mate had the same problem but realised just after the fuel filter that the line would kink sometimes he fixed it by just putting a zip tie on it....all else fails buy a real mikuni carbi, they're not that expensive.
i own one that i purchased a few weeks ago, just make sure when you put it all together that you re-tighten and loctite all the bolts that are already done up, they are assembled overseas and some bolts might come loose on you.
As far as a cheap 125cc bike goes..they are fantastic. don't even...
well i have a printer that is capable of doing it so i dont pay pay a cent... but some of those sticker kits go for $80 on ebay...thats just ridiculous..its a fkn sticker lol
i'm putting this post on here for a mate as the standard forks on these things are shit...just wondering what cheap USD forks and clamps he should get that will fit and if he will have to change the front wheel too? would be greatly apreciated if you guys had links aswell..
cheers Jimmie