07 Roadliner Backfire - Page 2 - Motorcycle-Journal Forums

07rdliner · 05-07-2007, 12:42 AM

Had district service rep come and inspect my bike. He put a new set of yamaha drag pipes on the bike and "tuned" it. It still backfires, just not as often or as loud as before but still too often and too loud. My O2 is still connected and I think they are tuning to meet emission standards.

07rdliner · 05-07-2007, 12:47 AM

Just made a trip from Baton Rouge, LA to Hot Springs, AR. The bike ran great but, it is very diappointing after cruising so well to have it pop as you slow down to enter a small town.

Franklyspeaking · 05-25-2007, 08:14 PM

I just had my third set of pipes installed They're the Cobra Speedster Extra Longs. I left the baffles in. I'm running the proper power commander map with a PR BAK. I STILL have backfire. The O2 sensor is not just disabled but it is no longer on the bike. I'm lost.

FS

longwolf15 · 05-26-2007, 01:19 AM

FS

Have you tried Frankenstein's "perfect fuel map" for a Roadliner with PR Bac and cobra pipes? It's either on here or the delphi page under "perfect fuel map." It would be worth a shot if not.

Hang in there!

Franklyspeaking · 05-26-2007, 09:56 AM

Thanks, I'll give it a shot.

FS

rbanta · 05-27-2007, 10:52 PM

Quote:

Originally Posted by Franklyspeaking

Thanks, I'll give it a shot.

FS

Franklyspeaking · 05-28-2007, 10:39 PM

Thanks for the suggestion. However, using the PC III, I increased the "0" throttle mixture from the original map setting of -35% to +30% from 1500 RPM's up.From 1500 down I'm at zero change from stock. That got rid of the backfire. I just don't know how great it is for the bike...actually if someone could let me know if +30% is OK at zero throttle, I'd appreciate it. That's a long way from the PC III's original setting of -35%.

FS

JRoc · 05-30-2007, 11:41 AM

F X S T E I N - Frankenstein's blog | Perfect Custom Fuel Map on the Dyno

Good Luck

Franklyspeaking · 06-01-2007, 08:17 PM

Thanks, I'll take a look

CTCruiser · 12-27-2007, 08:00 PM

I have a question...Does the Yamaha drag pipes loose the EXUP or no?

shroom · 12-29-2007, 06:07 AM

Quote:

Originally Posted by CTCruiser

I have a question...Does the Yamaha drag pipes loose the EXUP or no?

Yes. They do have a crossover tube that helps with low end torque, but the EXUP is gone.

trizav2 · 03-05-2008, 11:10 PM

Quote:

Originally Posted by longwolf15

Franklyspeaking

I hate to add insult to injury, but my Roadliner has 3" Hard Chrome straits and a Power Commander PCIII on it, and I do have popping, but only when it's cold. So, only for the first half mile or so after it's been sitting for a while, and that's not all the time. I did have much more popping in the beginning until I downloaded the map that matched my bike the closest. My pipes and PCIII were on the bike I test road. I liked them so much that I had them move the pipes and put a new PCIII on mine out of the crate. It's been a good combo so far. I want to add the Patrick BAK as soon as I can afford it. I wish you the best of luck.

I have the same setup but am getting backfire. Which map are you using?

WillieWherry · 03-06-2008, 07:41 AM

Have it Dynoed. Quit screwing around guessing. Anytime you back off a big motor your going to stand a chance of popping. The fuel air mixture is critical at that point. You can't run an O2 sensor with a processor or straight pipes. Yam does not spray there cylinders with fuel when you back down. That's BS. If you believe that, no wonder you can't get the fuel/air mix correct. You need professional help. You and the bike

. Get it Dynoed quit guessing before you burn a piston. Spray the cylinders with fuel? LOL. Yam does sprays the crank, mains and rods with oil as it runs.

Willie

longwolf15 · 03-06-2008, 07:14 PM

My wife gave me a custom fuel map for my birthday, and I wouldn't go back (98 Hp and 128 ft lbs). I have 3" HK Big Straits, a Power Commander, and a PR BAK. Before the custom map I rarely got popping or back firing. It only happened when the bike was cold, or when I was accelerating and letting off repeatedly. Only on very twisty roads. With the new map I have more popping than before, but it's still not annoying.

If you have a more specific question I'll be happy to answer it.

Good Luck!

demingrickjames · 03-07-2008, 09:42 PM

I have an 07 Staratoliner with the Patrick BAK, Cobra FI2000R, and CObra X-tra longs. The O2 sensor is connected and the bike never backfires.

Everyone I've talked to has problems getting the PCIII to work properly.

