Join Date: Oct 2011
Location: Lac La Biche Alberta Canada
If your bike is acting like the one in the video, I agree with Spec, It doesn't sound like a fuel problem to me. There is a reserve of fuel in the float bowl. This would need to be consumed before the engine would falter. The misfiring would be more random vs rpm and would not be immediate after firing the bike and revving up to 3500+ rpm.
I too would be searching for an electrical short or fault.
There have been issues with the fuel petcock partially failing though, where the valve wasn't opening fully while riding, causing fuel starvation. This would be more random vs RPM, not occurring at a specific RPM each time. It would occur more in time with engine load ie:not occur during light load and showing up during heavier loading such as climbing a slope.
As to inline fuel filters....I just found the factory inline fuel filter on my 2011. It is a tiny screen filter INSIDE the plastic inlet fitting on the carb. The part the fuel line connects onto. I was not aware it is there and only found it by accident when rerouting the fuel hose while installing a manual Yamaha Raptor petcock to replace the vacuum petcock.
Hope this helps!....justjeff
It's not a Tractor....It's a LOCOMOTIVE!! Chugga Chugga
Last edited by justjeff; 07-28-2013 at 10:44 AM.