The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: John M on April 14, 2013, 08:43:02 PM

Title: condensation on inside face of tachometer
Post by: John M on April 14, 2013, 08:43:02 PM

Hi all, my newly resurrected R80 ST is plated and on the road now. she is working well except that when riding I am getting fogging on the interior of the tachometer glass. this seems to happen every time the bike is ridden.
                               Comments?   Solutions?                                      Best Regards John

Title: Re: condensation on inside face of tachometer
Post by: Bob_Roller on April 14, 2013, 08:49:34 PM

The tachometer is not sealed, if you wash the bike, ride in rain, it pretty much fogs up, my '81 R65 has done it since I've had the bike, a little over 32 years now .

Title: Re: condensation on inside face of tachometer
Post by: John M on April 14, 2013, 09:20:06 PM

That's curious. My 1986 R65 doesn't suffer from this problem .
              Best Regards  John
    

Title: Re: condensation on inside face of tachometer
Post by: Armen on April 14, 2013, 09:51:17 PM

Used to happen to mine. If it stays, pull out a bulb and shoot some hot air in with either a heat gun or hair dryer.

Title: Re: condensation on inside face of tachometer
Post by: tvrla on April 15, 2013, 11:46:11 PM

Quote

That's curious. My 1986 R65 doesn't suffer from this problem .
              Best Regards  John
    

Your gauges are different than 'normal' R65s. The monoshock bikes have a plastic gauge pod with two gauges inside - much different than the earlier bikes with the tach and speedo each in their own metal canister.

LED illumination light bulbs help with the fogging.

Title: Re: condensation on inside face of tachometer
Post by: John M on April 16, 2013, 02:21:06 AM

Thanks  to all for the responses. I will look into replacing the bulbs with LED's and see if that improves the situation ( only the Tachometer seems to have the fogging problem ).    Type of LED required for instuments ??
1984 R60 ST.
                                 Best Regards John  

Title: Re: condensation on inside face of tachometer
Post by: Bob_Roller on April 16, 2013, 08:03:37 AM

Do not install an LED bulb in the 'GEN', position, if you do, the alternator will not work .

The LED doesn't draw enough current to get the rotor energized enough for electricity to be generated .