Mud in My Blood Forum banner

750 brute force knocking

40415 Views 34 Replies 13 Participants Last post by  NMKawierider
my 750 brute has a knocking noise
i took off cover where belt is located
and im hearing the knocking noise coming
from the clutch area
any help please
21 - 35 of 35 Posts
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
Where would it be located on a carbed model? Ive never noticed one myself but I havent really looked either.

So the only real preventitive thing you can do to avoid this problem is shut off the fuel and keep an eye on the oil. So is there a design flaw in the kawai v-twin cause this has come up a lot lately, atleast a lot more than I think it should specially on something as new as Phree's bike. I guess Ive just never heard of anyone I know having this kind of problem ever with other brands or models. I guess what Im saying is I cant afford to do a complete rebuild every year or two and if this is what I have to look forward to then maybe I need to get it goin and send it down the road. Its just hard for me to see how this kinda thing happens so often when Ive got buddies with Rincons that have done absolutely nothing as far as maintenance and beat the tar out of them for 3 or 4 yrs and havent had a single problem. Ive got another buddy that has a 2000 sportsman that has been very hard on it every since the day he got it off the showroom and aside from belts tires and the oem clutch hasnt ever been broke down or had any kind of problem show up yet. I mean these guys are VERY hard on things I could never make someone realize how much abuse these guys put on there machines with virtually no repair or maintenance costs.
See less See more
It will be on the right hand side of the quad when seated should be right under your leg. It(main bearings) is not a problem when maintained properly,I have over 1400 miles on mine and have not had a prob. but I change my oil every 10-15 hours or if i smell gas in the oil . also all your buddies you ride with have quads that are to weak to break anything. :haha:
Yeah thats been my arguement but if I have to hear "shoulda bought a honda" one more time I might beat one of them to death. I do have to give credit where credit is deserved though these guys both have 680rincons and 400ex's and after what theyve put them through I sometimes think theyre bulletproof. The 400s have been hydrolocked or exhaust swamped so many times its amazing they still run cause they just pull the plugs drain them out and away they go and they run like there brand new even though theyve been treated like that for 3+yrs. And unfortuneatly the 680s are heavily modded and will run right along side me till about 65mph then thats all theyve got.

Im not trying to bash my Brute cause when it was up and going I loved it, but Im not rich and dont wanna go down this road again if I can avoid it. So I guess when I find someplace to rebuild it Ill just have to make sure to keep the gas off and the oil full and fresh

What is comsidered high miles for a brute? I only had mine for a month but still put 200miles on it.
See less See more
Bring it to me I will rebuild it for you ;)
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.
ive owned it like a couple of months since i bought it im hearing the knocks in neutral and in gear.the belt has slipped like twice since ive got has never sunk in water.the belt finally gave away now it has no belt .when i start i hear knocking sounds like right there by the primary.
If the knock increases with rpm then go ahead and stop riding/starting it. It could break a rod and cause more damage.
how many miles? don't the clutches start to knock or make a knocking like noise as the miles rack up
They'll knock at idle but if its the clutch it will go away with increased rpms.
prolly chunk of belt flyin around in the cover or jammed behind one of the pulleys
heres what happens when she blows big time do not run these machines with a bad knock
Connecting rod

Auto part Engine Automotive engine part Tool accessory Automotive super charger part
See less See more
How Often Should You Change Your Oil Or Any Of The Other Vital Fluids?! I Try To Check Them Often... :mrt:
I sunk my 07 brute and it wouldn’t start. After changing the oil and fishing the engine out several times . I changed fuel and clean carbs. Tapped on roll over switch for like 4 days and it busted off. Ran perfect for about 15 mins. Killed and started up again ran for about 5 mins and it started knocking. What’s wrong with it
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.
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.
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'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.
21 - 35 of 35 Posts