Exhaust Popping - running lean?

ruzzle said:

"Secondary air injection eliminator?" My my, the stuff these supposedly knowledgeable factory reps dream up to cover their total absence of facts. Bullsh..t...... Why can't they just admit they don't have a clue?

Since someone has fiddled around with the exhaust at some stage, I reckon the first move would be to find and fix air leaks into the exhaust?

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HansO said:

He he "Secondary Air Injection" wow I didn't know we had one of those just imagine what would happen if we turned it up!! Would it be like have Super Charger Ha Ha.
What Ruzz said is bloody true, you should ask the Triumph Auss rep to send you a picture of .... The wanker

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Silli said:

My 2007 classic has done the same thing since I had the exhaust mods done. I quite like it, but then - I am a bit weird.

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CanberraR3 said:

The 865 engine has secondary air injection. Pops air into the head after the exhaust valve to facilitate ignition in the header pipe of I burnt fuel. It causes some popping and excessive heat. You can see the air injector sitting next to the spark plug.



Removal does nothing for performance but does make the bike run a little cooler, smoother and dirtier.

You dealer is having trouble telling the difference between a Rocket engine and an 865????

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Huskerider00 said:

Excessive "popping" is usually a lean fuel air ratio. as others noted, this is fairly common with after market pipes reducing back pressure which translates to changing cylinder conditions and due to the lower back pressure the O2 sensor becomes less sensitive. Also means poor low end throttle response and hesitation at low cruising speeds. Your bike needs to have its computer reprogrammed or add a power commander or other fuel manager to enrich the mixture and compensate the reduced back pressure. However, a vacuum leak such as rotted or loose vac hoses can also cause issues, but you usually get a check engine and the dreaded high idels response. These bikes are relatively sophisticated and changes to exhaust or intake are a sticky wicket without proper ECU compensations.

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Macrider said:

Popping on deceleration is ok, it is normal with aftermarket pipes, popping is caused by unburned fuel in small amounts inside the exhaust system.
Backfiring on deceleration is NOT ok, that is an indication that detonation is occuring inside the combustion chamber {engine}

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Macrider said:

Popping on deceleration is ok, it is normal with aftermarket pipes, popping is caused by unburned fuel in small amounts inside the exhaust system.
Backfiring on deceleration is NOT ok, that is an indication that detonation is occuring inside the combustion chamber {engine}

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