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Author Topic: How much fuel does your bike use?  (Read 6673 times)

Online Bob_Roller

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Re: How much fuel does your bike use?
« Reply #15 on: March 22, 2009, 03:39:32 PM »
While we are on a fuel topic, with the single fuel tap on the R65, there is about .5 gallons ( about 2 liters) of 'unusable' fuel trapped on the right side.

If you can get the front wheel elevated, like resting on a curb, you can coax the remaining fuel over to the left side,by tipping the bike to the left side.
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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 nhmaf

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Re: How much fuel does your bike use?
« Reply #16 on: March 22, 2009, 09:06:25 PM »
Or, if you leave a little bit of 'extra' length in your fuel line from the petcock, you  may be able to slip the tank off the frame enough to tip it to the left without disconnecting it.  It is a close call, and the last time I replaced my fuel line I didn't leave quite enough length
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ambrose78

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Re: How much fuel does your bike use?
« Reply #17 on: March 22, 2009, 10:57:57 PM »
Quote
It wouldn't be a bad idea to go through the carbs, and do a quick change of the rubber parts, along with the needle, and the needle jet.

I 're-built' the carbs on my '81 about 2 years ago, and I found that one of the needles was set to the wrong position ,from the factory.

If you are not the original owner, jet sizes, and needle position may have been changed from the factory specs.
 

I'm trying to obtain all the parts for the carb overhaul and have been successful with most parts ....except for the Jets.

Apparently there is a couple of listed jet specifications for the R65  - 2.64 and 2.66. There are also a whole pile of other sizes available that will fit the carbs but are probably too big or small. I've searched and searched but no joy.

How can one know which is the right one for the r65 bike? Or the merits of choosing one size over the another?
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Online Bob_Roller

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Re: How much fuel does your bike use?
« Reply #18 on: March 22, 2009, 11:11:09 PM »
At the front of the carb, there is a vertical web, and it has numbers stamped into it.

Like 64/32/325 for a left carb, and 64/32/326 for a right carb.

Get those numbers, and I can give you what was installed when the bike came out of the factory.
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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 !!!!!

ambrose78

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Re: How much fuel does your bike use?
« Reply #19 on: March 23, 2009, 08:33:55 PM »
found it

left side   64/ 32/ 307
right side 64/ 32/ 308

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Online Bob_Roller

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Re: How much fuel does your bike use?
« Reply #20 on: March 23, 2009, 08:57:35 PM »
The Bing manual shows a main jet size of 145, needle jet 2.64, jet needle 241, atomizer 591, idle jet 45 .

Needle clip position #4, the top slot is #1.

Hope it helps you find the sizes you need.
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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 !!!!!

ambrose78

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Re: How much fuel does your bike use?
« Reply #21 on: March 23, 2009, 09:00:32 PM »
Champion!

Thanks  :)
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Offline Semper Gumby

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Re: How much fuel does your bike use?
« Reply #22 on: March 23, 2009, 09:07:43 PM »
+1 on the overflow tube.  I ran mine down infront of the LH cylinder.  Simple and safer.   ;)
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Bill Gould ?1980/03 R65 When at first you don't succeed....Moo!

ambrose78

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Re: How much fuel does your bike use?
« Reply #23 on: March 31, 2009, 08:24:14 PM »
Well car rebuild is pretty much done now. So is the tank overflow tube. Now for a carb synchronizing tune.

On a side note, The airbox has a little rubber one way relief valve at the back near the battery.A pic of the little guy is at the bottom of this page.
http://www.gunsmoke.com/motorcycling/r100gs/carb_rebuild/index.html

Mine is pretty much in need of a replacement having gone hard and cracked. I called bmw and they want about A$25 which seems a lot for a little rubber grommet. Does anyone know of a reasonably priced supply?

Or alternatively if would there be a problem just sealing it up with some silicone?

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Online Bob_Roller

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Re: How much fuel does your bike use?
« Reply #24 on: March 31, 2009, 08:32:13 PM »
That 'fish mouth' looking rubber part, is there to drain water, or excess oil from the crankcase ventilation system that gets into the airbox.

As long as you take a look in there on occasion, I think you could plug the orifice with sealant, and not have any problems .

The cost of that part is 3-4 times the cost here in the US !!!!!
« Last Edit: March 31, 2009, 08:40:39 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 !!!!!

ambrose78

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Re: How much fuel does your bike use?
« Reply #25 on: March 31, 2009, 09:32:05 PM »
I thought $25 was waaaaay too much for what is little more and an extended grommet. Particularly as the guy on gunsmoke said it cost him a few cents.

Where is good place to order the fish mouth airbox grommet from in the US?
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Online Bob_Roller

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Re: How much fuel does your bike use?
« Reply #26 on: March 31, 2009, 10:00:46 PM »
I apologize, I got the exchange rate incorrect, the cost in $25AU would be about $15US.

I used the British Pound, instead of the $AU.

Current price in the US is about $12US.
« Last Edit: March 31, 2009, 10:46:25 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 !!!!!

ambrose78

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Re: How much fuel does your bike use?
« Reply #27 on: March 31, 2009, 11:16:59 PM »
Thanks anyway.

In that case I think I'm going to seal it up and periodically check the airbox. If anything goes wrong I can always put one in again in the future.
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Offline montmil

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Re: How much fuel does your bike use?
« Reply #28 on: April 01, 2009, 06:01:03 AM »
If you wish to continue with the rubber vent mechanism, sorta, perhaps a bit of air filter element would work?  Ol' Snowbum chats about this item in his BMW site. IIRC, he states it's a pressure relief or something...

Monte
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Monte Miller
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ambrose78

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Re: How much fuel does your bike use?
« Reply #29 on: April 07, 2009, 03:24:28 AM »
Just got back from a glorious ride up through the Royal National Park (Yay lots of twisties!! Just begging for a good fang :) ) , back along the highway at 110-120kmh with a bit of a trudge through Wollongong stopping at a few shops to get groceries, fuel etc

Initial riding impressions seem to be less throttle needed for a particular speed versus before

Anyway the first result is........ [size=12]5.9l/100 [/size](40mpg US   48mpg UK). Definitely the best yet  :)!  

Thanks again for the input ;)
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