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Send that picture to your dealer. Looks like the cat is overheating. May be a fueling issue. Saw one here in May.
Check the spark plugs. A misfiring plug can send raw fuel out which runs the converter very hot.
Looks like a single TB Model V7. If it's under warranty I would take it in. Have it serviced, not just the oil changed. Have it checked for errors w/software.
I'll certainly send the picture down. I believe it is a feeling problem. Open the throttle quickly and the thing 'dies'. There is a distinct smell of unburned fuel when shutting down after a ride. Excuse my ignorance (and being too lazy to look up in the tech manual for the sake of this reply) where is the Cat located? can it be replaced?
I'd think you'd know if it was mis-firing for sure. I know I would.
The cats are located inside each muffler. There was a member here who had a similar issue. With his new V7. Can't remember who it was.
Have you made any mods, such as an O2 spoofer? It's pretty clear that you are getting too much fuel on one side. These bikes seem to run much better when left dead stock, particularly after getting the latest version of the factory flash. I seem to recall that GuzziDiag can now read the single throttle body ECU and at least pull any codes. As a last resort (and I really mean LAST) you could pull the ECU and send it to a REXXER dealer for a re-flash. I think they can read any error codes too.Peter Y.
Single throttle body , same ignition map for both cylinders , and no changes from stock , correct ? Dusty
It's definitely burning fuel in the cat. The stuttering under acceleration will be it not firing every power stroke and then the u burnt mixture will be being pushed out and burning in the cat. It needs fixing.My first guess would be plug, cap or HT lead. Make sure the HT lead is sitting firmly in both the coil and the cap is screwed on tight. Chuck a new plug in that side. If it's still hesitating under load we'll need to dig further.Pete
What was awesome for me was the tech went straight to the plug cap and checked it and it was loose. No head scratching, no looking at a manual or hooking up diagnostics. I am blessed with a great dealership with an excellent service department. Now if Luigi would get off his ass and send a new casting for the back of the transmission, all will be good with the bike.
Phil, it's obvious to people comfortable with engines and how they work and the ins and outs of *modern* technology like catalytic converters. Not everyone has these skills. That's why they go to a shop! It may well be obvious to us, it's hubris to think that everyone should share our skill set.Pete
We have had two V7 that exhibited what your bike was doing right out of the crate. On both the problem was ECM related. They replaced the ECM on both units. Right now Guzzi has the ability to rewrite the stock map through PADS so replacement should not be needed. I hope the tech hooked up to pads and verified everything is OK. Has he ordered the new exhaust? If service has been done on the bike in the past Guzzi will not be buying you a exhaust and look to the last person that pulled the plugs and failed to secure the cap.
Experience and the ability to go to the heart of the problem with minimal clues IS a rare thing. We see it here consistently with a small handful of good brains, but both here and in the world those brains are few and far between. On a site like this one where those few are so willing and prompt with ''obvious" answers that aren't so obvious to the guy asking the question, we start taking it for granted. If those folks were to stop helping, we'd quickly see how few and precious they are.