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ralboz
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I Love YaBB 2!

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Location: North Wales, UK
Joined: 10/13/18
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10/17/18 at 17:24:10
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Hi , i have recently purchased my first BMW . An elderly neighbour asked if i wanted to buy a motorcycle ,i politely informed him that i,ve got 5 already and i,m on thin ice with the good lady as it is . But curiosity of course got the better of me and fast forward a week i,m stood in his shed looking a dusty r65 thats done 500 miles in the last 10 years . The mileage on the speedo shows 50k miles but he thinks the speedo may had been changed at some point . Anyway we had a stand off over price for a day or two and its now in my garage . After a few days of servicing , fresh oils , valve clearances ,points and plugs cleaning it running ok and i did 100 miles on it today and i must confess i enjoyed it ALOT . The hot idle hangs up sometimes at 3k so i,ll have a look at advance unit and carb slides .

Thanks for adding me to the forum

Kind regards Ralph    
North Wales UK
  
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wilcom
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Location: Menifee, Ca.
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Reply #1 - 10/17/18 at 17:50:34
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Nice looking bike, Ralph.  What year is it? I see square MC,  dual disc, clam shell air cleaner and flat top carbs.
  

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

Present:
1984 BMW R65LS "Herr Head"
past:
1979  R65   
1980  R65          
1982 R80RT 
1974 R90/6     
1972  R75        
1964 R50
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Adrian
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The Old Hairy Biker Sez...

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Location: South Australia
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Re: new member
Reply #2 - 10/17/18 at 20:35:59
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Hi mate all the way from South Oz - nice looking bike - welcome to the tribe - I hope you enjoy your new bike 🏍️👍👌
  

1984 R65 (860)
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Tony Smith
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Re: new member
Reply #3 - 10/17/18 at 20:47:33
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wilcom wrote on 10/17/18 at 17:50:34:
  What year is it? I see square MC,  dual disc, clam shell air cleaner and flat top carbs.


The ATE calipers, flat top Bings, clamshell air cleaner and short duck tail mark this one as a 79~80 model.

To the OP - lovely bike and welcome.  If unmolested your bike has the small valves and non-hardened valve seats which means it may be prone to valve seat recession. If so the fix will onl;y cost a few diolalrs more to upgrade to the larger valves and unleaded tolerant seats which will give you a "free" 5hp. Alternatively a set of later model heads which already have the bigger valves and unleaded seats might be an alternative (post 1985 heads are the "Gold" standard but you need to get the rocker gear specific to that model.

I don't know what your level of BMW knowledge is, but I not that you changed the oil filter. If you didn't check the canister depth and calculate the correct combination of shims/gasket, then perhaps you should do so as loss of oil pressure is bad.

Next, given the time this bike has been standing you will want to do a gearbox spline lube, while you are there you can check the clutch. You  should know that the "heavy flywheel" version of the R65 uses a pressure plate and clutch plate unique to that model.

Unless someone has been there before you, your bike will have the now rare "points in a can" ignition trigger. Contrary to modern thinking I would not rush out and buy a Boyer ignition kit for it - as I get older I yearn for the simplicity and reliability of points.

On the subject of ignition, once you have the "hot idle" problem sorted (in my experience almost always sticking advance/retard due to either lubrication failure or stretched/broken advance retard springs) Its time to check the timing. If you have a blurred or double image of timing mark when using your timign strobe you are goign to be at a minimum replacing the timing chain, but given thhe age and potential miles of the bike, likely the chain, crankshaft sprocket and (possibly) the cam sprocket. If you need to change the crank sprocket yoou will need to hire/borrow soem specialist (not special) tools - it is a time consuming job, but well within the capabilities of a home mechanic.

Lastly, when the rocker coveres are off, see how much "rock" there is in the valve guides - your model is somewhat more prone to other BMWs to the dreaded dropped valve and around 50K miles is well into the territory when it is likely to happen. The guides can be replaced, or far more cheaply k-lined which in my experience is just as durable, and best of all, wwhen they do wear the k-lines can be wound out and new ones fitted.

I'll leave others to discuss the joys of the final drive, but I will say that evenn if youy have to do everything I've mentioned above, the cost will be returned to you in decades of trouble free riding.

  

1978 R100RS| 1984 R65 | 1992 KLE500 | 2002 R1150GSA
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ralboz
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I Love YaBB 2!

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Location: North Wales, UK
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Re: new member
Reply #4 - 10/18/18 at 01:56:15
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Thanks folks for the welcomes . From what i,ve learned about the bike it seems pretty well cared for in it's past life . What i know is it was first registered in early 80 so probably a 79 series 1 . The old gent up the road had changed the cam chain and clutch during his watch . It arrived into his hands painted yellow so he sprayed it red .
     When i adjusted the valves the exhaust valves showed signs of seat regression , one side was down to .002" the other .005" but i,ve no datum as to time scale but will check again in 500 miles and plan a hard seat conversion in the worst of winter .
      As for the oil filter , i heard that this can be problematic if you don't have the knowledge ( i don't ) so i just changed to oil this time around . i changed to the battery yesterday wow thats a big battery .
      My motorcycle background is Triumphs old and new , the odd Harley and lots of older Japanesse stuff 4 and 2 stroke . My current line up is the BM ,Honda 1989 cbr1000f ,1979 yamaha xs400 ,Triumph sprint 1050 and last and possibly lease a 1976 MZ TS250 .

Thanks again for the welcome .

Kind Regards Ralph
  
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tiggum
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Reply #5 - 10/18/18 at 13:20:50
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Just changing the oil this time is probably a good idea; you need to get one of the guys on here to send you a piece on the procedure to change the oil filter safely.  Or find a BMW mechanic to get it done next time and let him teach you the procedure, while you watch, take notes and maybe even photos.  There's a safe way, and then there's an expensive way, which you do not want to do.
  
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