2013 Stelvio catastrophic engine failure

[NewWorldSamurai]

Hello  WG Chasers.
I recently purchased a second-hand 2013 Stelvio with 9000 miles on it. Before purchase, I inspected the bike and it had roller tappets. It ran a little rough from the get go and required an exhaust leak repair and new muffler when I first purchased it. A basic 6000K service was performed and fuel changed to that fancy, no-ethanol high octane. Still the bike did not operate perfectly. At about 5900 rpm's the power would bog down. After deep blog digging, I believe the cam timing was off.

Anyways, one dark night this autumn my bike experienced catastrophic engine failure. I was traveling about 70mph and twisted the grip to accelerate and get into the right line. When I did this this, there was a terrible gnashing sound accompanied with an extreme loss of power and lots of smoke.

After a cursory post-mortem, I have  large chunks of aluminum in the oil sump. Also the right front valves seats are chewed up and the valves are bent. At the least, I believe it needs a new cylinder block, but after my initial finds I stopped the tear-down (I'm in a shared garage with limited space). I reckon there is a lot more damage.

Currently, I am weighing my options. Do I seek out a complete new engine replacement, and if so, where? Is there anyone near the Puget Sound that is capable and willing to take on a project like this? Or do I strip the bike and piece it out on the internet with hopes of recovering some of my investment?

Advice, guidance and wisdom is appreciated, wise-cracks are expected!
Thanks-
NewWorldSamurai

[Ryan]

First, I am sorry for your loss. Now let's get down to business. It is all about dollars and desire. What you have already invested is irrelevant. People spend way more money trying to "recoup their investment" than just junking it and buying another. Find out what a replacement engine or a used engine will cost, add 10% to the quote and decide if you would pay that much for a bike just like yours with a new/running engine.  If the answer is yes, then have the work done and enjoy your new bike. If the answer is no, call a couple of bike wrecking yards and get bids. You do not have the space to work on a bike, so you do not have the space to strip one down and store the parts for weeks or months until they sell.  Get rid of what's left and find a new bike.

[GonzoB]

Ryan, what a breath of fresh air! Excellent advice.

Gonzo

[oldbike54]

 Bump

 Dusty

[gearman]

Bump also.Sorry

[SemperVee]

Since you are in the PNW here I would call Optimum performance - MG mechanic/dealer >>>>  https://opmotorsports.com/ in Kirkland for their input.
   

(425) 765-3691 | info@opmotorsports.com

[Bulldog9]

That stinks, so sorry.  My guess is that one of the cams were out of timing. I bought a Norge back in 2015 with a similar rev issue, wouldn't rev past 5900-6K. After all kinds of checks and upgrades, plug ends, reflashing map, beetle map, swapping coils, TB balance, etc etc, the bike was running better, but still bogged at 6K revs. Pete talked about a similar issue on a bike that was incorrectly reassembled after a roller update, and I asked the tech at MI to check. Sure enough the intake cam on right cyl was off one tooth in timing (retarded). I'm sure if we hadn't caught it, the same would have happened. Sounds like your exhaust cam was off on timing.

Cant help with what to do next, and what is best other than to look for a wrecked bike to salvage the motor, though others will weigh in. Good luck!

[fotoguzzi]

$2600. For used NTX motor
https://www.ebay.com/itm/12-Moto-Guzzi-Stelvio-NTX-1200-engine-motor/312227240584?hash=item48b2319a88:g:kMMAAOSwOUJbhcqq

[MotoG5]

When I sold my 12' (Rollered) NTX last summer used units were going for $4500 to $5500 for the most part. Some 15' or 16' with low miles for a bit more. I think you would be far better off just replacing it. Not sure about how to deal with selling the failed bike. Maybe someone here might have some ideas on that. Sorry to here about this kind of bad luck.

[Huzo]

Who ended up with that crashed Stelvio a couple of years back that the guy was giving away..?
Might be worth chasing him up.