Ive heard all this ranting and raving about 4-strokes compression braking, and i tried it on my cr125, downshifting and poppin the clutch. Sorry, very little effect, i guess your need more PSI of compression, as in a 4 stroke or 250/500? I watched the 4 strokes use engine braking, followed by a bwaaapp, and a bucket full of sand hitting me. Ouch!, and I was wearing a chest protector:( . But using the disc brakes by themselves lets me concentrate more on getting th feel for them and brake on the threshold of traction rather then lock them up and use compression braking which would be worthless in that situation.