As Eric's motorbike crosses the ford in Kersey, the front panel of the sidecar gets ripped off by the impact of the water.
In the next scene the front panel is seen back on the sidecar.
Before the water crossing the left tank badge is visible on Eric's motorcycle, and after the crossing it's missing. The next time we see that side of the bike the badge is back, then it's missing again a few scenes later.