Aftermarket exhaust

[Paul Bryant]

Backfiring is usually caused by detonation of unburnt fuel. One cause of that would be a rich condition. Best way to tell is on a loaded dyno with a sniffer.

So why is it that enriching up a little on the zero throttle setting eliminates this decel popping ?

 

[Lamonster]

So why is it that enriching up a little on the zero throttle setting eliminates this decel popping ?

So what do think is popping if it's not fuel?

 

[Paul Bryant]

So what do think is popping if it's not fuel?

You didn't answer my question.

 

[Lamonster]

You didn't answer my question.

You didn't answer my question.

Here's a good explanation of why it could be lean or rich and why I said I plan on putting mine on a dyno and checking. Just because it could be lean on decel doesn't mean it's lean through out the power-band. MasterTune Common Tuning Problems

 

[Paul Bryant]

Here's a good explanation of why it could be lean or rich and why I said I plan on putting mine on a dyno and checking. Just because it could be lean on decel doesn't mean it's lean through out the power-band. MasterTune Common Tuning Problems

Correct, that is two different situations.
And yes, only the Dyno will tell the exact situation.

 

[dougl]

It’s lean in the cylinder at 0 throttle under load and the fuel doesn’t ignite in the cylinder. It passes into the exhaust manifold and explodes. My last Rocket had ridiculous explosions. This is fixable with a Power Commander where you can add fuel in the zero throttle position column. When is Dynojet going to release one for this bike?

 

[sleeves]

It’s lean in the cylinder at 0 throttle under load and the fuel doesn’t ignite in the cylinder. It passes into the exhaust manifold and explodes. My last Rocket had ridiculous explosions. This is fixable with a Power Commander where you can add fuel in the zero throttle position column. When is Dynojet going to release one for this bike?

Thank you been offline. Adding fuel on L table stops backfiring on old models.
Think putting on dyno good idea but doubt tuners have tools or access to ECU to correct at this stage. Will happen though.

 

[Larry_M]

To you exhaust 'gurus' out there (if you frequent this forum) I remember reading decades ago that and engine needs a certain volume in the muffler/s for optimal street performance (i know the MotoGP bikes have an empty coke can on the end of the pipe, but they don't have to run well through the rev range)
Any thoughts on how it might affect performance replacing the OEM wood stove beneath the engine with just a single muffler, the same size you would find on a 600-1000 cc bike?

 

[Wadejesu]

Visordown.com: Competition Werkes to release Triumph Rocket 3 GP Slip-On Exhaust.

Competition Werkes to release Triumph Rocket 3 GP Slip-On Exhaust

The new system for the Triumph is said to save a lot of weight and it makes the Rocket 3 sound superb!

www.visordown.com

Wonder if triumph will come out with a cat delete pipe like they did way back in 04 the spaghetti looking stainless steel pipe that eliminated the cat

 

[Larry_M]

Wonder if triumph will come out with a cat delete pipe like they did way back in 04 the spaghetti looking stainless steel pipe that eliminated the cat

I seriously doubt that they would first adapt the bike to EURO 5 then offer a way to circumvent it