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My first week with my 1998 V11 EV

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aaron.hudacky View Drop Down
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    Posted: 22 Aug 2017 at 05:27
On August 8th, I bought my first Moto Guzzi, a 1998 V11 EV with about 26,800 miles.  It had variable idle from rough to stalling and a bad stumble from about 3500 rpm on, but even with the stumble, I really liked riding it, so I bought it from the original owner.  I don't think anything major is wrong and I figured fixing it will be a good learning experience.  

First, I checked and fixed any cracked vacuum lines I could find.  The intake boots are cracked and I've ordered replacements for both sides, but I'm still waiting on the ones closest to the cylinder head to arrive.  I checked the valves and set them at .004" intake and .006" exhaust, although they weren't far off to start with.  To reduce future electrical system frustration, I applied Caig DeOxit to the relays and installed a new battery.  For the stumble, I replaced the air temperature sensor, TPS, and have run two containers of injection cleaner through the tank.  The TPS made the largest improvement.  I bought the PF3C from CA Cycleworks for about $90, which was much better then the almost $400 OEM part, and set it at 150mv with the left TB completely closed IAW the Guzzi manual and BradTheBikerBoy's write up.  Intake boots for both ends of the TBs are on the way.  Once I have both sets, I will remove the tank and replace the air filter, fuel filter, install the intake boots, and look for any other possible vacuum leaks.  I changed the oil (no fiilter change yet) with Mobil1 20W50, but have ordered Agip 10W60 to use when I change the oil filter. 

The stumble is almost completely gone and the engine idles very nicely now at about 1000-1100 rpm, but there is still a slight stumble from about 4000-5200 rpm under throttle openings of about 60% or more.  By the mid-5k range, it is running normally again, and the motorcycle will cruise smoothly up to 80, which is the fastest I've gone with it.  If throttle openings are less than 50%, the engine is smooth all the way through 6,000 rpm.  I've been digging around here and elsewhere, and it sounds like it might be a fuel pressure regulator issue based on the bad mileage (20 mpg before the tps and plugs, high 20's after plugs, waiting to refuel to check mileage after TPS) and smell of fuel after shutting the engine off.  I've ordered a PC connector so I can check everything more throughly with guzzidiag, and I am hoping elimination of any vacuum leaks will eliminate the majority of the remaining stumble.

This weekend I plan to change the final drive and transmission oil and flush the brake system.

Even with a few problems, I really like riding this thing.  The feel, sound and handling are great, and I am amazed how affordable these motorcycles are right now.    

Once I replace the mirrors and turn signals and do some more polishing, I'll post some before and after photos. 

As I do more I will post it here, and if anyone has any advice, it will be greatly appreciated.   
1998 Moto Guzzi V11 EV, 2008 KTM Superduke R
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Tarquin View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Tarquin Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug 2017 at 06:49
Hi Aaron, good work.

One other thing that I would do is order and install a full set of replacement relays from this Guy. http://dpguzzi.com/

The originals are a known weak spot as they age and can definitely cause issues.

The ones from Pyro Dan are very good quality and even for us in the GB, they still work out cheaper including delivery than buying replacements here.



Edited by Tarquin - 22 Aug 2017 at 08:18
California 111,California 1100i,Suzuki FZ50, Yamaha YB100, NSU Quickly,


“Never argue with an idiot. They will only bring you down to their level and beat you with experience.”
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aaron.hudacky View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote aaron.hudacky Quote  Post ReplyReply Direct Link To This Post Posted: 22 Aug 2017 at 07:58
Tarquin,

Thank you for the link. I will take your advice and replace the originals. There are no electrical gremlins yet, but it sounds like the original relays are a common source of aggravation.
1998 Moto Guzzi V11 EV, 2008 KTM Superduke R
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