Hello all. Been lurking for quite a while now but figure it's time to sign up.
About me: I'm an ICU Registered Nurse at a big Atlanta hospital. I bought a 1983 Suzuki GS550 when I was 17 years old and have had about 15 bikes since then. Most of them Japanese and most of the standard street bikes. Last running bike was a KLR650 that I rode for 7 years and about 70k miles including a few big trips. The motor died right before my son was born 3 years ago, and I haven't ridden since (except my Yamaha Zuma 125 commuter scooter).
About the bike: Met a guy about a year and a half ago that was looking to clear out his garage in preparation to move. He heard I like to work on motorized things and made me a deal I couldn't refuse. He'd let me have it for $200 if I could get his 1982 CX500 out of his garage that day. Hadn't been run in 5 years or so. I brought it home, put in a new battery, spark plugs and cleaned out the fuel tank. That's about as far as I got before Covid got crazy in Atlanta and I started working a lot of extra shifts. Just now getting back to resurrecting this old girl.
It will start and run, but intermittently drops the left cylinder. I'm gonna get in the shop tonight and start troubleshooting with the help of all the online resources for the CX500. I'll start another post as I start to dig in to the old girl.
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ThanksYou are one of the heroes in the world. To help all those people fight Covid. I hope is bike gives you a little R&R from work that you truely deserve. Sounds like a good carb cleaning is what you need and the best way to do that is Larry's Carb Book.
Thanks Keith! It's been a helluva couple years at work. It'll be a lot nicer when I can ride this motorbike back and forth to work.You are one of the heroes in the world. To help all those people fight Covid. I hope is bike gives you a little R&R from work that you truely deserve. Sounds like a good carb cleaning is what you need and the best way to do that is Larry's Carb Book.
I think it may be an electrical/ignition problem due to the intermittent nature of the failure. Usually it will start up on both cylinders from cold. It'll run fine and take throttle for about 30-60 second before the left cylinder drops out. After it drops, spraying carb spray into the intake does not bring the dead cylinder back to life. Also with the bike running on the right cylinder, and the left plug stuck in the boot and grounded to the engine the left cylinder still has spark. I would think that if the left carb was plugged the cylinder would come to life when I spray carb cleaner in the intake. The fact that the cylinder still has spark but won't run is a bit puzzling. Could be that the spark on that side gets weak once it heats up (bad coil or HT lead). Could be an issue with the ignition timing mechanism. Could be valve lash too tight on that side and it loses compression after it warms up a bit. I'm going to start doing diagnostics within this upcoming week and start another thread once I have more information.