Hey all, I bought my son a eton viper 90r. He is expressing an intrest in racing and want him to. what should I do to this thing to help it out first. I know the possibilities are probably endless, but i wanna start slow incase he decides he doesnt like it.

Plus we bought it used but in good condition. only a year old. On the muffler though a screw is missing underneath and all the exhaust is coming out of it instead of the spark arrestor. Is this normal or beneficial? Thanks for any help.