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2003 Yamaha YZ 250 F Questions & Answers
Yamaha settings
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!
2004 yzf bigbore over heats why???
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.
I have a 2002 yamaha yz250f. it started out not
Air to fuel ratio is important to starting and running your bike. A lean condition is when you have too much air for the fuel, this makes HEAT. A rich condition is too much fuel for the air, this FOULS plugs. An easy way to adjust this is to change the clip position on your main jet needle. THis is accessed from the top of the carb. It is mounted in the center of your slide. Try raising your needle position, by LOWERING the C-clip one notch.(lower the clip to raise the needle)(raise the clip to lower the needle) See if it runs better and cooler. if its better, but not perfect, try another notch lower, to raise the needle. Raise needle = richer Lower needle=leaner/hotter. Also check to be sure you have correct gap and heat range for your plug. 0.5-0.6mm gap
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