I have a problem with my carb, and I can’t seem to find the problem. Last week I had a race, and I spent almost all day to find the correct setup. One didn’t make the kart start at all, the other one started but stuttered until i reached 10 000 rpm and couldn’t reach more than 13 500rpm.
The last setup I did before the race was SPOT ON… but when I was racing, one of the racer I passed during the race told me that my Carb was overflowing like crazy from the 2 little vents on each side of my VHSB30 Carb. And i does it all the time, from stand still to WOT.
Now, I have clean every passages in the carb before and made sure every part was clean before racing, so WHY is the fuel going out from there all the time?
Can you explain and help me with this? Is my carb broken?
1) Are the vents routed up over the carb?
2) Do you have a return line to the tank?
3) Is the tank vented?
4) Can you post pictures of your current setup?
5) Why did you replace the round pump with the square one?
If it’s doing it at a stand still it’s either your float level or your float needle and seat or possibly a punctured float. With the Dellorto pump you don’t use a return line. It’s possible that your old set up with the Mikini pump and return line was covering up a carb problem you had all along.