My Carburetor Story
85 Kawasaki ZN700 Keihin carbs, 4k miles on the odometer
When the battery died, I let it sit for about a year and like a big dummy I didn't drain the carbs. Finally installed a new battery. I had a leaky fuel valve so I removed the gas tank, dumped it and washed the rust particles out with gasoline and rebuilt the fuel valve. The screen was good and I made sure my fuel filter was clear. I had to use starter fluid to get it started. It ran really ragged on two cylinders. So, I poured a half bottle of Gumout for high mileage engines into about a gallon of gas and I have been starting it and running it for a few minutes and letting it sit for several weeks. It ran better every time I started it. Yesterday is the first day it fired on all four cylinders. It runs good at idle but still is not quite right. It doesn't accelerate well so I'm hoping the cleaner didn't destroy the diaphragms in the carbs. Anyhow, I'll keep you updated so you can decide if you'd like to try Gumout (with PEA) in your gas to clean up carbs. PEA polyetheramine is supposed to be th best fuel injector cleaner. Chevron techron may have been the first to use it. Today I rode it about 3 miles and it didn't bog as bad as it did yesterday so the Gumout appears to be still working for me. Monday, I will get it inspected, tag updated and will ride the heck out of it and see if the bog completely goes away.
By the way, I bought an infrared thermometer from Autozone and I love it! I used it to check the exhaust pipes temperatures and could tell which cylinders were firing and how well they were firing compared to the hottest temp! I highly recommend this tool!
1985 Kawasaki ZN700 Shaft, 4cyl
1989 Yamaha Venture Royale