So I'll cut to the chase. I have an '03 R6. After the bike warms up it's hit or miss as to whether or not the symptoms occur.
But here are the symptoms:
I got this bike used and it started giving this problem around late October/early November IIRC; I got it in September 2019. As for the Yoshi, I got that put on on Sept. 26th if that's relevant.
The problem was never this bad but it has progressively gotten worse. I have provided as much info as possible, but I can also get a video if I check my GoPro footage for it. Any ideas on what it could be? I'm really tight on cash so I'm scared to take it to my mechanic for labor charges.
But here are the symptoms:
- Idle gets extremely rough and if throttle is let go in some cases it will simply die (bike struggles to stay alive pretty much)
- There is a VERY strong smell of gas initially, can sometimes last a while
- The exhaust can shoot flames very easily (only after releasing throttle though, so I don't think it's backfiring but I'm also inept when it comes to the terminology)
- The pops it does are can be very quick, and very powerful, moreso than usual, to the point that my parents thought a gunshot went off in the back of the house
- Power becomes steady above 5k, but prior to that (such as holding the throttle steady at 4k) the bike will sort of go bUMbUMbUM in a slight lurching, inconsistent manner
- The closer to 5k the more moot the previous point becomes
- After 5k the problem doesn't exist
- In some extreme cases I can pull the clutch in while riding and the bike WILL shut off
- Replaced the spark plugs
- Checked the ignition coils
- I did a resistance test. Primary was fine and all of them were around 5.1kOhms except for one at 5.6kOhms. This was still within spec.
- I did the "water evaporating" test on the headers, and the first and last evaporated slowly. I switched the coils and the same pipes remained slow to evaporate. That makes me think either this is normal or it's the wiring subharness?
- These are not Denso coils
- Changed the oil
- Fuel stabilizer
- Replaced the R/R (I had a code 46 at one point and that was an issue, diode test failed)
- Checked stator for resistance, continuity, and AC volts; checked fine
- Around 41k miles
- Valve adjustment done at 36k miles
- Yoshimura Slip-On exhaust
- Changed the spark plugs
- A snazzy R6 brake reservoir sock on the front reservoir (I wish this were the problem)
I got this bike used and it started giving this problem around late October/early November IIRC; I got it in September 2019. As for the Yoshi, I got that put on on Sept. 26th if that's relevant.
The problem was never this bad but it has progressively gotten worse. I have provided as much info as possible, but I can also get a video if I check my GoPro footage for it. Any ideas on what it could be? I'm really tight on cash so I'm scared to take it to my mechanic for labor charges.