Has anyone had issues with the 22 dumping fuel out of the overflow while on track? This is my 4th v4 and I have removed the evap canister as the first mod on all of them. This weekend I was flagged multiple times but only on a hard left hand turn while the thank was 3/4 full.
22 V4 fuel leak on track
- Thread starter Tricky1
- Start date
Jrkk
Well-known member
Early models had problems with over pressure in tank. There was recall about that and they removed small steel ball from tank breather.
That causes fuel leak easily if tank is too full.
3/4 should be OK though.
I have put steel ball back to breather and never had any broblems. Evap canister removed.
That causes fuel leak easily if tank is too full.
3/4 should be OK though.
I have put steel ball back to breather and never had any broblems. Evap canister removed.
bp_SFV4
Active member
The ports are the same, but the way its vented after the EVAP canister is different.
bp_SFV4
Active member
The breather line near the overflow on the front left corner of the tank? I have a 2021 and if I tilt the tank forward fuel will only flow out of the overflow line. Its possible it just needs a catch can for track use.
Jrkk
Well-known member
Yes that document describes how to take of that ball.
Of course we do not know exact diameter for that, so I tested couple different size ball. It's not going to prevent vacuum, since it sits top of small plastic notch. When fuel spils, ball hit rubber top piece and prevent further leakage.
Ball needs to be big enough so it sits top of those notches not between. This is important, we don't want to block vacuum.
Of course we do not know exact diameter for that, so I tested couple different size ball. It's not going to prevent vacuum, since it sits top of small plastic notch. When fuel spils, ball hit rubber top piece and prevent further leakage.
Ball needs to be big enough so it sits top of those notches not between. This is important, we don't want to block vacuum.
Jrkk
Well-known member
Remember that was official recall to prevent over pressure in tank, and there was some rare fire case.
So probably voids warranty if your bike burns.
After hot day riding, can you hear fuel boiling. If yes, add some heat shield to tank bottom.
When adding steel ball, indentify hoses and try to check operation of that ball by blowing and sucking from overflow hose.
So probably voids warranty if your bike burns.
After hot day riding, can you hear fuel boiling. If yes, add some heat shield to tank bottom.
When adding steel ball, indentify hoses and try to check operation of that ball by blowing and sucking from overflow hose.
The 22 comes without the ball installed.
please report back
bp_SFV4
Active member
4.5mm ball fixed it. No more fuel drips on hard braking. I even filled the tank to the bottom of the filler neck.
Any over pressure when filling tank?