Hi, new to forum and just bought a basket case '94 xcr 440 sp. Installed new pistons,rings,bearings,and other required parts. Primary looked good but has a white spring. Weights are unknown at this time. My issue is this, Starts hard(about 8-10pulls) idles erratic anywhere from 2500-3500, engages @ 5,000 and pulls hard once engagement is reached, then no bog. When you let back to idle it wants to die, feather the throttle and it idles erratic again @ about 2-3,000 rpm's. Any ideas????