I have 3 Eton four wheelers, any ways my youngest son has the 50 and has told me he wants his to go as fast as his brother 70 so I purchased the 70cc kit from anything ATV and I bought the 70 CC sprockets and figured it would be good. Well wrong. I need some help now. How can ,if I can , make this 50 as fast as the 70? And me kids just ride trails so I don't want to spend a ton. Its also a viper50 mini. So it has the smaller tires. People have told me to mod the clutch. I've wasted enough money so I'm turning to some people on here. O and I have contacted hetricks and they haven't been very helpful. So please if someone could help. Thanx