I just built up a fixed gear bike with left side drive. I glued the pedals in so they wouldn't unravel and I'm getting this sharp grinding noise whenever I start riding from a stop and when I slow to a stop by resisting. It only happens at slow speed when I'm putting a lot of pressure on them. I'm pretty sure the noise is coming from the pedals. It happens every rotation on both sides. I'm not sure if this has to do with the left side drive though. Has anyone had something similar and know how to stop it?