The New And Improved Unofficial R65 Forum V2
Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: thessler on April 16, 2013, 04:41:13 PM
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Just wanted to let you guys know, I completely disassembled the ignition can and cleaned.
I found the bigest problem seemed to be below the plate that the weights ride on it has two washers with a fiber washer between them. I think the whole plate moves with the advance and wasn't really returning with no advance.
they were dry and a little stickey, so everything got cleaned real good and a light film of grease.
Now it returns to idle fine, even when hot. :)
Thanks for the suggestions while trying to sort this out.
Tom
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Congrats Tom! I'll drink to that [smiley=beer.gif]
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[smiley=tekst-toppie.gif]
Well, there you go.
And Tom, you might considered posting the resolution of your high idle issue on the tail end of your first "high idle" posting. That way, readers that search under "high idle" will not be deprieved of the correct and final resolution.
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wish you would have taken a couple of pics
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I've been living with my sometimes high idle for years because I don't feel like doing that. Maybe I'll include it with my new timing chain job, since I'll have to pull the ignition unit for that anyway.
My bike spends very little time idling anyway.
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(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fi196.photobucket.com%2Falbums%2Faa1%2Fmontmil%2FBMW%2520R65%2FAdvanceWeights01_zps281a38d3.jpg&hash=378bc23d321be2e0d62d2da6b451a05a343322f5) (http://s196.photobucket.com/user/montmil/media/BMW%20R65/AdvanceWeights01_zps281a38d3.jpg.html)
Here's an electronic ITU (Ignition Trigger Unit) Bean Can, sans the Can. The Hall sensor is on the right side of the "first floor". The red, green and black wires are encased within a black sheath as they exit the can. Simple.
Downstairs is the Ignition Advance mechanism. Couple fly weights and a pair of springs. This area can be the sticking point of a high idle issue.
(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fi196.photobucket.com%2Falbums%2Faa1%2Fmontmil%2FBMW%2520R65%2FAdvanceWeights02_zps7d6810f1.jpg&hash=4e439dc68f0bf2fbefb855f0457988e3ee14573a) (http://s196.photobucket.com/user/montmil/media/BMW%20R65/AdvanceWeights02_zps7d6810f1.jpg.html)
Note the red rubber bumpers in the small, arched, cut out on the floor. This is the maximum advance movement of the fly weights. Just a few degrees worth is all. Atop the pin is a black, nylon-ish spring perch. The spring has been removed in this photo so compare with the first photo.
That blue-grayish material is Lubriplate grease. Just a little dab'll do ya.
(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fi196.photobucket.com%2Falbums%2Faa1%2Fmontmil%2FBMW%2520R65%2FAdvanceWeights03_zpsc1824f21.jpg&hash=cff979c3355805cf4638cdcb2d14af2cf1ee87b1) (http://s196.photobucket.com/user/montmil/media/BMW%20R65/AdvanceWeights03_zpsc1824f21.jpg.html)
Bare fly weights. The nylon pads should slide freely on the cleaned and lightly lubed base plate. The weights pivot on their mounting posts. The flyweights are really the only moving parts in the electronic Bean Can. The Hall sensor is found in some 1980 and all later bikes. Points previously.
The advance mechanism can be cleaned fairly well without disassembling the Bean Can; although it will be necessary to remove the ITU from the engine and retime the engine afterwards.
There is a small, sausage-shaped, metal plug on the exterior of the ITU. Pry the plug off to expose the inner black magic workings.
Suggest using a mild solvent to swish around inside the advance mechanism area. What the stronger carb cleaners will do the the plastic bits might be problematic. Mineral spirits would be a good choice.
Drain and blot several times; checking for a final clean solvent rinse.
Rotate the ITU shaft and get a drop of light oil on the weight's pivot points. Whatever lube selected, if any, for the base plate should be very light weight. Any heavy grease will obviously impact the free movement of the fly weights. You will look for free movement and return of the weights.
Hopefully, this info will be useful.
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Monte, your post on the sticking point of the high idle issue should be made sticky.
Also, do you think silicone grease from a spray can would be alright on the flyweight pivots?
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Nice - now we're talking - thanks Monte. Can someone move this to the FAQ section down below. The search engine on this site is rarely helpful.
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... do you think silicone grease from a spray can would be alright on the flyweight pivots?
I have a spray can of CRC HD Silicone Lubricant (not grease) that I believe would work well. It's so easy to over do the spray lubes -like the CRC LubriPlate Grease- in confined areas.
Dat's my $0.02 worth.
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Thanks, Cuz!