I've got a 1999 Yamaha DT230 road/trail 2 stroke that has developed a leak from the autolube pump area. It is a single cylinder that uses a separate oil tank and automatically pumps oil into the motor so you dont have to premix the fuel. I am using the recommended yamaha oil. Ive had the bike for about 3 months and have done about 2500 k's since I bought it at 9000k's. It hasnt missed a beat in the past and has seen a fair bit of dirt but is mainly used on the road. Just recently I have noticed small pools of 2 stroke oil under the bike when it is parked and it is coming from the drainage hole in the pump housing. When I remove the pump cover there is a bit of oil sitting in the casing, only about 15mls, but I can't see where it is coming from. I clean out the pump housing, start the bike, warm it up and watch the pump and can not see any leak. Took it for a ride, came home and still no oil in the casing. Left it overnight and the next morning the pools of oil were back. It has also fouled up the plug a few times recently, so badly that the bike wouldnt start. Ive had a few people look at it but no one can pinpoint the problem and Yamaha Australia do not have a service manual available for this bike. It has only started happening since the cold weather hit. Its been about 3-4 degrees the last few weeks at night and the bike is left outside under a carport. Any help would be greatly appreciated because im completely stumped now. Thanks. Patrick.