Ongoing project, 300 fourtrax.
Figured I needed this thread rather than asking questions relating to 'my' 300 in others threads.
As those of you who follow my madness will know, I've recently refitted my snorkel, to which I tested out at the off-road park today, works a treat, everything appeared to be watertight too, submerged above the bars for quite some time in a small lake!
The issue I encountered after snorkelling was my carb was leaking fuel out of the bottom overflow. I fitted a brand new OEM needle valve and thoroughly cleaned the carb, this did the trick, happy days.
This morning I fired it up and loaded onto the trailer only to find it was leaking out thenoverflow again. Annoying on the morning of your planned days ride!
I removed the carb, cleaned and refitted.... 3 TIMES!
Got to the off-road park, yep.... It was leaking again!
I decided to ride anyway as the leak seems to stop after quarter throttle, even at the end of my days riding it still leaked when I pulled up at the trailer. Loaded up, got home, jet washed the 300.... No leak!!
I'm completely stumped, I can't tell you how clean my carb is, its pristine inside, I mean surgically clean!
As for the needle valve, I have cleaned the seat with toothpaste and a cotton bud, before this I used 1200 grit wet & dry with WD40 rolled up into a taper.
What do you guys think?
I'm thinking I've knackered the seat with the wet and dry or try a new float and see if that does the trick. Could be slightly misshapen maybe?
98 300 Fourtrax 4x4
Custom built mud bike - Now sold.
2004 Foreman 450S
Fully overhauled (nut & bolt rebuild), 2” lift kit, 28” mega mayhems, ITP delta rims, ES floorboards, 22” LED lightbar, Pyle Bluetooth sound system.