Wildguzzi.com
General Category => General Discussion => Topic started by: GuzziNZ on October 07, 2024, 07:10:18 PM
-
I still have the original switch gear on my 850T and amazingly it all still works apart from the start button which is very temperamental.
Anyone have it apart to clean contacts?
-
Been over 25yrs but did a few. Simple switch, take apart slowly, don't loose any parts. Don't let it go boing! It could be the solder getting loose on wire. Just so you know. So take apart carefully. Do a search, might find pics.
Just had a thought, might find a new one at Harpers, they used to have stuff like that.
-
Sure it's the start button and not the starter solenoid (or other parts of that circuit)?
I went nuts on my T3 with an intermittent start issue and the final solution was an EME replacement starter.
-
Hi Ron.
The first thing I did was to pull 3 pin plug to starter switch block, hooked up meter and pressed button.
Got no reading to earth.
-
If I recall correctly, ground for the starter relay circuit is made inside the switch by a small tab of metal that contacts the handlebar. Of the 3 wires, one is hot power to the switch, one becomes hot to the coils when the switch is slid to ON, the third is the wire that gives the ground from the bar to the starter relay. If you want to check my work, (I haven't been "vetted" on this forum yet), check for continuity from the 3 wire pigtail to one of the terminals on the relay. It's an easy find, your schematic will give you the terminal number. My 850 LeMans did the same thing, took the switch apart and right where the little tab was given a surface to make contact with bare metal, there was some rust preventing it. The slightest rotation of the switch would take away the bare metal spot to contact. Switch will pull apart laterally, as Steve K. says, BE CAREFULL. Miniature springs, tiny pieces, nothing really robust. If that is what is going on, due to cleanable detritus, or that the little metal tab has lost some of it's spring, maybe you can tweek it a bit to give it more tension against the bar.
TdF
-
I think sliding the brass strip between the bars and switch block made the connection to earth for the tab.
Had to try a few different positions until I got a reliable reading on the meter.
-
Idk, try this....
https://www.thisoldtractor.com/moto_guzzi_tonti_handlebar_switch_-_early_right_-17635000_or_18735040-.html
https://www.thisoldtractor.com/moto_guzzi_tonti_handlebar_switch_-_early_left_-17746020_and_17750301_or_18746040_and_18750340-.html
Art
-
Those switches are a nightmare to deal with. On my Convert, I gave up,and installed late model aftermarket switches,and never looked back.
Rick.