they can be very fast. many companies make after market pipes for this model. of course jetting the carb after pipe is installed is important. you can experiment with the sprockets for more torque or more speed. front end can be replaced with yz 85 fork setup. makes for a quick, well handling mini thumper. in the right hands, will earn mad respect in the wild. not really much of a track bike for racing.
Around 45 to 50mph.
I got my all Stock 2007 ttr 125L to go up to 90 on the back lane
My 07 ttr 125l went about 55 , according to my GPS , stock.
a ttr 90 goes about 35 to 40mph.
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A TTR 125L is what I bought my daughter to learn to ride on. Very dependable and mild mannered, a good bike to learn on.
It will go about 20-30 MPH.
50-55
Like 70mph
no its good but you might want to consider a 250 if he knows how to ride I'm 14 gonna be 15 in two months and i own a 06 Yamaha banshee but for 2 wheelers its more dangerous but the ttr is good and fast enough for a 14 year old so no its not to small and not to big just perfect