Aero-M Posted January 25, 2012 Share Posted January 25, 2012 I have no mechanical knowledge I'm affaid, so just fitted a scorpion race exhaust to my motorbike and when revving it is spitting out quite a lot of flames and pops. How would changing the exhaust can do this? It didn't do out before with the standard exhaust? Quote Link to comment Share on other sites More sharing options...
Robzki Posted January 25, 2012 Share Posted January 25, 2012 Probably for 2 main reasons, you have effectively changed the fueling by altering the back pressure in the exhaust. you may need to rejet the carbs, also I expect the original can had more baffles these stop flaming/detonation as well as suppress noise. your new one is probably louder with a more free flowing design. Quote Link to comment Share on other sites More sharing options...
Purity14 Posted January 25, 2012 Share Posted January 25, 2012 Probably for 2 main reasons, you have effectively changed the fueling by altering the back pressure in the exhaust. you may need to rejet the carbs, also I expect the original can had more baffles these stop flaming/detonation as well as suppress noise. your new one is probably louder with a more free flowing design. This. Carbs or Injection? What are you revving it to? Quote Link to comment Share on other sites More sharing options...
Havard Posted January 25, 2012 Share Posted January 25, 2012 Sounds cool though..!! Quote Link to comment Share on other sites More sharing options...
Aero-M Posted January 25, 2012 Author Share Posted January 25, 2012 Only revving to 8000 rpm, redline is 13500. It does sound cool yes, but I'm worried it shouldn't be doing it. Is it going to damage the engine like this? It is carbs not injection. Quote Link to comment Share on other sites More sharing options...
Dnk Posted January 25, 2012 Share Posted January 25, 2012 Doesn't the exhaust manufacturer recommend re jetting the carbs ? I have a mate who does this all the time to bikes after he's changed exhausts for people, he has a dyno jet rolling rd which is what i'd do with your bike if it were mine just to be safe at least Quote Link to comment Share on other sites More sharing options...
Swampy442 Posted January 25, 2012 Share Posted January 25, 2012 As above, your carbs need setting up, youre overfuelling quite badly. Quote Link to comment Share on other sites More sharing options...
Aero-M Posted January 25, 2012 Author Share Posted January 25, 2012 Ok thanks, I will have to get it booked in to the garage and sorted out. will it cause any damage if I use it before they are adjusted? Quote Link to comment Share on other sites More sharing options...
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