got it if it had it!

But the TTR90 starts right up with an EASY push of the button and hes gone!

I am 6 foot 2, 205 and it hauls me fine also.

 

[HajiWasAPunk]

Awesome!
My 10 year old started on a CRF80. I don't think you could go wrong with any of the bikes you mentioned.
Did you notice the ttr90 being a lot smaller than the CRF?

 

[budvol]

Yes it is smaller.. but it fits him good. I think the CRF 80 would have been a little to big.