Question about 2003 Yamaha YZ 250
I have a two stroke atv 200 blaster i bought it with many aftermarket parts but it had very little power from idle to mid rpm. after trying many things i noticed it had a spacer between the carb and the reed valve. I took it off and gained alot of power back but still not perfect. It still had a stumble from idle to low rpm before it caught itself and then it ran good. I rejetted the carb from 230 stock to 340 and that helped the performance but still had slight hesitation. I also tried lower and upper the needle in the carb it just made it worse or no change. I then tried a stock reed valve and it got it real close to perfect but you still have to rev the motor a little to get the take off power then it runs great does anybody have solution please respond thanks
Try placing the reed spacer between .reed assembly & cylinder, also try an adjustable ignition stator plate, set at +4, k & n air filter, open air box.replace T.O.R.S. eliminator system w/ a cap & cable, and idle air screw install kit, also a pipe tuned for more torque(bottom -end/mid range) blasters dont have a lot of power on bottom end and the engine needs to rev to hit power band.cylinder porting,240 bigbore kits, & +4mm stroker crank assemblies are good performance options.
Posted on Feb 23, 2009
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Apr 09, 2016 | Yamaha Motorcycles
Mar 21, 2016 | Motorcycles
Jan 05, 2016 | Factory Motorcycles
May 15, 2011 | 2006 Yamaha Warrior
Apr 30, 2011 | 2005 Yamaha YZF-R1
Jun 06, 2009 | 2003 Yamaha YZ 250
Mar 01, 2009 | 2004 Yamaha YZ 125
625 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: