srijeda, 3. listopada 2018.

Flashers


Flasher assembly FE246BH

Like on many other non-Virago motorcycles, the flashers on Virago models xv125 and xv250 are managed by assembly FE246BH (3GM-83350-01-00) previous versions were 3DM-83350-00-00 and 3DM-83350-01-00:

flasher assy FE246BH
3GM-83350-01-00

Flasher assembly 41R-71

Again, like on many other non-Virago models, the flashers on bigger Virago models xv500, xv535, xv700, xv750, xv1000, xv1100 are driven by Japanese corporation DENSO's assembly 41R-71 (41R-83350-71-00). As written on the assembly itself, it produces flashing frequency of 85 flashes per minute, supports connection of two flashing lights 2×27 W plus small indicator bulb of 3,4 W.

The same assy for flashers was used from the beginning til the end of Virago motorcycles production.

flasher assy 41R-71
41R-83350-71-00
assy connectors and wire colors

B = Black = negative pole (-)
R = Red = positive pole (+)
BrW = Brown - flasher
YR = YellowRed - flasher
WG = WhiteGreen (auto-cancellation)
This assembly actually consists of two parts. Left part on diagram (four connectors) is so-called cut-off relay. This is small relay which engages the main and biggest starter relay. Right part (four connectors) is electronic flasher circuit producing flashing functionality for direction lights. Middle connector is ground.
41R-71 assy inside



Flasher auto-cancellation

Bigger Yamaha Virago models do have the flasher auto-cancellation functionality which automatically turns flasher lights off after some predefined period of driving time (about 15 seconds) or after some driving distance (about 150 meters) - whatever occurs earlier. So, if you turn flasher lights on and forget to turn them off, Virago will automatically turn them off after 15 seconds of driving or after 150 meters of driven distance. This applies only if the bike is in motion (and gear not in neutral position). If the bike does not move, this functionality does not work and flasher lights will continue to flash.

The driving period measures the 41R-71 assembly on its own while the info about the passed distance this assembly receives from reed switch connected to through white-green (WG) wire.

The reed switch is one small magnetic switch residing inside speedometer housing. This switch consists of two metal reeds which do touch each other (make electrical connection) and turn the switch on when there's a magnet close to them. On kilometer counter, inside the speedometer gauge, there's a small rotating magnet pin which rotates and passes close to reed switch turning it on and off while the bike is moving. This is used as an indirect info about driving distance and it is sent to flasher assy in order to automatically cancel flashing lights after predefined distance (of course, if driver on his own does not turn them off before).

Rotating magnet which turns reed switch on
Reed switch which measures driving distance

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