Author Topic: 850T weight, dry vs wet? (Read 2776 times)

Testarossa · « **on:** August 20, 2019, 09:43:42 AM »

I posted this in my 850T rebuild thread and no one responded. I'm genuinely curious so reposting:

I weighed the T at 480 lb with oil but no fuel. Can't vouch for the accuracy of my scales.

Book value is 465 dry, 562 full fuel. That's a 97 lb difference. Really? 5.5 US gallons of gasoline should weigh only 34 lb, and 5 qt of oil (split sump, gearbox, final drive) should weigh less than 9 lb. That still leaves 55 lb unaccounted for.

The only thing I can think of to explain the difference is that "dry" must not include a 55 lb Marelli car battery. My weighed dry weight includes oil and a 16-lb Yuasa battery -- and the fairing and the LEO sidestand which is probably two pounds heavier than the original. Take those out and I'm very close to the nominal 465 lb dry weight.

So the question is: How did Guzzi report dry weight back in the day? With or without battery? What does your old Tonti weigh compared to the values in the spec sheet?

Antietam Classic Cycle · « **Reply #1 on:** August 20, 2019, 10:51:16 AM »

Even an ETX30L AGM (about the largest and heaviest that will fit) is only 24 lbs.

chuck peterson · « **Reply #2 on:** August 20, 2019, 03:41:35 PM »

I count one gallon as 8 lbs, just like water if I remember. 6 gallon tank full adds 48lbs, so there might be another 14lbs closer to your wet weight figure

Two Checks · « **Reply #3 on:** August 20, 2019, 03:50:53 PM »

Gasoline is just over 6 lb. Water is over 8.

Chuck in Indiana · « **Reply #4 on:** August 20, 2019, 04:08:24 PM »

Quote from: Perazzimx14 on August 20, 2019, 03:06:01 PM

Guzzi reported dry weight just like HP. They picked a number and posted it as technical data.

I'd say that pretty much nails it.

Turin · « **Reply #5 on:** August 20, 2019, 04:54:37 PM »

Did you figure deducting the fork oil?

I suspect guzzi weighed their bikes by throwing a pile of parts on Luigis bathroom scale.

Chuck in Indiana · « **Reply #6 on:** August 20, 2019, 05:02:06 PM »

All big blocks weigh 550.

Luigi threw a dart, and that's where it landed.
Just for S&G, I weighed the Mighty Scura, AeroLario, and Monza when I had some aircraft scales in the hanger doing a weight and balance on an airplane. Surprisingly, to me.. the Scura weighed 495 without fuel but otherwise ready to run, so add roughly 36 lbs of fuel, and it'll beat that 550 number. A little. After all, Guzzis are all about lightness..

geodoc · « **Reply #7 on:** August 20, 2019, 05:12:24 PM »

Bought a digital scale that you can hang from a chain hoist. My Loop with full fuel weighs 535 lb. My '73 Ducati 750 GT with full fuel was 472. My 2001 Triumph Sprint RS with full fuel 536 lb. My garage mate Tom's (pictured below) stock 1974 T150 Trident no fuel was 466 lb.

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RinkRat II · « **Reply #8 on:** August 20, 2019, 05:18:24 PM »

It is determined by an exacting logarithmic calculation based on the smoke coming out of their.............. .....wind tunnel

Paul B

canuck750 · « **Reply #9 on:** August 20, 2019, 05:35:28 PM »

Quote from: geodoc on August 20, 2019, 05:12:24 PM

Bought a digital scale that you can hang from a chain hoist. My Loop with full fuel weighs 535 lb. My '73 Ducati 750 GT with full fuel was 472. My 2001 Triumph Sprint RS with full fuel 536 lb. My garage mate Tom's (pictured below) stock 1974 T150 Trident no fuel was 466 lb.

Cool scale, where did you get that George? I have an overhead crane with an electric winch running off it in my shop, that scale would be great for weighing bikes and other things.

