I have tried searching and I haven't found anything that quite answers my question. I guess I will start at the beginning: I have a 94 Sprint (upjet, biturbo, airbox removed) - I had it all last year and it ran like a champ. However, at the beginning of this season it was barely running- IF it would start it would bog down after a minute or when you gave it any gas. My friend and I cleaned the carb and adjusted the idle, put in fresh gas, and fiddled with the petcock. The fuel line was pretty hard (which I now know is normal for nylon line), so we replaced that also, and for the day it was ripping just like normal. We replaced the line with a vinyl tubing (I work at an auto shop and that was all we had to fit it at the moment), and the next day the ped was running badly again- it would bog out if you gave it too much gas.
Some local moped guys and girls (thanks to the bourbon bandits :)) checked it out and found the line was crimping at the curve that goes to the petcock. They replaced it with PVC line with a spring on it, and it was just fine for a nice long cruise that night.
Unfortunately, on my way home it started bogging again. I got it home and saw that the pvc was crimped. I do not know what the spring was for (I assumed to help KEEP it from crimping), but it did not seem to do the trick. I replaced this with automotive fuel line, and it didn't look like it was crimping because it was so much thicker, but it was still running badly. Yesterday I replaced THAT line with some more PVC (the hardware store was the only place open), and it ran like a champ for a while, but after a while it started bogging again- I checked the line and sure enough, it was partially crimped. So I know my problem is only in the fuel line crimping, not in the carb or otherwise.
SO. I just bought some tygon line, and I am going to replace the pvc with this. I wanted to know if someone could give me some insight on how to run it so that it will not crimp. The hard nylon line that was on there never caused it to do this (obviously), but I have been told that this should not be happening like it is. Also, does anyone know if there was a reason for putting a spring on the fuel line? Maybe that helps with keeping it from crimping? I am sure that I'm not the only person to ever have had this problem, what with Tomos' convoluted setup and all.
Thanks in advance