Here is the prob. When I shift into second or third gear like casual driving everything is just fine, but when I get on it and want to shift faster not really hard still using the clutch here just shifting faster I get a really nasty grinding noise like I let off the clutch to fast. My dad thinks it could be the syncronizers. I dont know what gears are in it cuz I suspect new gears were added since my RPMS go up real fast and my top end is lower..... Any ideas guys??