Have never looked on a efi quad but it really wouldnt need one ,it doesnt store fuel in a bowl for the efi , so fuel leak down may not be a problem with them
ive owned it like a couple of months since i bought it im hearing the knock.it knocks in neutral and in gear.the belt has slipped like twice since ive got it.it has never sunk in water.the belt finally gave away now it has no belt .when i start i hear knocking still.it sounds like right there by the primary.What year is your brute chine?
How long have you owned it?
Did the noise just start or have you been hearing it for awhile?
Does it do it in gear or neutral....or both?
Have you slipped the belt recently?
Has it every been sunk in water?
The clutches are noisy on these Vtwins even when there new but you may have something else going on. Give us a little more info on what you got and what its doing.
All sunk engines are on borrowed time. Some will go a year.. where some won't get 10 minutes...and some won't run any more at all. If it was running when it got water in the crankcase, then it mixed with the oil and was pumped through the bearings which destroyed the surfacing. Also cold water on hot valve stems warps them and causes them to stick in the guides..which holds them open for the piston to hit the valve heads. There are a number of other nasty things that can happen but in any case it sounds like...it's over for yours. It's full rebuild-time I'll bet. nFlow does a great job and warranty's their work. However, being an 07 it may not make ecconomic sence to spend that much on it. Might check ebay.I sunk my 07 brute. Drains everything, pulled spark plugs, changed oil and filter several times. Cleaned carbs, Changed fuel, and tapped on roll over switch till it started. Ran perfect for about 15 mins. Kill it , and started it up again and after about 5 mins it started knocking.