I have a huge flat spot on my 2003 XR70 after installing the Trail Bikes 88cc big bore kit. Does anyone have any suggestions on how to tune it, im not too good at it. Also I have a high volume oil pump but I have no idea where it is supposed to go!? I'm pretty sure the timing is right because it will run and go pretty fast but there is just a huge flat spot and at high speeds it doesnt run well at all. Any advice would be appreciated. Thanks.