Post by glemon on Nov 3, 2024 10:33:56 GMT -5
Here is my dilemma. I bought a 1983 Yamaha CV80 a month or so ago. My first scooter. When I test rode it, it ran great, so I came back with a cash a few days later to buy it and ride it home.
It ran for about a mile then quit, looked at a lot of stuff, like gas tank venting and such, hooked up a hose, same thing a couple more times only shorter rides. Headed back ran quit, ran quit, slow quit like running out of gas. Pushed it the last quarter mile or so back to the seller.
He offered me a haul to my house and an apology for the scooter quitting (though no money off the deal). Nice old guy with an acreage, was doing a brake job on a Buick when I first looked at the scooter so I figured he knew how to do things, he also had many scooters.
.I asked if it ran on pre-mix or the oiler worked when I first looked at it, he said oiler worked fine. Anyway getting to the crux of it, oiler worked fine but the line to the carb was disconnected and the oil feeding the carb blocked off, and the gas in the tank was crystal clear.
I put some pre mix in it and a new spark plug and it starts and runs as sweetly as a forty year old scooter could, but I wondered what damage I did. A compression check showed me at 90 PSI, which seems awful low.
I will say again it starts and runs well, with a bit of time to build up top speed is in the low thirties (contemporary reports say 35 or 36 mph) that is with 210 pound me on board. I wouldn't mind a little more oomph (have considered getting a stock exhaust from a later CV80 that made about 2 more hp) maybe rings or an engine rebuild or at least rings, then again it all works, the more I read about old two stroke scooters the more I wonder if I should mess with the magic.
What would you guys do?
It ran for about a mile then quit, looked at a lot of stuff, like gas tank venting and such, hooked up a hose, same thing a couple more times only shorter rides. Headed back ran quit, ran quit, slow quit like running out of gas. Pushed it the last quarter mile or so back to the seller.
He offered me a haul to my house and an apology for the scooter quitting (though no money off the deal). Nice old guy with an acreage, was doing a brake job on a Buick when I first looked at the scooter so I figured he knew how to do things, he also had many scooters.
.I asked if it ran on pre-mix or the oiler worked when I first looked at it, he said oiler worked fine. Anyway getting to the crux of it, oiler worked fine but the line to the carb was disconnected and the oil feeding the carb blocked off, and the gas in the tank was crystal clear.
I put some pre mix in it and a new spark plug and it starts and runs as sweetly as a forty year old scooter could, but I wondered what damage I did. A compression check showed me at 90 PSI, which seems awful low.
I will say again it starts and runs well, with a bit of time to build up top speed is in the low thirties (contemporary reports say 35 or 36 mph) that is with 210 pound me on board. I wouldn't mind a little more oomph (have considered getting a stock exhaust from a later CV80 that made about 2 more hp) maybe rings or an engine rebuild or at least rings, then again it all works, the more I read about old two stroke scooters the more I wonder if I should mess with the magic.
What would you guys do?
