99bansheeboy Posted October 11, 2009 Report Share Posted October 11, 2009 ok so i took it for a spin today...and its about 6 degrees Celcius....and so to counteract it being so col i richened up the fuel.... anyways i was taking it for a spin and then it back fired (i dont know but it made a noise), do you think that was detonation ? the fuel is like 87 octane and i know thats waaayy to low i should be running 93...so was it just a bit of detonation ? Quote Link to comment Share on other sites More sharing options...
quikshee Posted October 11, 2009 Report Share Posted October 11, 2009 Why in the world would you put 87 octane in your bike?? You need 91-93. More than likely it's detonating like a sombitch, I don't know if that would cause backfiring tho. Why did you richen up the fuel? The jetting needs to be changed for the weather, not the gas/oil ratio. Quote Link to comment Share on other sites More sharing options...
spurdy Posted October 11, 2009 Report Share Posted October 11, 2009 Why in the world would you put 87 octane in your bike?? You need 91-93. More than likely it's detonating like a sombitch, I don't know if that would cause backfiring tho. Why did you richen up the fuel? The jetting needs to be changed for the weather, not the gas/oil ratio. X2 Quote Link to comment Share on other sites More sharing options...
99bansheeboy Posted October 11, 2009 Author Report Share Posted October 11, 2009 lol i richened the fuel becuase you run leaner in the cold...+ i dont have anyother jets ... Quote Link to comment Share on other sites More sharing options...
spurdy Posted October 11, 2009 Report Share Posted October 11, 2009 lol i richened the fuel becuase you run leaner in the cold...+ i dont have anyother jets ... You run more fuel to air in the cold. Not more oil to fuel. Quote Link to comment Share on other sites More sharing options...
quikshee Posted October 11, 2009 Report Share Posted October 11, 2009 lol i richened the fuel becuase you run leaner in the cold...+ i dont have anyother jets ... The reason you run leaner in the cold is because the the air is thicker than warm, thus causing more air intake and the same amount of fuel resulting in your lean condition. More oil in your gas will not fix that, you will just have smokey exhaust. You need bigger jets to counter the larger amount of air coming through the carbs. It sounds like this is part of your problem along with your fuel octane. The lean condition will cause backfiring. Buy bigger jets and drain that poo 87 octane out of your bike, before you start having bigger problems. Quote Link to comment Share on other sites More sharing options...
98_shee Posted October 11, 2009 Report Share Posted October 11, 2009 Backfiring nomrally means an air leak, check your intake boots for cracks. Quote Link to comment Share on other sites More sharing options...
99bansheeboy Posted October 11, 2009 Author Report Share Posted October 11, 2009 Backfiring nomrally means an air leak, check your intake boots for cracks. nahh i think its detonation.....just i never had detonation b4 and im kinda new to this Quote Link to comment Share on other sites More sharing options...
jbooker82 Posted October 11, 2009 Report Share Posted October 11, 2009 It is not detonation. Detonation is a rattling sound. It sounds like marbles or ball bearings rattling around in the top end. The back fire is from it being lean. A back fire can trash a set of reeds pretty quickly. Quote Link to comment Share on other sites More sharing options...
99bansheeboy Posted October 11, 2009 Author Report Share Posted October 11, 2009 It is not detonation. Detonation is a rattling sound. It sounds like marbles or ball bearings rattling around in the top end. The back fire is from it being lean. A back fire can trash a set of reeds pretty quickly. ok thanks , luckily i stopped pretty much right after it happened Quote Link to comment Share on other sites More sharing options...
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