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Author Topic: Post up your gas mileage, please  (Read 8733 times)

GrimReaper

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Re: Post up your gas mileage, please
« Reply #15 on: May 13, 2010, 02:15:31 PM »
 When I ride with 75 mph I get 40+,but if I keep it under 65 mph I get 50+.This is a lot better than my R1100S,but hey who ride S under 85 :D
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Offline suecanada

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Re: Post up your gas mileage, please
« Reply #16 on: May 20, 2010, 07:21:22 PM »
Crossrodes and I are alike...55 - 62 MPG IMP.
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1983 R65LS - LRB still my favourite!? 1988 Honda NX250, "Toodles Too" and a Suzuki DR650, "Calypso." All stored in the "Brrrmmm Closet".

Patrick_Krivacka

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Re: Post up your gas mileage, please
« Reply #17 on: May 21, 2010, 11:52:31 AM »
Sue, and everyone else who gets 50+mpg, can you give some insight as to why your mileage is so good? Most have indicated that how fast they ride plays a part, but is there some mechanical reason?
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Offline Bob_Roller

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Re: Post up your gas mileage, please
« Reply #18 on: May 21, 2010, 11:53:56 AM »
Sue is stating her mileage, in Imperial gallons, not US gallon .

An Imperial gallon is around 4.55 liters, a US gallon is around 3.83 liters .

Depends on what jets are used as well .

My'81 R65 has 145 main jets, the '84 LS has 138 main jets .
« Last Edit: May 21, 2010, 12:00:28 PM by Bob_Roller »
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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Patrick_Krivacka

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Re: Post up your gas mileage, please
« Reply #19 on: May 21, 2010, 02:05:43 PM »
Bob, could you talk (write) a little bit about jet sizes? I assume (uh oh) that the smaller jet let's in less gas, there fore increases your gas mileage but decreases power? How low can you go? And what Mpg would you expect from it? I really love my r65 (in spite of it's frankenbeemerness) but I was hopein' for a little better mpg.
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Offline Bob_Roller

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Re: Post up your gas mileage, please
« Reply #20 on: May 21, 2010, 02:43:12 PM »
My '81 came with 145 main jets, starting with the '82 model year bikes, they switched to a 138 main jet .

There is a correction chart in the Bing manual, to compensate for higher elevation, and differences in air temperature .

I'll have to check the manual when I get home from work, but I think the bikes were set up for sea level elevation, and 50 F. temperature .

You are correct, the smaller the numerical value of the jet, the less fuel it will flow .

If you can get the numbers off of the carbs, it's stamped into a vertical flange at the front of the carb, I can get you what the carbs were set up for at the factory .

Should read something like : 64/32/325 .

Then you can check the jets that are installed in your carbs to see if a previous owner has messed with them .
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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Patrick_Krivacka

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Re: Post up your gas mileage, please
« Reply #21 on: May 21, 2010, 02:59:35 PM »
thanks Bob. I'll get back to you with that info.
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Patrick_Krivacka

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Re: Post up your gas mileage, please
« Reply #22 on: May 22, 2010, 07:20:58 AM »
the number on the flange is---64/32/304
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Offline Bob_Roller

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Re: Post up your gas mileage, please
« Reply #23 on: May 22, 2010, 08:23:58 AM »
I'm at work now, so it will be this evening before I can get you the numbers .
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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Mike V

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  • 78 R100/7 , 81 R65
Re: Post up your gas mileage, please
« Reply #24 on: May 22, 2010, 06:03:07 PM »
+45mpg today on a newly rebuilt top end and completely restored bike - 200 mile trip through Julian, Ramona, Lake Henshaw, Cuyamaca and over the Lagunas.  Very strong winds today and pushing the bike at a pretty hard pace. I LOVE this bike.  Carves like a snow ski and handles so incredibly well - and the brakes have surpassed my wildest imagination.

What a treat this bike is, life is good!  Didn't want to stop today.
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Mike V. / San Diego
'78 R100/7 (original owner)
'81 R65 (fully restored)

Offline Bob_Roller

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Re: Post up your gas mileage, please
« Reply #25 on: May 22, 2010, 06:04:03 PM »
The table in the Bing manual, shows that your carbs were originally intended for an R80, not an R65 .

I'm assuming your other carb has the numbers : 64/32/306 on it .

The main jet size is 145 .

The needle position is not correct for an R65, it shows that the carb had the needle set to position 4, the R65 normally uses position 3, this is numbered with  the highest position being number 1  .

The manual also shows that the bikes are set up for sea level elevation, and 60 F. (15C) .
« Last Edit: May 22, 2010, 06:19:23 PM by Bob_Roller »
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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Mike V

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  • 78 R100/7 , 81 R65
Re: Post up your gas mileage, please
« Reply #26 on: May 22, 2010, 06:47:28 PM »
Here's one for you Bob, I have the 64/32/325&326 Bings. I've been experiencing horrible flat spots in the low and mid range. I've tried enrichening the mixture screw to the rich end while maintaining a smooth idle. The bike ran fabulous at 3,000 and 4,000 feet in elevation today.  But down by sea level it feels lean. In fact I was running the choke at 1/2 detent position at sea level and it responded better. I'm currently running the metering rods at the #3 position per the Bing manual. I'm thinking it could go to #4 by what it's telling me on today's extended ride. Another tid-bit is the Bing manual calls for a static idle mixture setting to be at 1/2 turn. Won't run there at all. I'm at about 1-1/2 turns currently. I'm thinking lifting the rod will solve some of the problems I'm dealing with. Anyone else experiencing any of the same?
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Mike V. / San Diego
'78 R100/7 (original owner)
'81 R65 (fully restored)

Patrick_Krivacka

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Re: Post up your gas mileage, please
« Reply #27 on: May 22, 2010, 07:05:36 PM »
r80? will the surprises never cease with this bike? what are the implications of this discovery?
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Offline Bob_Roller

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Re: Post up your gas mileage, please
« Reply #28 on: May 22, 2010, 07:15:29 PM »
With the needle set to position 4,  it's running a lot richer than it needs to be for an R65 .

And that's if the needle is set to position 4, in your case it's an unknown, until you check it yourself .

After hearing the other odd things you've found on your bike, who knows what size main jets you have currently installed .
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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Bob_Roller

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Re: Post up your gas mileage, please
« Reply #29 on: May 22, 2010, 07:17:42 PM »
Mike, I have the same carbs on my bike, I have not experienced a flat spot .

What main jets are you using the 145's ?
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'81 R65
'82 R65 LS
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!
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