Max weight for a Typhoon 125?

[FUTheman]

I'm thinking of getting my 9yo sona TY 125 and I want to get an idea of how long he'll be able to ride it with mods. I see some of the kids are in the 100 to 110 lb range. I take it these kids ride on gussetted frames. With proper frame upgrades, how much weight do you think it can take on an MX track?

[azextreme]

My kids 8 and jumps his pretty good. No problems yet w/ no frame mods but it does have elka's on it!