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alternator or regulator 900 GTS
Posted: Fri Sep 13, 2024 8:16 am
by aerobics mc
Hello all, I'll try my best to be stringent. My 1979 900 GTS has always been a easy starter - with the starter motor removed... The bike has been used extremely sparsley for close to 20 years. Now with a new battery the bike won't start and the battery loses it's current. A fuse also burned.
I wonder if I should go for the regulator or the alternator, or maybe both? What diagnostics can be useful here?
I'm sorry it the topic has been covered before, and for language flaws.
Kind regards, Daniel
Re: alternator or regulator 900 GTS
Posted: Mon Sep 16, 2024 11:19 am
by BevHevSteve
I would start off by going through all your connectors, clean with contact cleaner and put a dab of dielectric grease on re connect. And, put star washers under all grounds. Run an additional ground from (-) terminal of the battery to where your clutch cable is threaded into the boss on top of the transmission. I also drop the motor and buff/sand the lower part of the frame down tube where the motor is held so you have good grounds everywhere. I think you will find the connectors at your regulator are semi melted and will need to be re done...
Re: alternator or regulator 900 GTS
Posted: Mon Sep 23, 2024 5:03 am
by aerobics mc
Thanks Steve, much appreciated! What I particularly like is the bottom up approach, starting of with the basics. I will check into the issues you mentioned, trying to find some way around dropping the motor....
All the best/daniel
Re: alternator or regulator 900 GTS
Posted: Mon Sep 23, 2024 11:16 am
by BevHevSteve
just tilt it down. front and rear/top bolts out, exhaust off and lower a bit....
Re: alternator or regulator 900 GTS
Posted: Wed Oct 02, 2024 6:19 am
by aerobics mc
I was thinking something down that route
Cheers
Re: alternator or regulator 900 GTS
Posted: Thu Aug 20, 2026 2:41 am
by aerobics mc
Hi there, time for an update! First, this project is no sprint, it's more in the spirit of Robert M. Pirsig kind of thing
Regarding the subject I did follow your advice, Steve, almost to the letter. The buff/sand business however was replaced by a can of BRAKLEEN (chemical magic, but probably a good idea to stay away from the fumes). I think it was on the third kick; KABOOOM and the old Bella sprung into life. I let it idle for a couple of minutes and from what I can judge, your take on this matter was extremely GROUNDED
Next update will involve a late summer ride with a follow up on performace.
Ride well, daniel