if you put both a bigger front and rear sprocket, you most likely didn't change the overall gearing.
a bigger front gives higher top speed, a bigger rear gives lower top speed.
what size gears did you put on it? how many teeth is the front and rear sprocket?
and upload your pictures on photobucket and copy and paste the
i didn't change any thing came like this all i get when it try to upload pic is upload error invalid file. helphttp://www.blasterforum.com/images/smilies/confused.gif