WillieWherry · 03-08-2008, 12:26 PM

My PCIII works GREAT. I love it. But I set mine up on a DYNO. You can't begin to out guess the bike. Every bike is different. There is no way you can run a fuel processor and a O2 sensor and get any type of changes in the fuel ratio. The O2 sensor will auto change any changes the processor is programmed for. They are there to control the fuel air ratio for emissions. The only time I have any popping of any kind is at start up and that is because its cold and not burning all the fuel in the cylinder until it warms up. Play with the buttons all you want, but you won't get correct until you put it on a Dyno.

Willie

demingrickjames · 03-09-2008, 04:05 PM

I'm not saying you're totally wrong, but, the cobra processor doesn't change the stock fuel map, so you need th O2 sensor installed for the stock ecm to adjust for cold idle, altitude, etc.

Please do a little research on the Cobra fi2000r processor.

It does send more fuel to the throttle bodies with the O2 sensor installed.

"Running Correct" to me is exactly what my bike does; Starts up immediately, idles smooth, accellerates great, NEVER backfires!

I dont need a dyno to tell me that.

WillieWherry · 03-15-2008, 07:31 AM

Quote:

Originally Posted by demingrickjames

I'm not saying you're totally wrong, but, the cobra processor doesn't change the stock fuel map, so you need th O2 sensor installed for the stock ecm to adjust for cold idle, altitude, etc.

Please do a little research on the Cobra fi2000r processor.

It does send more fuel to the throttle bodies with the O2 sensor installed.

"Running Correct" to me is exactly what my bike does; Starts up immediately, idles smooth, accellerates great, NEVER backfires!

I don't need a dyno to tell me that.

If you believe that. I have a bridge I am sure you would like to own. If your running the O2 sensor your not even using the added processor. Your changing nothing. Changing the map is the whole idea of the processor.

Willie

demingrickjames · 03-15-2008, 10:15 PM

Once again, do some research before you start talking.

The cobra processor adds more fuel after the stock ecm has made all it's adjustments.

Just made the same mods to my buddies 08 Raider last night (PR air kit and Cobra fi2000r for roadliner and a set of Cobra Dragster pipes) and once again, no backfiring.

The pots on both processors are set at 3,3,5.

WillieWherry · 03-15-2008, 11:01 PM

The O2 sensor gives the stock processor the info to regulate the fuel air mix. You aren't changing a thing. It's your bike do as you like.

Willie

05-25-2007, 08:14 PM	#23 (permalink)
Franklyspeaking Seat Tester Join Date: Sep 2006 Bike: '06 Stratoliner Location: Alto, MI Posts: 96	I just had my third set of pipes installed They're the Cobra Speedster Extra Longs. I left the baffles in. I'm running the proper power commander map with a PR BAK. I STILL have backfire. The O2 sensor is not just disabled but it is no longer on the bike. I'm lost. FS __________________

05-26-2007, 09:56 AM	#25 (permalink)
Franklyspeaking Seat Tester Join Date: Sep 2006 Bike: '06 Stratoliner Location: Alto, MI Posts: 96	Backfire Thanks, I'll give it a shot. FS __________________

05-28-2007, 10:39 PM	#27 (permalink)
Franklyspeaking Seat Tester Join Date: Sep 2006 Bike: '06 Stratoliner Location: Alto, MI Posts: 96	Backfire Thanks for the suggestion. However, using the PC III, I increased the "0" throttle mixture from the original map setting of -35% to +30% from 1500 RPM's up.From 1500 down I'm at zero change from stock. That got rid of the backfire. I just don't know how great it is for the bike...actually if someone could let me know if +30% is OK at zero throttle, I'd appreciate it. That's a long way from the PC III's original setting of -35%. FS __________________

06-01-2007, 08:17 PM	#29 (permalink)
Franklyspeaking Seat Tester Join Date: Sep 2006 Bike: '06 Stratoliner Location: Alto, MI Posts: 96	Thanks, I'll take a look __________________

03-06-2008, 07:41 AM	#33 (permalink)
WillieWherry Clunked into first gear Join Date: Oct 2006 Bike: 06 Roadliner Location: South East Michigan Posts: 200	Have it Dynoed. Quit screwing around guessing. Anytime you back off a big motor your going to stand a chance of popping. The fuel air mixture is critical at that point. You can't run an O2 sensor with a processor or straight pipes. Yam does not spray there cylinders with fuel when you back down. That's BS. If you believe that, no wonder you can't get the fuel/air mix correct. You need professional help. You and the bike. Get it Dynoed quit guessing before you burn a piston. Spray the cylinders with fuel? LOL. Yam does sprays the crank, mains and rods with oil as it runs. Willie

05-07-2007, 12:42 AM	#21 (permalink)
07rdliner Newbie Join Date: Apr 2007 Bike: 07 Roadliner S Location: Denham Springs, LA Posts: 9	Had district service rep come and inspect my bike. He put a new set of yamaha drag pipes on the bike and "tuned" it. It still backfires, just not as often or as loud as before but still too often and too loud. My O2 is still connected and I think they are tuning to meet emission standards.

