Wierd every so often occurance

[Powder Monkey]

Sometimes when I am going slow and change down from second to first and then clutch out I get what is like a backfire but it sounds like its coming from the throttle bodies - not definate that it is just sounds like it is - but leaning more towards the frnt of the bike than from the exhaust. It doesn't happen all the time and it keeps suprising me and I'm having trouble deliberately replicating it so I can pin down exactly where its coming from.

Anyone had anything similar - i got trip K&Ns and stock exhaust atm, and I'm still on run in got about 200ks on the clock and i would say its happened 3-4 times.

Cheers

Si

 

[travelguy]

yep.. mine has done that from the beginning.. more of a "lupe" type sound, kinda like a big bubble coming to the surface ..out of the throttle bodies.. mine does it occationally when fired up from cold about 10 secs into the warm up and occationally when im sitting at a stop light blipping the throttle..

 

[Powder Monkey]

Cool so long as someone elses is doing it, its all good!!

 

[travelguy]

im swapping the throttle bodys tomorrow so we'll see if it still does it.

 

[CanberraR3]

I wouldn't worry about that noise; pretty normal, especially when warming up.

 

[bruce aussie]

My R3R backfired through the air cleaner sometimes when you blip the throttle on the down change at the lights. At times stalling the engine Triumph Springwood said they all do that.With the standard air intake you can feel it through the seat. I fitted a PCV and got a custom tune on serco's dyno hasn't done it again.

 

[HellFire]

My R3R backfired through the air cleaner sometimes when you blip the throttle on the down change at the lights. At times stalling the engine Triumph Springwood said they all do that.With the standard air intake you can feel it through the seat. I fitted a PCV and got a custom tune on serco's dyno hasn't done it again.

+1 Mine too, I got out of the habit of blipping the throttle because of it. It was a bad habit anyway.

 

[RKTNMYPKT]

yep.. mine has done that from the beginning.. more of a "lupe" type sound, kinda like a big bubble coming to the surface ..out of the throttle bodies.. mine does it occationally when fired up from cold about 10 secs into the warm up and occationally when im sitting at a stop light blipping the throttle..

What the Hell is a "Lupe" type sound
is Mexican aware of this?

 

[travelguy]

What the Hell is a "Lupe" type sound
is Mexican aware of this?

hah is loop pc ?

 

[Powder Monkey]

My R3R backfired through the air cleaner sometimes when you blip the throttle on the down change at the lights. At times stalling the engine Triumph Springwood said they all do that.With the standard air intake you can feel it through the seat. I fitted a PCV and got a custom tune on serco's dyno hasn't done it again.

Yep thats exactly it, got the PCV already hope it disappears when it gets dyno'd