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Author Topic: R65 CPR  (Read 1904 times)

Offline BooG

  • Lives in Foothills of Mt. Olympus
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R65 CPR
« on: July 03, 2018, 11:40:00 AM »
Good afternoon.
I had some time off recently, so my attempts to revive the R65 have begun. There is a new dyna coil, rebuilt carbs, rebuilt bean can, new points n plugs and some fresh gas. The tank isn't on yet, but i filled the float bowels for turn over. New battery.
Turned over very eagerly...some chuffing and banging. It didn't actually run, but I think it will. Both header pipes were hot to touch, although the right seemed hotter than the left. I think I should set static timing...which leads me to....how do I do that then?
As far as I know so far...you get the S mark in the observation hole, but what else should I do at this stage before I turn over again?
Love working on the airhead again!!
BMW R65 1980.
Vespa Sprint Veloce 1971
BMW K75S 1987



Offline Barry

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Re: R65 CPR
« Reply #1 on: July 03, 2018, 04:18:46 PM »
I disconnect the black wire at the bean can and use an ohm meter or for preference an electrical buzzer between the spade connection and earth (across the points).    Some people say they jog the engine around using the rear wheel but I haven't the fainest idea how it's possible to do that with any accuracy. I use an Allen key in the rotor bolt with the plugs out.  The points should open just as the S mark lines up with the notch in the window.  I then rotate one revolution to check the other lobe on the points cam.



Barry Cheshire, England 79 R45

Offline mrclubike

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Re: R65 CPR
« Reply #2 on: July 03, 2018, 06:20:17 PM »
I have drilled a hole in the front cover to access the bolt to turn the motor over
Very handy   also  when adjusting the valves 
1982 R65 running tubeless Snowflakes
2004 R1150R

Offline wilcom

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Re: R65 CPR
« Reply #3 on: July 03, 2018, 09:42:40 PM »
Quote
I have drilled a hole in the front cover 

Very clever Sir
Joe Wilkerson
Telephone man with a splash of Data
Menifee, CA

Present:
1984 BMW R65LS "Herr Head"
past:
1982 BMW R65LS
1979 R65
1980 R65
1982 R80RT
1974 R90/6
1972 R75
1964 R50/2
19xx R27
ZX-11

Offline BooG

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Re: R65 CPR
« Reply #4 on: July 05, 2018, 04:59:53 AM »
Cough...splutter....ignition....pinking....cough...splutter.....there is life there......why won't she kick in...!! It wants to go...points set/both pipes are hot to touch, so there is ignition...but won't run to idle.
What else should I be doing?
BMW R65 1980.
Vespa Sprint Veloce 1971
BMW K75S 1987



Offline mrclubike

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Re: R65 CPR
« Reply #5 on: July 05, 2018, 08:06:46 PM »
Weak spark
1982 R65 running tubeless Snowflakes
2004 R1150R

Offline BooG

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Re: R65 CPR
« Reply #6 on: July 06, 2018, 06:11:04 AM »
Possibly...so that's why I replaced the coils with the Dyna, new plugs went in and new points. I'll look again at the spark....big, fat and blue yeah? :o
BMW R65 1980.
Vespa Sprint Veloce 1971
BMW K75S 1987



Offline BooG

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Re: R65 CPR
« Reply #7 on: July 06, 2018, 06:19:06 AM »
It certainly looks the part..nice and blue (viewed in the dark). There is a new condenser on the bean can; I say new, but that was 8 years ago. What would be the symptoms of a failing condenser?
BMW R65 1980.
Vespa Sprint Veloce 1971
BMW K75S 1987



Offline BooG

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Re: R65 CPR
« Reply #8 on: July 06, 2018, 06:58:26 AM »
Could it be the "new Dyna coil" after all? It's the green one.
Spark looks good though.....head scratch.....
BMW R65 1980.
Vespa Sprint Veloce 1971
BMW K75S 1987



Offline BooG

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Re: R65 CPR
« Reply #9 on: July 06, 2018, 07:01:21 AM »
PS: I would put a rubber in your hole to stop water/dust debris etc.....please don't take that the wrong way!
BMW R65 1980.
Vespa Sprint Veloce 1971
BMW K75S 1987



Offline tunnelrider

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Re: R65 CPR
« Reply #10 on: July 06, 2018, 04:18:08 PM »
If you're observing good spark I'd say the ignition is working ok.
I would next check for correct valve lash and that there is the correct amount of fuel in the float bowls.  Set the idle mix screw each side at 3/4 turn out from light seating and the throttle stop screws 1 full turn on from where they start touching the butterfly valve.
I'd also check that the choke is working, it makes starting a lot easier.
You've probably done all this already, just my 2p worth.  If all these check out it should really be starting ok.  The only thing left is the air intake, or revisiting the carb rebuild.
Green Dyna is the correct one for points.

Pretty sure I can spot a rubber timing hole bung in Mrclubike's 'front hole'.
'85 Black R65 / '74 GT185 / '83 Pantah 500 / '01 DRZ400 dirt only

Offline mrclubike

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Re: R65 CPR
« Reply #11 on: July 06, 2018, 08:41:52 PM »
Quote
PS: I would put a rubber in your hole to stop water/dust debris etc.....please don't take that the wrong way!

It is Plugged with a timing hole plug  ;D
1982 R65 running tubeless Snowflakes
2004 R1150R

Offline Tony Smith

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Re: R65 CPR
« Reply #12 on: July 07, 2018, 01:21:47 AM »
I'd reckon a good candidate for non start with good spark is clogged start enriching jets (they are in the float bowls). To test for this buy an aerosol can of starting fluid (in Australia "Start Ya Bastard" outsells all other brands in spite of the contents being identical and a slightly higher price, buggered if I know why :-).

Anyway, see f you can get it running on starter fluid and if you come back several times during the course of the day and it starts fine, but will not start the next day, book yourself in for a carb refresh, but clean those pesky starting jets first and see what happens. BTW, contrary to any other jet you might handle, you do not need to be too gentle with these, they do after all only come into play when the choke ;ever is operated - clean them with oxy set jet files. If your bike sudden;y starts properly, order a complete carb rebuild kit and have at it.
1978 R100RS| 1981 R100RS (JPS) | 1984 R65 | 1992 KLE500 | 2002 R1150GSA |

Offline BooG

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Re: R65 CPR
« Reply #13 on: July 20, 2018, 12:03:18 PM »
Well....half way between running and not running! Gave it some serious cranking, and for a few seconds it ran unaided..but then chuffed out. Did this a few times, but just wouldn't keep going. Def wants to go as far as the ignition goes. Both sides firing and blowing. Fuel is getting through...enrichener circuit? Could be.
Battery is charging again now...and the elderly lady opposite is recovering from the disturbance!?
I'm feeling positive though.....
A strange occurrence: the bike is on an optimiser. When I came to it today, there was no signs of any lights anywhere. Turned over fine. Oil pressure light, neutral light and charging light all operating, but nothing else.
Fuses looked OK. Gave the relays a tap, but nothing. Strange....
BMW R65 1980.
Vespa Sprint Veloce 1971
BMW K75S 1987