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This is a common issue as you have found out. Here is a short tech article from Moto Internationalhttp://www.motointernational.com/service/tech-update-all-single-throttle-body-moto-guzzi-v7-models
Cats are in the pipes. Most likely badly damaged by the fuel combusting in them.Pete
The same thing happened to me two weeks ago. My V7 Stone is not under warranty anymore and only has about 4Kms on it. I replaced the plugs and plug covers using the parts listed in the Moto International article. With some help from this forum, the installation was pretty painless too.I haven't gotten around to replace the mufflers yet. Luckily, I found a low mileage pair available on ebay. They arrived late last week. Replacing the mufflers would have cost me a pretty penny had I needed to buy new ones.The bike is running fine now... (I am crossing my fingers).Cheers,Mike
Only an issue with some V7's Why? Because they are built down to the lowest price possible and rather than using NGK caps like they used to they now use some sort of bogan 'No-Name' cap that probably saves them a few cents a bike. Then it all goes udders skywards and they have to have a 'Technical Update' which is the recall you have when you don't want to admit you're having a recall and can therefore avoid the legal ramifications of one. It's the Piaggio way. Isn't it grand?Actually it has been an issue with the 1200's as well but not as bad, their caps don't just fall to bits like the V7 ones. They only fail if you butcher them taking them off the plugs but its very easy to do and could be easily avoided by using a better cap.Pete
....Dealer replaced spark plugs and one O2 sensor, and pulled a set of "new and improved" plug wires from a new V7II and put them on my bike....