A lean mixture, it seems to follow, is less likely to backfire, b/c there is less unburnt fuel heading out the exhaust. I know I hear a sputter now and then even though I have a completely stock exhaust on my Shadow. I also can tell by the smell that it's set to run rich. Back when I mowed lawns I ran my lawn mower toward rich when I was cutting tall thick grass and it would have this cool rhythm when not under a load. Yes, it backfired. No cool syncopated sounds when I readjusted the carb back to lean; no backfire either. You can do the same thing with a bike that's set rich, especially one with a deep stroke. The greater the depth of stroke the more distance the flamewall has to travel so the more likely you will have a backfire on deceleration. Air cooled engines run rich to prevent overheating and burnt valves. I always told my customers to drop their speed and put it in 3rd for the last few miles of a trip before stopping with their Beetle vans. This takes a load off the engine and allows it to cool down before stopping. This also extends the engine life, by preventing the very hot cylinders from warping from uneven cooling that invariably occurs when going from around 70 MPH in 4th for a long stretch to dead stop. This won't work with bikes, however, as they're not fan-cooled. That Honda's air cooled Nighthawk engines are so reliable and last so long is a tribute to Honda's genius. BTW, high compression combined with water injection results in about double the mileage and a performance boost without the danger involved in using nitrous oxide; and on an air cooled engine it runs cooler, as evidenced (in any engine ) by the lower temp of the exhaust gases at the port.
Sent via DroidX2 on Verizon Wireless™ -----Original message----- From: Allen Thomas <althomas...@gmail.com> To: Nightwawk Lovers <nighthawk_lovers@googlegroups.com> Sent: Fri, Jun 1, 2012 04:36:43 GMT+00:00 Subject: Re: [Nighthawk Lovers] Re: Yellow Nighthawk with modified exhaust If the mixture is right it won't backfire. Sent via BlackBerry by AT&T -----Original Message----- From: nighthawkin <gswannab...@gmail.com> Sender: nighthawk_lovers@googlegroups.com Date: Fri, 1 Jun 2012 00:31:18 To: <nighthawk_lovers@googlegroups.com> Reply-To: nighthawk_lovers@googlegroups.com Subject: Re: [Nighthawk Lovers] Re: Yellow Nighthawk with modified exhaust the backfiring is cause from running lean and it is normal. and not lean as in a bad way. you have to set it up to run rich if you dont want to hear it backfire on decel. most bikes do this but with the over muffled stock exhaust you never know it. take mufflers of any stock bike and just run the header pipe and lets hear what shes sounds like on decel??? -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lovers@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lovers@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en. -- You received this message because you are subscribed to the Google Groups "Nighthawk Motorcycle Lovers!" group. To post to this group, send email to nighthawk_lovers@googlegroups.com. To unsubscribe from this group, send email to nighthawk_lovers+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/nighthawk_lovers?hl=en.
