[pitrider923]

my friend has a ttr90 and i wanna help him get the most power out of it WITHOUT spending any money or very little like 20 bucks. i am very good at working on bikes and i have every tool imaginable so im willing to do anything

 

[alexficco]

port the head

 

[alexficco]

lighten the fly wheel

 

[USERNAME]

Ported intake manifold, and head.

Lighten flywheel

Bored stock carb and rejet for either a clamp on filter or airbox vents on the stock airbox

Stiffer clutch springs

Gutted stock pipe if running a stocker

Get rid of the stock kid safety stuff and take off all brackets for that stuff.

Lighten and true the crank