Monster 695 recently making a strange noise from engine

[sl8tr]

Only started making it in last week or so. I haven't ridden it much due to the weather. It's booked in for a valve adjustment and belt replacement soon.

I shot the video with an iphone 4 but the sound comes across ok. It's like a tapping noise, my first thought was valves but it doesn't make it when the engine is cold.

Any ideas?

Monster noise

The bike has open airbox with Termis and the ECU.

Thanks guys

[ducpainter]

Possibly the clutch hub nut, or flywheel nut is loose.

[sl8tr]

that doesn't sound promising...
Is that a complicated or expensive fix?

[Buckethead]

No, especially if they're doing an oil change as part of the service.

If it's either of those things, then it's just a matter of pulling off the side case, remove/loctite/replace whichever one is loose, and then buttoning it back up. Maybe an hour to do both?

Also, how many miles does the bike have on it?

[sl8tr]

26000 km or 16000 miles

[Lieutenant Dan]

I, too, have a 695, (2007). And it is also making strange sounds from what I believe I have narrowed down as the right side, possibly clutch area. It's a very odd "put," knocking noise happening very randomly maybe 5-20 times per minute. Only at lower RPM, especially if I am trying to work the throttle and clutch in a turn from a stop. Almost never at high/cruising RPM.

Basically, I know the flywheel nut coming loose is a common problem. I was going to try and open up the right side cover and take a look, but can anyone tell me if the pressure plate and the flywheel are the same thing? I sure as hell can't find such an answer ANYWHERE on the internet and am very frustrated.

From watching this sweet ca cycleworks video on changing a wet clutch, I'm confident I can open it up and take a look at the very least, but I have no idea if the 'pressure plate' and the flywheel are the same thing! I'm hoping that what he calls the 'pressure plate' in this video is the same thing as flywheel. If it's not, where is it? I sure as hell don't want to go behind that basket and all that. That type of thing scares me!

Thanks so much for your help!

-noob

[Lieutenant Dan]

Also, I meant to add, as this seems quite odd and unlike anyone else's problems I can find around the web, but the bike's RPM's drop a tiny bit when this popping/knocking/putt noise happens. [My thinking, not to put the horse before the carriage here, is that if there is a nut loose and is jostling around inside the clutch, it's catching somewhere, causing the noise and resistance which is what is making the engine drop until it is thrown free.] In addition, it also occurs (though less pronounced and frequent) when the bike is at a stop in neutral. Working the clutch seems to make no difference (when stopped) but revving the motor (SLIGHTLY) does seem to make it happen more (possibly when the RPM's are thereafter winding down).

It first happened very, very rarely, but over the last 6 months, it is happening more and more, especially now that I have moved down from 6,000 ft to 1,000 ft in elevation. I took it to a dealer before I moved and he could absolutely not put a finger on what it was without taking the bike apart.

OK, I think that's all the pertinent information. I am going to try to take video and post it up here as soon as possible.

-Extremely Perplexed Noob

[sl8tr]

Mine was one of the main bearings disintegrating. I checked the flywheel nut and then the clutch. Was looking at the oil pump when I noticed that one of the bearings was scarred and slowly flaking off.

I had been finding bits of metal in the oil screen and on the plug.

Flywheel is on the left side as your sitting on it.

I got lucky when a dmf'er sold me the engine from his totaled 695.

[Buckethead]

[snip] ...but can anyone tell me if the pressure plate and the flywheel are the same thing?

They are not.

The pressure plate is exactly that and only that. It squishes your clutch pack together.

The flywheel is on the other side of the bike. There should be a glass window on the left side of the bike near the clutch slave cylinder. You can see your flywheel through that window. Pulling the left side case "requires" a special tool.

[Lieutenant Dan]

I see. Thanks for the reply! I just found this:

http://www.ducati.ms/forums/80-hall-wisdom/38036-1999-2000-flywheel-alternator-rotor-retaining-nut-problem.html

which has some good info, but is making me think it's probably not in fact the flywheel nut, also because my noise is on the right side. In that case, any ideas as to what that strange noise and associated lurch could be?

sl8r, how much did that engine run you?

[Lieutenant Dan]

Hey, here's a link to a video I took, which if you have a good sound system can give you some insight on the noise.

