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« Last post by guzzisteve on January 05, 2026, 09:36:40 PM »
NRV - I'm guessing this is NON RETURN VALVE
I've had many bikes with 36, 38 and 40mm Dellortos and haven't had an issue with the pumps. Then again, I haven't checked for squirt, but if the bike runs as it should, why should I check?
It's good to know what to look for in case I ever do run into that problem.
I haven't had to pull the pumps, but had no idea there was also a gasket along with the diaphram. Where would it go - which side of the diaphram? Is it necessary, especially considering it's not on the parts diagrams?
The gasket is separate, does not usually come w/diaphragm. The gasket goes on the carb body side. It also is not in many of the parts books or diagrams In different manufactured bikes not only Guzzi's but Ducati's too. I know of it cause I sold DelOrto carbs & parts to customers that wanted a hotrod Guzzi. It is in all of the DelOrto parts books though. I had to look up what NRV was also.
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« Last post by guzzisteve on January 05, 2026, 09:12:38 PM »
Looks like a nice one w/o seeing it in person.
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« Last post by leafman60 on January 05, 2026, 08:58:34 PM »
Yes
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« Last post by michaell32 on January 05, 2026, 06:38:40 PM »
Coming from a mechanic background, to me unreliable means a part fails significantly more than any of it's competitors. To date none of my vehicles have left me stranded but I have had issues. The only motorcycle issue I have had was my 2004 R1. It would randomly cut out and only idle. The power would return after a few minutes and I could get home but I didn't trust it. Yamaha later had a recall on the TPS and it didn't happen again however I sold it because I didn't want to take the chance of it returning while I was leaned over.
When it comes to cars/trucks though there are several examples that stand out. Ford 5.4 where the spark plug would shoot out of the head or the threads would come out with the plug. I eventually refused to change plugs on those motors. The later ones would break the plug off in the head. Those were the only motors that I dealt with that had spark plug issues.
Early 4T65E and 4L60E transmissions. Ive lost count of how many I have replaced of each but it was over 50. Nissan CVT as well particularly in the Altima seemed to come up just as often. The last time I went to the Nissan dealership to pick up parts they had one in the bay with 6 miles getting a new transmission.
Chevy silverado and express fuel pumps were by far the most common fuel pump to replace. The DOD lifters on the Silverado were also a common occurrence. Every once in a while a charger/challenger that had the hemi would come in for the same problem. The lifter wore into the camshaft. Most people wanted a cam kit to delete the DOD and dodge equivalent.
I happily left the trade over 10 years ago but I remember a common pattern. Fanatics of the brand would blame the owners even though the owners didn't have these problems with any other make or model. Fanatics of the other brands would jump on the opportunity to share the story and make it look worse than really was. As bad as these examples are, my grandfather told me they don't make them like they used to and thats a good thing. Ive owned sever vehicles with over 300k miles on the original powertrain and the oldest one was a 1995.
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« Last post by Bulldog9 on January 05, 2026, 05:55:37 PM »
Photos of Yamaha how much are you asking?
I'll send you a PM
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« Last post by Bulldog9 on January 05, 2026, 05:54:18 PM »
After reding it all, I think it comes down to…
1. How often are you going to need and use the extra grunt of the 4v above 5,000 rpm?
2. Do you need the improved fairing on the 4v?
3. How often will you turn around and look at the 4v as you walk away compared to your red 4v?
You mean the 4V or 8V? It says it right on the body that it is an 8V not 4V   Oh, and the answer is YES.......... To all of the above as well as an improved suspension, and side case sealing. Truth be told, I like the character of the 4V lumps in my Griso and 1200 Sport, but I do appreciate the extra oomph in the upper revs when loaded and touring. It makes the others feel slow when you really run the motor out on the 8V
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« Last post by drdwb on January 05, 2026, 05:47:38 PM »
After reding it all, I think it comes down to…
1. How often are you going to need and use the extra grunt of the 4v above 5,000 rpm?
2. Do you need the improved fairing on the 4v?
3. How often will you turn around and look at the 4v as you walk away compared to your red 4v?
Point #3 old guy perspective, with the much extended fuel range of the Norge over my Californias, I often have to leave the Norge without a look back. The bladder urgency frequently supersedes the need for a momentary awestruck Wow moment. Just have to make sure the kick stand is down and key is in my pocket. It’s there for the beholding on my relieved return.
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« Last post by Tkelly on January 05, 2026, 05:44:33 PM »
Photos of Yamaha how much are you asking?
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« Last post by Bulldog9 on January 05, 2026, 05:35:56 PM »
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« Last post by Bulldog9 on January 05, 2026, 05:29:34 PM »
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