Triumphrat

kidkazi · 06-19-2007

hello,

this just happened to me when i got home from work, a six mile ride. well, i turn off my bike and couple seconds after it's completely off, a deep low puff comes out of the exhaust. kinda like how a car can backfire but not that high sound, a low deep sound.

This has never happened to my bike before and it only has 6xx miles on it. Just wondering if anyone experienced this and if this is normal. also, any ways to prevent this from happening again?

thanks.

rodburner · 06-19-2007

Never experienced that before.When I come in from a ride,whether its 6 or 60,my bike just shuts off and goes completely silent.No tinkling or ticking or anything.Not like any car I`ve ever owned. Its been the most eerie sound [or un sound] since the very first day I rode it home. :???:

badrufus · 06-20-2007

No, not normal. Without knowing your state of tune, it's hard to diagnose. Sometimes, if a bike is running rich, it will do that as it burns off excess fuel when you stop; however, popping and even back firing on deceleration is common in a lean condition. What silencers, jets, etc are you running?

RedBird · 06-20-2007

I have had mine pop pretty loud a few times when I started it up after sitting a few minutes--engine warm. I have never had what you describe happen. I assume you have the Air Injection (AI) system intact. Did you by chance blip the throttle just before shutting off the engine?

Larry

mecscc · 06-20-2007

ditto on Larry's question. Sounds like you got a little post engine spontaneous ignition. What you describe is not a "back fire." And is actually encouraged by the AI system.

If you blip the throttle and then shut down you will send a lot of unburned mixture into the exhaust which can combust. If not, and it continues to do it, exercize your warranty and have the dealer look at it. Otherwise, forget it- and just shut down at idle from now on.

Monte

GCA · 06-20-2007

The exact same thing has happened to me a couple of times. (Bone stock bike, by the way)

However, it has only happened when pulling up into my garage. There's a little kinda rounded lip between the garage and driveway- the garage floor is about an inch higher, so when I'm pulling in I usually roll the throttle a touch to get up and in, 'cause at that point I'm travelling slowly enough that it takes some manpower to roll the weight up. I assumed that the low pop was just unignited fuel in the exhaust beacuse I shut her down a second or two too soon... of course, if it happened in a different condition, then I'd probably be asking questions myself.

kidkazi · 06-20-2007

my bonne is bone stock. i may have bliped the throttle before shut down. btw, what will happen if i take out the AI, pros and cons?

Kurtis · 06-20-2007

Mine's done it a few times. I like it though and try to make it happen!

But I also flick the kill switch while riding along to make it pop and bang for the same reason.

Removing the SAI system will stop your pipes going quite as blue, slightly cooler running and less weight and complexity. The cost is more hydrocarbon and CO exhaust emissions.

GOZO · 06-20-2007

KURTIS ....Remove SAI to reduce weight !!!!!

I don't think any of us road riders are that desperate to loose a few grammes. Might be different if your a racer.

Stick to what the members say, excess fuel, hot pipes will cause it , BUT shouldn't, so if it continues take it back to the dealer.

Good luck.

Kurtis · 06-20-2007

Every last gramme!

I even weighed it all when I took it off! I think it came to about half a kilo with the pipes, spigots and solenoid/reed valve...

Then I added some weight in the form of two screws and a cork and some dum dum for the airbox.