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Message: [QUOTE="tedkxkdx, post: 641086, member: 39245"] Since I have my own SX dirt track in the back yard I would like to comment. I find that only if you are worried about your tire slipping under acceleration you should seat jump but you gotta be sure your gonna make it and not case. ie better to roll it if unsure. I have tested the result of standing and sitting and when using the same throttle and accel to approach and go thru the ramp, the sitting position puts you up (3-5 more feet on a 40' double with a ramp angle of 25 degrees) due to the rebounding action. Also the less dampening you have on you suspension will cause you to go higher, i tested full in damp and half. BIG difference. I would not set jump anything over 15 mph. It is just too risky since as speed increases the throttle and body position increases as well. So when do u need to seat jump. Well I cannot start from a dead stop and stand 20 or 15 feet away from a 25 or 30 foot jump and make it. But seated I can. I would say that people first learning this technique should find a jump where they can launch but instead of it being a flat table top it is humped up. If you get it wrong than the distance to you and the ground are very reduced. Also once you do clear the say 20feet with gentle slope landing, you should try that standing and realise that you cannot get as high up in the air as seated and will land sooner. Roll up to the jump and work your way back. So roll in first and then power on at 5 feet from the ramp. once you have that than go back in 2 or 5 ft increments. The ramp should be 1.5 times the length of your bike as measured where the rubber meets terrafirma. Ramp angle should be between 10-20 degrees, remember 30 degrees is very steep and the most any dirt ramp should be in order to be safe. [/QUOTE]

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