We have a 2006 Goldwing GL1800 with a Monarch trike kit. Whether riding solo or with a passenger, the rear tires skid just going over small bumps and road imperfections. They definitely skid going over larger bumps and railroad crossings. You can even smell the burnt rubber. We normally ride with the suspension at 12 or 15. We've tried lowering the suspension to around 7 with no improvement. We've tried raising the suspension to over 20 with no improvement. I normally fill the rear tires to 25 psi. I've increased the tire pressure to 29 and no improvement. Has anyone experienced this skidding and what was your solution(s)?