MOTOBRICK.COM

TECHNICAL MOTOBRICK WRENCHING In Remembrance of Inge K. => The Motobrick Workshop => Topic started by: mister_anger on September 02, 2018, 11:14:44 AM

Title: K100RS 1984 no spark
Post by: mister_anger on September 02, 2018, 11:14:44 AM: hello,

I have been working on my K100RS for 8 months and the project is done.
I am trying to start the bike but it will not start.
I have spark on spark plug 1 and 4 but nothing on 2 and 3.
Ignition coils are brand new and are OK.
I have a document that tells me how to trounleshoot everything but I am not elecrtician so I have a question.
I think the EFI is the problem.
The document tells me that I should measure 1.5 to 4 Volt AC on pin 9-10-14 of the female plug of the EFI.
I have no idea on how the measure this? Maybe someone can run me through this?

thanks, Miochel
Title: Re: K100RS 1984 no spark
Post by: bluebossa on September 23, 2018, 12:39:16 PM: I've troubleshot a few of these now.

Forget efi for a while, just take tank off, clean every connector, and I mean everything.
Take earth's off on frame, clean with grit paper, reassemble... Report back
Title: Re: K100RS 1984 no spark
Post by: K1300S on September 23, 2018, 06:42:43 PM: Quote from: bluebossa on September 23, 2018, 12:39:16 PM
I've troubleshot a few of these now.

Forget efi for a while, just take tank off, clean every connector, and I mean everything.
Take earth's off on frame, clean with grit paper, reassemble... Report back

what he said. the #1 item for no start is bad electrical connections...especially the grounds. main ground under tank and main ground at battery. BTDT.
Title: Re: K100RS 1984 no spark
Post by: Laitch on September 23, 2018, 07:07:35 PM: This is one of those occasions when a problem was posted in a couple of places but the OP didn't follow up on one of them. The problem was posed then the solution apparently found by the OP in this thread—a faulty Hall Effect Sensor (http://www.motobrick.com/index.php/topic,11639.msg101843.html#msg101843).