I read that 'dry weight' does not include fluid in the battery, no fluid in the forks, no engine oil or coolant, no brake fluid, they probably even drain the rear drive and the fluid in the shocks

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geodoc · « **Reply #10 on:** August 20, 2019, 06:03:46 PM »

Bought it off eBay:

https://tinyurl.com/y6p7x6dw

.

canuck750 · « **Reply #11 on:** August 20, 2019, 09:20:57 PM »

Thanks George

Guido Valvole · « **Reply #12 on:** August 21, 2019, 05:51:05 PM »

Chuck, out of curiosity, what did the Monza weigh?
cr

Chuck in Indiana · « **Reply #13 on:** August 21, 2019, 07:44:50 PM »

Quote from: Guido Valvole on August 21, 2019, 05:51:05 PM

Chuck, out of curiosity, what did the Monza weigh?
cr

Believe it or not.. I didn't write it down, and now I can't say for certain.

It *seems* it was only 25 lbs lighter than the AeroLario, which surprised me because it definitely feels lighter. Failing memory says a little under 400. I'm pretty sure I posted it here, though. I'll do a search.

Guido Valvole · « **Reply #14 on:** August 22, 2019, 01:53:25 PM »

Thanks, Chuck! That sounds about right. Shop manual says 160kg / 353 lbs. Which in the finest Italian tradition would be dry, no fluids of any sort, and helium in the tires...

Chuck in Indiana · « **Reply #15 on:** August 22, 2019, 05:04:37 PM »

Quote from: Guido Valvole on August 22, 2019, 01:53:25 PM

Thanks, Chuck! That sounds about right. Shop manual says 160kg / 353 lbs. Which in the finest Italian tradition would be dry, no fluids of any sort, and helium in the tires...

Oh yeah.. forgot to account for the helium.

motoTommaso · « **Reply #16 on:** August 22, 2019, 06:32:46 PM »

Quote from: Two Checks on August 20, 2019, 03:50:53 PM

Gasoline is just over 6 lb. Water is over 8.

Yes this ^^^ Used it many times for avgas 100LL weight and balance.

frozengoose · « **Reply #17 on:** August 22, 2019, 09:54:22 PM »

Just out of curiosity, I weighed the T when I got back from town after filling up the tank. Used a bathroom scale, so I guess the weights are maybe plus or minus 5 lbs.

Front wheel on scale = 235

Back wheel on scale = 275

So there you go... 510 lbs with a full tank of gas Your results may vary.

Testarossa · « **Reply #18 on:** August 22, 2019, 10:34:37 PM »

That 510 is within 5 lb of my result.

pete roper · « **Reply #19 on:** August 23, 2019, 12:14:54 AM »

My Stelvio is so heavy it pulls small asteroids into orbit around it. If I park it and the Griso together they develop an event horizon and suck everything around them into a deadly vortex!

frozengoose · « **Reply #20 on:** August 23, 2019, 12:36:42 AM »

I was kind of surprised that the T didn't weigh more, it's so heavy to move around the garage, I always figured that T stood for Tank!

pete roper · « **Reply #21 on:** August 23, 2019, 12:45:58 AM »

No, it stands for 'Turd'!

frozengoose · « **Reply #22 on:** August 23, 2019, 01:10:08 AM »

Quote from: pete roper on August 23, 2019, 12:45:58 AM

No, it stands for 'Turd'!

Well like the old philosopher sez, "opinions are like assholes, everybody's got one."

pete roper · « **Reply #23 on:** August 23, 2019, 01:18:40 AM »

I'm very fond of 'T's. If I did decide to get another older Guzzi it would probably be a T3.

frozengoose · « **Reply #24 on:** August 23, 2019, 01:27:17 AM »

It's got it's short comings, for sure, but after thirty years, I still enjoy cruising it down the highway. But the gravel roads around here are a different story, I guess that's why I ride the v65 a lot more now.

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Author Topic: 850T weight, dry vs wet? (Read 2776 times)

canuck750

canuck750

pete roper

pete roper

pete roper