Its a simple reason, but one that I have experienced when I had a bottom outlet.
The fuel pipe is split at that point, making it possible to pull the fuel pipe off the nipple. Fuel then pours out all over your leg and the track.
There is often a big bight of fuel pipe unsecured on the floor tray, and it's one bit of the bight has poked over the side and eother got caught on the track or had a hole worn through. A top loader fuel pipe is normally secured in the little lugs provided on the steering arm supports.
There's enough fuel in the carb to get you quite a way down the track too, so you are dumping an oily fuel all over the track, probably on the rubbered in bits. Even small quantities are very slippery.
So the next thing that happens as you pull to an unscheduled stop, wondering what has gone wrong, is another competitor, out of control, locked up and sliding into your rear bumper.
It happened to me at Clay and it scored 11 karts on one corner. (Not all on the oil, in the end, there just wasn't anywhere else to go).
Even worse, sometimes the whole bottom fitting unscrews a bit. Then you dont just pour fuel on teh track for half a lap, you can do the whole race, wondering why it's got so slippery.
|
|