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bofadeez 09-29-2005, 03:58 AM my bike backfires under hard deceleration. have full m4 ss exhaust/carbon canister and power commander II. how do i get rid of it cuz i know its not healthy for the bike but its fun. people have told me it sounds like a shotgun wolph69 09-29-2005, 04:00 AM why don't you take it in and get it tuned? you have the power commander, what map aree you running? Jimmy 2 Times 09-29-2005, 04:00 AM Im sure you clothes prolly smell like shit when you are done riding too huh? allprobmx 09-29-2005, 04:01 AM but it sounds cool! bofadeez 09-29-2005, 04:09 AM im running the map given by power commander for the m4 exhaust it backfired b4 i installed the pcII SPL170db 09-29-2005, 04:31 AM How does the exit look on the exhaust can opening? What color is it (white, gray, black)? Backfiring is usually an indicator that you are running rich. fugitiveorphan 09-29-2005, 06:32 AM btw, that's an afterfire. as spl said, prolly running rich, but not necessarily. even GP bikes afterfire like hell, and i'm pretty sure they have their FI mapped to specs... Daryl 636 09-29-2005, 06:35 AM unburnt fuel, nothing to worry about. gixxerfever 09-29-2005, 06:43 AM it is fine for the bike, but you can get it remapped, flatlandrider 09-29-2005, 08:25 AM But why would you want to, the flame is really cool to SPL170db 09-29-2005, 08:57 AM But why would you want to, the flame is really cool to He does have a point. Alot of guys would kill for that. I say you sell the bike to a squid and tell him you got it specially modded to do that, he'll think it's the greatest thing since sliced bread meets Fast and the Furious. doomass1 09-29-2005, 09:09 AM My buddy has got a 600 that does it.Looks cool as shit at night. spongebob 09-29-2005, 10:00 AM all race bikes do it...at least the thousands that i have seen/heard... Stall 09-29-2005, 12:22 PM It is because the GSXR's use an air injection pump to dillute the exhaust for emisions. But pumping fresh air into the exhaust makes any unburned fuel ignite,causing a backfire. Get a set of block off plates . http://www.muzzys.com/1300-AI/ spongebob 09-29-2005, 04:25 PM stall, mine still does it..and i dont have that valve.. 05gixxerjockey 09-30-2005, 02:35 AM stall... with the exception of the california models, gixxers do not have an air injection system. the link that you supplied are for busa's anyways. oh and as far as fixing the prob.... there's nothing you can do about it really, except to leaning out the mix in a PC a hair. even that won't stop it all together. Fireblade_Rider 09-30-2005, 03:57 AM My 1000RR does the same thing. You can click anouther gear up and you shouldn't have a problum http://www.gixxer.com/forums/images/graemlins/smirk.gif cfgsxr11 10-01-2005, 04:56 PM i got a 04 600 and i shoot a blue flame outta my carbon yosh rs-3 markbsae 10-01-2005, 05:31 PM stall, mine still does it..and i dont have that valve.. Yes you do. It is the PAIR system. The added air is what is causing the back fires. | ||