Misfire or Exhaust Baffles?

[Guest]

Let the bike idle as I put my gear on this morning, due to the bike not being ridden for a few days and being left outside in freezing temps.

Usually I'd hop on, start it up, couple of blips of the throttle to get the neighbours out of bed ([emoji6]) and away I go.

After a few mins I notice the idle changed tone, a lot. Blip the throttle and it now "barks" as opposed to revving smoothly.

https://vimeo.com/192811129

TLDR:

Bike now "barks" instead of revving smooth.

[ThePhatomfart]

Hi Liam, have a look at the air temp sensor in the air box ,just check thats clean, and working ok.Bill

[Northern Biker]

How old is the exhaust?

[Stu]

thats certainly missing a little

did it clear once warmed up?

[Joeman]

Have you been messing with the mapping??

[Guest]

Have you been messing with the mapping??

About a week or so ago I adjusted the fueling as it was cutting out at low RPM (a common mapping problem on TT600's)

The only reason I don't think it's to do with the map is that it didn't happen overnight, the bikes been fine since the updated map and only happened once the bike was warmed up?

[Guest]

TuneECU also reads ignition and coil pulse timing, which all haven't changed.. which confuses me even more as to what the problem is.

[Guest]

TuneECU also reads ignition and coil pulse timing, which all haven't changed.. which confuses me even more as to what the problem is.

A fouled up plug wont show there though as its still being told to spark and possibly is but not clean

[Guest]

Fair point. So looks like a new set of plugs?

[Guest]

Just got back from the garage, he also thinks it's a misfire. Luckily I bought a replacement a while ago so it's ready to be identified and it's only the 1 that's on it's way out.

Bumpy idle

Hesitates below 3-4K

After 4K it's perfect (unloaded)

So it's booked in on sat. Whilst the petrol tank is off I'm gonna get the spark plugs updated too.

[Guest]

Looks to be the IACV needs replaced or resealed. The mechanics sprayed some petrol into/onto it and the bike instantly sprung to life before quickly going back to sounding horrible as the obvious air leak came back.

http://uploads.tapatalk-cdn.com/20161128/8fe96edc177d778032307b44a20c153d.jpg

[Guest]

All sorted. Small split in the hose and resealed the IACV.