Good afternoon everyone, My name is Mike and I'm trying to help my son complete a build on a project bike. First off, I'm not a rider. I am however a competent do it yourselfer with two car restorations under my belt. I am not easily intimidated by a problem, but I know when I'm at the point where I can make things worse.
My son has had a 150f and currently rides a 150r. He really likes helping me work on cars and his bike, so he wanted to see if he could take on a project. We just picked up a project 230f bike that runs and is mostly there. When we tested the bike it ran, but didn't seem to smoke all that much. Once we had the bike how we tore it down to the frame and engine and cleaned everything. During the test ride the choke was left on a little bit as the seller said it would cut off. I figured the carb needed a rebuild. I purchased a kit off ebay and my son did a minor rebuild. He replaced the three jets, float needle and replaced a missing white shroud inside the float bowl. Its probably worth mentioning that the seller rigged up the float needle with a piece of wire. It seemed to function, but it looked bad. After my sons' minor rebuild the bike started up instantly, but smokes and smells very rich. Oh and it bogged if you attempted WOT. I took the carb back off and verified that the new jets were labeled the same size. The jet that screws into the center shaft was listed as 102 on the new and old, but the new looked like a larger center hole. I decided to clean and reinstall all of the old jet parts along with a through cleaning of the housing, ports, etc... The bike sounds better now and does not bog, but the smoking and rich smell persists. The smoke it grey in color. Would this be an indication of the carb still not right or would you say the rings are probably shot.
I joked with my son that maybe it didn't smoke because it was low on oil that night. We changed the oil just before the carb rebuild and not a lot of oil drained out. I will also add that this bike was not well maintained before we bought it, so I'm sure new rings and such would definitely help. The only issue is cash. My son doesn't have a lot left after the purchase and after spending $250 on parts and supplies I'm in budget mode.