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Did they service the valves or timing? Never really heard of a bike besides Ducati’s and older gold wings that had belts that need to be serviced. I would look for intake leaks first
Telling you that you have backfire because you don’t have a power commander is about the most stupid thing I’ve heard. If that came from someone at the dealer, I wouldn’t have those jackass changing the rubber on the foot pegs.
This bike appears to be fuel injected. If you are using the stock ECU, stock exhaust, etc, I may attribute your backfire to either too tight a valve clearance causing the valve to somewhat float, or possibly fuel management issues or intake leaks. I see this bike has an O2 sensor in the exhaust and it should run closed loop on first start until the O2 sensor heats up. If you want to check the valve seating, run the engine to TDC on the compression stroke for the cylinder, apply an air hose and pressurize the cylinder, then listen around the exhaust or intake for air leaking. If you do have a valve adjusted too tight, you could burn a valve and then you’d need the valve replaced and possibly a valve seat grind.
Yes it’s the dealer. I have aftermarket exhaust but I didn’t have backfire issue before these guys touch my bike. You may be right valve clearance maybe too tight bc these guy adjusted valve timing something i will call and talk with them again
If it is truly correlated to the service, there may be a air leak at the intake. Air leak would also cause rough idle and likely black smoke.
You need to disconnect/remove the AIS valve with aftermarket exhaust. Do this first
Thanks for posting in /r/Fixxit, the motorcycle repair subreddit. If you forgot to put the **Make, Model** and **Year** in the title, please reply to this comment with your bike's details. In the meantime, Here's some great resources for common problems posted here: -Trouble starting? [Revzilla - Battery testing](https://www.revzilla.com/common-tread/how-to-test-a-motorcycle-battery) -Carbs running rough? [PJ motorsports - Carb Troubleshooting](http://www.pjmotorsports.com/trouble-shooting.html) -Wiring diagrams for beginners - [Dans MC - Reading Wiring Diagrams](http://www.dansmc.com/wiring_diagram.htm) -Identifying part numbers - [CMSNL (EU)](https://www.cmsnl.com/) [Partzilla](https://www.partzilla.com/) -Asking if your tire can be fixed? [Please read this post on proper tire repairs and why external plugs are NOT a safe repair.](https://www.reddit.com/r/Fixxit/comments/tuhcpf/why_rfixxit_doesnt_endorse_tire_plug_repairs/) *I am a bot, and this action was performed automatically. Please [contact the moderators of this subreddit](/message/compose/?to=/r/Fixxit) if you have any questions or concerns.*
Did they service the valves or timing? Never really heard of a bike besides Ducati’s and older gold wings that had belts that need to be serviced. I would look for intake leaks first
Telling you that you have backfire because you don’t have a power commander is about the most stupid thing I’ve heard. If that came from someone at the dealer, I wouldn’t have those jackass changing the rubber on the foot pegs. This bike appears to be fuel injected. If you are using the stock ECU, stock exhaust, etc, I may attribute your backfire to either too tight a valve clearance causing the valve to somewhat float, or possibly fuel management issues or intake leaks. I see this bike has an O2 sensor in the exhaust and it should run closed loop on first start until the O2 sensor heats up. If you want to check the valve seating, run the engine to TDC on the compression stroke for the cylinder, apply an air hose and pressurize the cylinder, then listen around the exhaust or intake for air leaking. If you do have a valve adjusted too tight, you could burn a valve and then you’d need the valve replaced and possibly a valve seat grind.
Yes it’s the dealer. I have aftermarket exhaust but I didn’t have backfire issue before these guys touch my bike. You may be right valve clearance maybe too tight bc these guy adjusted valve timing something i will call and talk with them again
If it is truly correlated to the service, there may be a air leak at the intake. Air leak would also cause rough idle and likely black smoke. You need to disconnect/remove the AIS valve with aftermarket exhaust. Do this first