Page Index Toggle Pages: 1 Send TopicPrint
Normal Topic R65 '81 onwards Jet Sizes (Read 167 times)
Julio A.
God Member
*****
Offline



Posts: 507
Location: Metro Manila, Philippines
Joined: 05/13/10
Gender: Male
R65 '81 onwards Jet Sizes
07/01/18 at 06:22:47
Post Tools
Hi Guys, by any chance anybody knows what the original jet sized are for the 81' onwards R65's?

I'm only have been able to see though my internet searching skills, the specs for the 78'-80' R65 Jettings.
AFAIK, these specs run richer than the 81' onwards.
  

Julio Alarcon
1981 R65
1976 R90/6
2001 R1150 GS/ADV
2015 TR650
Back to top
 
IP Logged
 
Barry
God Member
*****
Offline



Posts: 4859
Location: England
Joined: 07/07/08
Gender: Male
Re: R65 '81 onwards Jet Sizes
Reply #1 - 07/01/18 at 07:34:30
Post Tools
Here's a few to choose from:

Original riders handbook
64/32/307 & 8
145
2.64
needle 46-241 in position 4
45

Haynes UK jetting:
64/32/307 & 8
148
2.64
needle 46-241 in position 4
45

Haynes US jetting:
64/32/325 & 6
145
2.66
needle 46-241 in position 3
40

Not sure why the difference in main jet size between BMW handbook and Haynes  but it's very unlikely to be worth worrying about as main jet size changed again in 83 to 138 (UK)  135(US).
  

Barry Cheshire, England 79 R45
Back to top
 
IP Logged
 
georgesgiralt
God Member
*****
Offline


I Love YaBB 2!

Posts: 1154
Location: France
Joined: 10/14/12
Gender: Male
Re: R65 '81 onwards Jet Sizes
Reply #2 - 07/01/18 at 08:06:26
Post Tools
Well, it depends on the market (pollution status, etc) and the installation of the cover of air filter box with asymmetrical trumps.
IMHO, it was far easier for BMW to change jetting to comply with local regulations than to modify the engine further... Loosing a couple of horse power was not a problem....
  
Back to top
 
IP Logged
 
Bob_Roller
Global Moderator
*****
Offline


  GMT -7 Hours

Posts: 8695
Location: Tempe, Aridzona USA
Joined: 11/13/06
Gender: Male
Re: R65 '81 onwards Jet Sizes
Reply #3 - 07/01/18 at 11:01:51
Post Tools
My '81 R65  carb numbers 64/32/325-6 had 145 main jets .
I had an assortment of jet sizes, spare parts from the two other R65's I have .
I installed 138 main jets to see if I could get better fuel economy, no difference in fuel usage, or engine performance .
I don't think the main jet size comes into to play, until you're at high power settings .
I put an index mark on the right hand grip, and corresponding marks, idle, 1/4, 1/2, 3/4 and full throttle on the adjacent switch case .
I'm usually at around half throttle in my normal riding after going through the gears .
  

'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 !!!!!
Back to top
 
IP Logged
 
Julio A.
God Member
*****
Offline



Posts: 507
Location: Metro Manila, Philippines
Joined: 05/13/10
Gender: Male
Re: R65 '81 onwards Jet Sizes
Reply #4 - 07/03/18 at 07:48:36
Post Tools
Thanks for the info Guys.

I'm also curious about putting jets they used on the Mono R65's on earlier models. AFAIK, they put smaller jets on those models right?
  

Julio Alarcon
1981 R65
1976 R90/6
2001 R1150 GS/ADV
2015 TR650
Back to top
 
IP Logged
 
Page Index Toggle Pages: 1
Send TopicPrint