Now, pertinent information first:
-It's hard to notice at the beginning of the video, but most obvious around 0:55 to 1:10. Watch there for the best demo. I am holding the throttle steady there.
-Also, I am holding the throttle steady from 0:15 through 0:22 and look how much fluctuation I get!
-There is a jet flying over that can be heard at 0:35, not to be alarmed.



Also, question for Buckethead, my left side cover has a black plate with two bolts on it that looks like a glass window could be fitted in there as an aftermarket piece. I'm thinking of maybe accessing that compartment through that small hatch to inspect. Do you know if there is any kind of gasket I would need if I were to remove and then replace this hatch? Heres a picture of what I mean  http://db.tt/bt4QUhaV

[Buckethead]

Hmm... almost sounds like a slight backfire. Have you messed with your intake or exhaust at all?

That hatch is how you pull of that whole side cover. You pull off the hatch, screw in a special plate, then use another screw to push the whole assembly away from the engine. Monsterparts.com has a really nice version HERE.

There's a green (at least mine was green) o-ring on the back that can be re-used, or easily replaced if damaged. Should be less than $1 at a dealer. I don't see any problem with pulling that cover to check for a loose flywheel nut, just be careful what you go jamming into the engine.

Out of curiosity, is that circle above and to the right of the alternator cover (hatch) solid metal? Or is that just glare off the glass? That should be the inspection window I mentioned earlier. Like so:

[Howie]

Hey, here's a link to a video I took, which if you have a good sound system can give you some insight on the noise.

Now, pertinent information first:
-It's hard to notice at the beginning of the video, but most obvious around 0:55 to 1:10. Watch there for the best demo. I am holding the throttle steady there.
-Also, I am holding the throttle steady from 0:15 through 0:22 and look how much fluctuation I get!
-There is a jet flying over that can be heard at 0:35, not to be alarmed.



Also, question for Buckethead, my left side cover has a black plate with two bolts on it that looks like a glass window could be fitted in there as an aftermarket piece. I'm thinking of maybe accessing that compartment through that small hatch to inspect. Do you know if there is any kind of gasket I would need if I were to remove and then replace this hatch? Heres a picture of what I mean  http://db.tt/bt4QUhaV

Yep, sounds like a backfire through the intake.  Too many possible causes, but it sounds possible lean misfire.  Any work done to the bike recently?

[Lieutenant Dan]

Out of curiosity, is that circle above and to the right of the alternator cover (hatch) solid metal? Or is that just glare off the glass? That should be the inspection window I mentioned earlier. Like so:

That circle is indeed solid metal with an allen wrench fitting in the middle. Interesting that yours has a window there. Sorry about the poor picture, I was trying to be timely and it was dark out. Here's a better one from just now:

http://db.tt/sMw85S2e
By the way, how do you embed a picture like that?

Yep, sounds like a backfire through the intake.  Too many possible causes, but it sounds possible lean misfire.  Any work done to the bike recently?

Well, as far as work done, there have been no mods. But like I said it just came back from the shop for its 15,000 mile service where they did sync the throttle bodies, but it had this problem before the 15,000 mile service. Once or twice I ran it for with no pipes while I was painting them. Someone said this could do no harm. Maybe I caused something then?

Any advice on what the next step to take would be?

[Howie]

That circle is indeed solid metal with an allen wrench fitting in the middle. Interesting that yours has a window there. Sorry about the poor picture, I was trying to be timely and it was dark out. Here's a better one from just now:

http://db.tt/sMw85S2e
By the way, how do you embed a picture like that?

Well, as far as work done, there have been no mods. But like I said it just came back from the shop for its 15,000 mile service where they did sync the throttle bodies, but it had this problem before the 15,000 mile service. Once or twice I ran it for with no pipes while I was painting them. Someone said this could do no harm. Maybe I caused something then?

Any advice on what the next step to take would be?

Interesting, I never saw a set up like yours.  Custom?  Wing it repair?  Dunno. 

Running with no pipes did not cause the problem.  Have you been back to the shop who did the service?  Were they aware of the problem before doing the service?  Does the bike run smoothly when cruising?  Accelerating?

IMO, your next step should be a trip back to the shop.

Running with no pipes did not cause the problem.