The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Adrian on July 13, 2018, 10:51:13 PM

Title: R65 1984 Diode Board
Post by: Adrian on July 13, 2018, 10:51:13 PM

Hi there - a friend has a totalled diode board on his 1977 R100s. I have a second hand one from my 1984 R65 - will it be suitable for his  bike.

Title: Re: R65 1984 Diode Board
Post by: wilcom on July 13, 2018, 11:08:16 PM

Quote

will it be suitable for his  bike.
                   

Same part number for both Adrian

Title: Re: R65 1984 Diode Board
Post by: Adrian on July 14, 2018, 12:14:36 AM

Thanks Wilcom - great news [ch128077][ch128521]

Title: Re: R65 1984 Diode Board
Post by: svejkovat on July 21, 2018, 12:00:52 PM

I potted my diode board in epoxy almost 20 years ago and (knocking on wood) never had any issues.  I remember marveling at the service manual cautions about accidentally grounding it when removing the front engine cover.  Really? They'd leave something that important so vulnerable? I considered gluing some form of dielectric, even cardboard, to the top of it to prevent such, then just decided to pot the damn thing altogether against all elements.  I was slightly worried about any heat retention effects on the life of the diodes but this many miles later it seems to be just fine.

Title: Re: R65 1984 Diode Board
Post by: BPT on July 21, 2018, 02:51:35 PM

I've often wondered about that as well Svejkovat.  It's one of the first things I learned about removing the cover and can't understand why they didn't come up with some way to insulate something in that area to keep the short from happening.