Trouble starting.................

Mace · Full Member Joined: Jul 22, 2008 Posts: 51

i picked up an 80' sx650 and have had it running great...started right up no problem. Went to start it last night to bring it into the shop about midnight...pu;;ed the choke and tried to start it...nothing...choke half in...nothing...all the way in nothing...gave it a little gas ...nothing then all of a sudden BANG!!! backfire....scared the crap out of me....the wife came running and the guy across the way turned his lights on! anyway tried to start it tonight and it coughed a couple of times but it wouldnt fire....then the battery craped out...so that went on the charger for the night...
Any thoughts???????????????????
Thanks
ace

Joseph · Full Member Joined: May 22, 2007 Posts: 767 Location: NY

i have an 80 also, satrts beter with kick. I know the 1or 2 times i had trouble starting mine i got a huge backfire, actualy sounded like something in the exhaust was so load I thiught for sur something broke but there was no damage. As far as your bike not starting i'm sure, but someone here will help.

xsjohn

Needs to have a good battery and some led's in the tail light will help it stay charged.........and they are somewhat too advanced.....xsjohn

BigGeorge · Full Member Joined: Apr 13, 2008 Posts: 267

MACE, pull the spark plugs out and see if they are wet (gas fouled) If so clean or replace them. While the plugs are out reconnect the spark plug wires to the plugs and lay the plugs against the cylinder head fins and crank the engine (electric starter) with the ignition and kill switch "on" and watch the plugs to see if you get a good blue spark across the plug gap. If so reinstall the plugs and try this method of starting your bike> With the choke all the way off start cranking the engine with the electric starter and at the same time start pulling the choke out slowly. Usually the engine will find the "sweet spot" in the fuel circuit and fire up. I have an 81xs and thats how it starts for me..................BG

Mace · Full Member Joined: Jul 22, 2008 Posts: 51

All right....never seen this before. I pulled the plugs and checked the spark. The plugs look new, so the guy I got it from must have put them in.
Hit the starter and they spark a few times and then stop. ?????
So I'm thinking this is my problem.
So what would cause this?
Thanks for all the help guys.
Wish they had forums like this when I was younger...probably could have saved a lot of old bikes.
ace

PS I do have spare electric stuff from the same year bike.

Shannon60

John is right good battery and give it a kick

Mace · Full Member Joined: Jul 22, 2008 Posts: 51

The battery holds a charge. I hit the starter and it sparks a couple of times and stops....any clues? If the battery is turning the motor over it should be sparking the whole time your hitting the starter button right??
Tried kicking a few times...nothin. Sad

Help!
ace

BigGeorge · Full Member Joined: Apr 13, 2008 Posts: 267

Mace, I want to say it sounds like a weak coil but I'm relatively new to Japanese electrics and there are others here who have had much more experience with such problems. I know I'm not much help but if we keep bumping this question to the top eventually someone will come forward with a solid answer for ya................BG

jayel

check the kill switch, connections and switch itself, 30 years of corrosion

Mace · Full Member Joined: Jul 22, 2008 Posts: 51

Thanks for the bump Big George! I appreciate it.

Jayel, I will check the switch. I did use it for the first time before it started doing this...before that I was just using the key.

Thanks for all the help.
I am still interested in your thoughts....
ace

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