If the spark plug on a 250 2-stroke is not tightened down enough, can u loose compression and get spooge on an otherwise perfectly jetted bike? I was not even turning it down enough to crush the washer on the the plug. One time I even had a little bit of pre-mix coming out around the plug. I just had a compression test and it was 175 lbs. This bike has good jetting but always has had a little spooge on the exhaust. If I put around the track in first gear at a quarter throttle with the kids the pipe is dry. I seriously doubt it is the main causing the spooge considering I was down to a 148. This bike is a 2004 kx 250 bought brand new in feb. I always heard low compression will always mimc rich jetting.