Question about 2004 Yamaha YZ 450 F
I have just installed a new uprated stator coil on my yz 450 2004 to run lights on my bike as well as the spark plug. However it wont start now at all? I have spark and when i kick her over i do get smoke from the exhaust? every now and again she will back fire like a rifle shot going off. Ive checked all the connections and emptied the carb bowl and flushed the carb through. i keep getting a spark but does the spark need to be a certain strength? It seems normal and strong, and ive also put in a new spark plug? someone please help? Is it the timing or is there some kind of internal shut off for lack of oil or coolant, i just dont know,
regards chris penny
Hi and welcome to FixYa,
Offhand, the backfire is significant. It indicates that fuel is getting inside the combustion chamber and it further confirms that there is spark. Being the case, it would appear that this is now a timing issue. A couple of ideas to explore:
Posted on Dec 15, 2008
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:
Jul 07, 2014 | 2002 Yamaha YZ 426 F
Jan 18, 2014 | 2004 Yamaha YZ 450 F
Dec 04, 2011 | 2003 Yamaha YZ 250
Sep 30, 2011 | 2004 Yamaha YZ 450 F
Aug 13, 2011 | 2005 Yamaha yZ 250 F
Nov 07, 2010 | 2004 Yamaha YZ 450 F
Oct 23, 2009 | 2004 Yamaha YZ 450 F
Sep 03, 2009 | 2004 Yamaha YZ 450 F
Apr 29, 2009 | 2001 Yamaha YZ 426 F
Mar 29, 2013 | 2008 Yamaha TTR230
689 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: