Timing chain noise?

[weasel01]

I was looking at Monte's picture essay on the timing chain replacement and noticed it said it was noisey.

The Clymer doesnt give a replacement period just says replace if timing is difficult and or noisey.

What is the noise like?

When I first start my bike in it's newly tuned state it fires up on the first blip of the starter and will idle almost immediatly and it sounds like mechanical perfection for about 5 minutes.
After it starts to warm up I notice a building noise level which seems like it's coming from the timing chain area?

It's like shshshshshshSHSHSHSHSHSHSHS with some associated rattling sound It's not terrible (yet).

Is this normal or do I have a candidate for replacement?

[montmil]

At high manifold pressures -as semi-coasting down the road with no load on the engine- I'd have an awful screeching sound. A new timing chain kit from MotoBins had everything I needed for a great price.

My issues were: 1) Timing chain was worn but not badly so; 2) the hard plastic components on the chain tensioner and chain guide had begun to disintegrate. Combined, that created my noise issue.

It's all good now.     Monte

PS: If the "S" mark on the flywheel is like "seeing double" when viewed under a timing light, chances are the timing chain is worn, wearing out and/or toast.

[weasel01]

Yes if you recall my confused posts about timing that was part of my issue the smark looked more like a smear than an accurate mark.

[Landlubber]

"It's like shshshshshshSHSHSHSHSHSHSHS with some associated rattling sound It's not terrible (yet)."

nup wait till it goes shshshshshshsSHSHSHSHSHSclunk....then you know exactly when it SHOULD have been repaired.....

[montmil]

"It's like shshshshshshSHSHSHSHSHSHSHS with some associated rattling sound It's not terrible (yet)."

nup wait till it goes shshshshshshsSHSHSHSHSHSclunk....then you know exactly when it SHOULD have been repaired.....

Good advice, that. And here's a helpful page from the 'lubber's personal service manual regarding torque values; Tighten 'er down until you feel it give, then back off a quarter turn.  

[weasel01]

The source of the annoyong rattle is located exactly where the timing chain tensioner is located ..guess I'm gonna do that next.

I saw the kit listed earlier looks perfect.

Does motobins take forever?

[montmil]

I usually get my order from Motobins about five-six business days after I place the order. They ship via Royal Air Mail.   Monte

[Yikes]

So Amp,

Are you going to replace the while chain, or just the tensioner?  

[weasel01]

Long as I'm diggin' in that deep may as well go ahaed and do it to it and knock the whole thing out.

[weasel01]

Monte, Were the marks on the sprokets easy to see and line up?

Also any signs of sprocket wear?  what was the milage on your bike?

[montmil]

Were the marks on the sprokets easy to see and line up?

There's an easy view of a 'dot' on the larger camshaft sprocket. The mark on the crank sprocket "scratch mark" is near impossible to see with the bearing assembly in place, so... With the left-hand piston at TDC and the cam sprocket 'dot' at 12 o'clock... Clean the crank gear sprocket at the 6 o'clock and add a dab of white paint adjacent the cam sprocket dot..

... any signs of sprocket wear? what was the milage on your bike?

Wear was minimal. Crank sprocket rotates 2x vs cam srocket so the crank bit is wearing twice as fast. Mine was ok. Mileage? Quien sabe? Neg function on odometer -it's an R65, right- and PO may or may not have changed chain.

Resource and Supplier Links:
Motobins   <http://bmwmotorcycletech.info/timingchain.htm>
Snowbum   <http://bmwmotorcycletech.info/>
Matt Parkhouse   <http://www.airheads.org/content/view/211/98/>
Ray Brutti   <http://www.airheads.org/content/view/170/98/>

Post your "questions yet to be discovered". We'll all help you through this chore.   Monte

[weasel01]

Excellent, I'm going to order the t-chain kit from motobins today.
Should be here sometime next week which works out because I have to go to Nashville,Tn. Wed for the rest of the week.

[montmil]

Amp, Do you have a rotor removal tool? Long, bolt-lookin' thing?
http://www.motoelekt.com/newaltbolt.htm

[weasel01]

Guess I gettin' that thing today too! thanks!

[weasel01]

Timing chain kit from England on the way!