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View Results: What is the horrible noise?
Cam chain tensioner 2 5.13%
Camshaft rockers / bearings 10 25.64%
Big end 10 25.64%
Gearbox main shaft bearing 3 7.69%
Crankshaft bearings 8 20.51%
Other? 6 15.38%
Voters: 39. You may not vote on this poll

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Old 03-03-2013, 10:07 AM   #76
gunnerbuck
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Originally Posted by Boon Booni View Post
From what I can tell the conrod bearing doesn't control the lateral play. There are two thrust washers in there that do that. But if the spec is 1mm, I'd measure it before I declared it shot.

IMHO it's hard to tell just from looking at it.
Unless I am seeing an optical illusion in the video it is very easy to see...

When he moves the conrod the bearing cants over as you can see a gap opening up and pinching closed on one side of the bearing and not the other, this is not normal...
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Old 03-03-2013, 10:40 AM   #77
Boon Booni
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Originally Posted by gunnerbuck View Post
Unless I am seeing an optical illusion in the video it is very easy to see...

When he moves the conrod the bearing cants over as you can see a gap opening up and pinching closed on one side of the bearing and not the other, this is not normal...
Got it. It's not the lateral play you're worried about, it's that that conrod can rock on the bearing.
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Old 03-03-2013, 10:17 PM   #78
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Originally Posted by gunnerbuck View Post
Unless I am seeing an optical illusion in the video it is very easy to see...

When he moves the conrod the bearing cants over as you can see a gap opening up and pinching closed on one side of the bearing and not the other, this is not normal...
That's it, you can see the rod lift a little.
The piston and bore look good and the rings too(so far).

I'd replace the intake cam follower for safety.

Moto psycho. Is there an oil mess in the bottom of your airbox?

bill
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Old 03-04-2013, 12:26 PM   #79
ericGSsti
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What KTM thought was a fix wasn't. I noticed my engine was still noisey. I mensioned it to them when i pick it up. Said it was normal that those engine are just noisey. Clocked up 200 km on it and the noise got worse. Dropped it back to KTM this evening. Called the head guy out and started the bucket of spanners up. He was suprised and killed the engine staight away.

Engines coming out for a rebuild on Wednesday.
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Old 03-08-2013, 08:45 AM   #80
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What KTM thought was a fix wasn't. I noticed my engine was still noisey. I mensioned it to them when i pick it up. Said it was normal that those engine are just noisey. Clocked up 200 km on it and the noise got worse. Dropped it back to KTM this evening. Called the head guy out and started the bucket of spanners up. He was suprised and killed the engine staight away.

Engines coming out for a rebuild on Wednesday.
That sucks! I'd imagine they'd give you no reimbursements for false diagnosis either :p.

Got the crank out of mine, bearings are A-OK!! Just the rod bearing, now it is out of the case you can feel a minor (0.25mm ish) amount of vertical play. Hopefully just a case of replace that and the piston, and plonk it all back together :).

Airbox was dry.
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Old 03-08-2013, 09:38 AM   #81
ericGSsti
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Fingers crossed for you man, it was the bearing on tg counter balance clutch side that cased my problem. Have a thread up with pics.
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Old 03-08-2013, 10:59 AM   #82
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Wonder why the big end bearing failed? I'd be checking the two pumps are in spec and all oilways clear of debris to make sure the whole engine is getting fed decent amounts of oil.
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Old 03-08-2013, 11:41 AM   #83
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I ran the bike with a bit of diesel in the oil before I stripped it to clear any blockages, and before it goes back together I'll blast the oil lines through. Oil pump is absolutely fine. It just seems to be a common fault on these :( hence I will be going Wossner.
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Old 03-09-2013, 07:24 AM   #84
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I ran the bike with a bit of diesel in the oil before I stripped it to clear any blockages, and before it goes back together I'll blast the oil lines through. Oil pump is absolutely fine. It just seems to be a common fault on these :( hence I will be going Wossner.
Hey just for the fun of it. Can you weigh the Wossner piston assembly next to the stock unit?

I did that with the KLR and was shocked at the weight difference, with the Wossner being substantially lighter than that stock unit.
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Old 03-10-2013, 10:53 AM   #85
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No problem! Any guesses what the difference will be? There could be a prize! Broken rod bearing perhaps?
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Old 03-15-2013, 01:05 AM   #86
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Anybody bought the ProX rod kit before (wossner not available apparently!), bought mine off eBay,

1 - Does it come with a small end bearing? Website says it does, but I have not received!

2 - These scores are horrendous. For precision bearings this is shocking, needless to say I am returning this kit.

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Old 03-15-2013, 01:44 AM   #87
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Mine is mirroring yours at the minute. I have it back in with KTM as noise was still there. So much for giving it to a main dealer. 1100 spent and they are only considering splitting the engine now. I'm going over today to take the bike back and give it to a different mechanic to strip. He recons rod bearing or crank bearing or main. These could be one of the same things as I'm not up on parts.
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Old 03-15-2013, 03:30 AM   #88
Boon Booni
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Originally Posted by moto_psycho View Post
Anybody bought the ProX rod kit before (wossner not available apparently!), bought mine off eBay,

1 - Does it come with a small end bearing? Website says it does, but I have not received!

2 - These scores are horrendous. For precision bearings this is shocking, needless to say I am returning this kit.

What is this a picture of? Is that something you bought?
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Old 03-15-2013, 07:06 AM   #89
Kawidad
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What is this a picture of? Is that something you bought?
I believe its the Pro X rod he purchased.........
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Old 03-15-2013, 07:18 AM   #90
gunnerbuck
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Quote:
Originally Posted by moto_psycho View Post
Anybody bought the ProX rod kit before (wossner not available apparently!), bought mine off eBay,

1 - Does it come with a small end bearing? Website says it does, but I have not received!

2 - These scores are horrendous. For precision bearings this is shocking, needless to say I am returning this kit.

I'm wondering if those evenly spaced slot marks are put in on purpose to hold oil on the running surface? They seem too uniform to just be random machine marks...

The 640 does not have a small end bearing, instead it runs a bushing..
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