20 Most Recent 2003 Yamaha YZ 250 F Questions & Answers

You have a loose connection to the ignition system . When cranking make sure it is in neutral. and kill switch is in run position. The only thing dropping would sensibly affect is the fuel system or jarring a switch., but with the suspension you have there really is no jarring. So, I would ck the wiring. something is loose.

try turning the idle up and when you do it give it a little bit of gas

there is a car at the top of the fork which it has a spring and the oil should be drained out from the bottom of the fork little screw look in owners book make sure you only add the right cc of oil and should always do both must use yamaha fork oil or comp oil only

bottom of forks turn all the way in, then back out 12 clicks top of fork - trail riding = all the way out then turn in 2 clicks, track riding = turn in 8 clicks Rear spring needs to be adjusted so the tip of the rear fender drops 2.75" when sitting on it. The top adjustment (compression valve) will be close to all the way out for trail and 5 to 8 clicks turned in for track. The bottom adjustment meters how slow or fast the shock extends (rebound). Stand on something at peg height with one foot on the peg and the other on your stand and shove the bike down. Adjust the bottom (rebound) clicker to match the front of the bike so that both return to top at the same time. This is a good starting point for any bike. To fine tune your suspension it is always best to have a suspension tech watch you ride and make adjustments until the chassis of the bike stays flat while the suspension does its work. Usually take a tech 20 minutes to set the front and rear compression and rebound track-side!

Oil it water level, or if it has a water pump, it might not be working, or there is some buildup or a hole in your radiator hose. Tons of reasons. Check and see if your oil is milky. Could be a piston ring issue. Gaskets leaking in your manifold. Too many reasons but those are some to start with.