05-07-2007, 12:47 AM	#22 (permalink)
07rdliner Newbie Join Date: Apr 2007 Bike: 07 Roadliner S Location: Denham Springs, LA Posts: 9	Just made a trip from Baton Rouge, LA to Hot Springs, AR. The bike ran great but, it is very diappointing after cruising so well to have it pop as you slow down to enter a small town.

05-26-2007, 01:19 AM	#24 (permalink)
longwolf15 Newbie Join Date: Apr 2007 Bike: 06 Roadliner S Location: NC Posts: 5	FS Have you tried Frankenstein's "perfect fuel map" for a Roadliner with PR Bac and cobra pipes? It's either on here or the delphi page under "perfect fuel map." It would be worth a shot if not. Hang in there!

05-30-2007, 11:41 AM	#28 (permalink)
JRoc In Training Join Date: Sep 2006 Bike: 2006 Star Stratoliner 2005 KTM 625smc Location: New York Posts: 104	F X S T E I N - Frankenstein's blog \| Perfect Custom Fuel Map on the Dyno Good Luck

12-27-2007, 08:00 PM	#30 (permalink)
CTCruiser Where Am I ? Join Date: Dec 2007 Posts: 38	I have a question...Does the Yamaha drag pipes loose the EXUP or no?

03-06-2008, 07:14 PM	#34 (permalink)
longwolf15 Newbie Join Date: Apr 2007 Bike: 06 Roadliner S Location: NC Posts: 5	My wife gave me a custom fuel map for my birthday, and I wouldn't go back (98 Hp and 128 ft lbs). I have 3" HK Big Straits, a Power Commander, and a PR BAK. Before the custom map I rarely got popping or back firing. It only happened when the bike was cold, or when I was accelerating and letting off repeatedly. Only on very twisty roads. With the new map I have more popping than before, but it's still not annoying. If you have a more specific question I'll be happy to answer it. Good Luck!

03-07-2008, 09:42 PM	#35 (permalink)
demingrickjames Ditch Magnet Join Date: Feb 2008 Bike: 2007 Yamaha Stratoliner Location: Deming, NM Posts: 167	I have an 07 Staratoliner with the Patrick BAK, Cobra FI2000R, and CObra X-tra longs. The O2 sensor is connected and the bike never backfires. Everyone I've talked to has problems getting the PCIII to work properly. __________________

03-08-2008, 12:26 PM	#36 (permalink)
WillieWherry Clunked into first gear Join Date: Oct 2006 Bike: 06 Roadliner Location: South East Michigan Posts: 200	My PCIII works GREAT. I love it. But I set mine up on a DYNO. You can't begin to out guess the bike. Every bike is different. There is no way you can run a fuel processor and a O2 sensor and get any type of changes in the fuel ratio. The O2 sensor will auto change any changes the processor is programmed for. They are there to control the fuel air ratio for emissions. The only time I have any popping of any kind is at start up and that is because its cold and not burning all the fuel in the cylinder until it warms up. Play with the buttons all you want, but you won't get correct until you put it on a Dyno. Willie

03-09-2008, 04:05 PM	#37 (permalink)
demingrickjames Ditch Magnet Join Date: Feb 2008 Bike: 2007 Yamaha Stratoliner Location: Deming, NM Posts: 167	I'm not saying you're totally wrong, but, the cobra processor doesn't change the stock fuel map, so you need th O2 sensor installed for the stock ecm to adjust for cold idle, altitude, etc. Please do a little research on the Cobra fi2000r processor. It does send more fuel to the throttle bodies with the O2 sensor installed. "Running Correct" to me is exactly what my bike does; Starts up immediately, idles smooth, accellerates great, NEVER backfires! I dont need a dyno to tell me that. __________________

03-15-2008, 10:15 PM	#39 (permalink)
demingrickjames Ditch Magnet Join Date: Feb 2008 Bike: 2007 Yamaha Stratoliner Location: Deming, NM Posts: 167	Once again, do some research before you start talking. The cobra processor adds more fuel after the stock ecm has made all it's adjustments. Just made the same mods to my buddies 08 Raider last night (PR air kit and Cobra fi2000r for roadliner and a set of Cobra Dragster pipes) and once again, no backfiring. The pots on both processors are set at 3,3,5. __________________

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03-15-2008, 11:01 PM	#40 (permalink)
WillieWherry Clunked into first gear Join Date: Oct 2006 Bike: 06 Roadliner Location: South East Michigan Posts: 200	The O2 sensor gives the stock processor the info to regulate the fuel air mix. You aren't changing a thing. It's your bike do as you like. Willie

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