Question about 2002 Yamaha YZ 426 F
Check your bore for scores/marks wear also the piston,,if they both look good get some new rings,,also check your valve stem seals as they also cause heavy smoke when worn out,,check if your valves are leaking by pouring fuel in the intake port and exhaust port,one at a time and see if any fuel leaks from the valve faces.
Posted on Mar 20, 2011
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this 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.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Jun 21, 2014 | Yamaha YZ 426 F Motorcycles
Apr 25, 2014 | 2002 Yamaha YZ 426 F
Sep 05, 2013 | 2002 Yamaha YZ 426 F
Sep 09, 2012 | 2001 Yamaha YZ 426 F
Jun 26, 2012 | 2001 Yamaha YZ 426 F
Feb 17, 2011 | 2002 Yamaha YZ 426 F
Nov 19, 2010 | 2001 Yamaha YZ 426 F
Jun 26, 2010 | 2002 Yamaha YZ 426 F
Jun 08, 2009 | 2001 Yamaha YZ 426 F
202 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: