me me me me me me me oops a burnt forest me me me me me meI completely understand why they are on the bikes, just wondering if it has ever been an issue for anyone. None of my bikes have had them left in place and I have not seen a spark come from an exhaust since the early '80's. On the other hand my head pipe will glow red and easily start a fire, so....
If the head pipe is glowing red hen you are way too lean and you need to richen the air fuel mixture. Lean can be caused by not enough back pressure or too much flow. Reinstall the spark arrestor and see if that helps.Ok, great. Thanks! Glad to see someone had the answer to the question I posed. :41:How about some ideas as to how to stop the head pipe from glowing red there tomatocity. And just to be clear, I have never been to ANY forest with the bikes. Just asking if it would be an issue. Not off-road but on-road through the parks.
If it was lean enough to glow the head pipe before you made the changes:Turned the screw out 3 turns and can smell the unburnt fuel yet the head pipe still glows red at the bend in the front. Floods very easy too. I have also done the .22 mod and drilled the air box. Could it be living between 5-7k rpm causing this? And if so what other options have I got to keep the head pipe from glowing?
Right, fresh air is introduced into the exhaust to reduce NOX emissions. Most single wall headers will glow in low light conditions even if the AFR is correct.'08s also have an air pump which can cause more of a lean condition.
Make sure every exhaust connection is tight.
After polling many sources I discovered this is common with many four cycle single cylinder motorcycles. This condition happens during idle or off throttle so there should be much concern about fires. Plus fires usually are started by a spark from the tailpipe.Just to add my 02 cents. Checked the valve clearance and changed the plug with oem on my 09. Test run in low light condition found header glowing after idling a few. Bike runs fine and the pipe cools once moving.
I find this disturbing as I ride in tall dry grass on occasion.
Robert your best bet is to contact EagleMike. Mike has good (proven) people that can do the work correctly and you can purchase everything you need through him.Tim, a bit off topic but I see you have a 685. at 10k my 09 is using a lot of oil. I am thinking 685 and wondering if you have some one in the area to do the bore.
Thanks, Robert. P.S I am in Tracy.