The trans oil (JASCO) is turning black after a few rides. The air filter is clean. Thus, I was thinking maybe it is the clutch plates that is causing this to occur. The bike is a 1996 Suzuki RMX250 with low mileage and with the OEM clutch parts. The clutch works when shifting the bike into gear either stoped or moving. However, if the engine signs off going down a hill, pulling in the clutch will not get the rear wheel rolling. I appreciated your responses that will help me with this concern. Thanks