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Old 28th January 2010, 00:22   #46
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Originally Posted by Randhawa View Post
Ok lads got it sorted today. Culprit was the loose chain pad bolt. Bolt got loose, pad shifted outwards and the tensioner went straight to the chain. Chain made a groove on the tensioner but that wont be a problem now. Got the sprag changed and now it's back to all smiles for now.
Great to hear that. Enjoy.

Rennjit,

The sprag bearing had already fragged out.

Cheers,

Jay
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Old 28th January 2010, 00:50   #47
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^ means noise was from tensioner-chain rubbing or rather grating? if so why change sprag . good that is back
The scary noise was from the tensioner touching the chain without the pad in between + bearing noise. I used the ES in the morning and it spun few times so got that changed.

@Jay- Ron was saying the cams look like some HD model. The reason behind that is that RE is sourcing cams from the same vendor which HD is using. High quality stuff

Got to know small thing today about the compression on C5. It should be +- 100 PSi, anything above 110 then engine needs decarbonizing.

My one big issue still remains, the piston knock. The day it gets sorted, I'll be really happy.

Did you hear the noise from the link I provided?
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Old 28th January 2010, 10:42   #48
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Originally Posted by Randhawa View Post
the piston knock.
WHOA!!! Are you sure its piston knock?

Could be knocking.

Last edited by Spitfire : 28th January 2010 at 10:46.
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Old 28th January 2010, 13:18   #49
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I cant be 100% sure but if it was knocking then I will hear it all the time. Knocking is more pronounced during acceleration at all times.
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Old 28th January 2010, 13:27   #50
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Ok some bit of technical jargon to be cleared.

Piston slap is the right word not knock.

Quote:
if it was knocking then I will hear it all the time.
I didnt get it. You hear it all the time or only during accelration? And no knocking is not heard all the time, if it is then you need help.

Also some posts earlier it seems you are running lean (factory setting). It adds up it would be knocking and not piston slap. Since its a new engine i wouldnt think your piston/boe is a goner already.

Last edited by Spitfire : 28th January 2010 at 13:28.
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Old 28th January 2010, 13:44   #51
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Piston slap is when the piston slaps around the bore right?.

I classify piston knock to the play in gudgeon pin between the piston and the connecting road.

I hear it on sedate acceleration and on partial load. Sudden acceleration and it's gone or above 60km/h. If you download the audio file I posted in Pg 3 then you might get a clear picture.

I am not sure if the bike was ever running lean due to the fact that I had black plugs and black smoke in the morning and also the bend turning pale in color where it joins the exhaust. Fuel consumption also went down. Now with a warmer weather for last two day, it has gone up by 5km/l. I have tried to compare the engine noise from other CL5 and they don't have it except the factory bike which RE had made to test in India. I have compared few TBTS with identical mileage and some of them had it too.
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Old 28th January 2010, 13:55   #52
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Originally Posted by Randhawa View Post
I classify piston knock to the play in gudgeon pin between the piston and the connecting road.
Now I'm curious to know, do you mean the gudgeon pin is loose in the connecting rod bush or do you mean it's loose in the piston or is it loose in both?
Regards
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Old 28th January 2010, 13:57   #53
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I classify piston knock to the play in gudgeon pin between the piston and the connecting road.
If thats audible then you need to get it checked immediately. Why do you think it would be that?

You checked the auto decompressor?
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Old 28th January 2010, 14:09   #54
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Quote:
Originally Posted by Randhawa View Post
Piston slap is when the piston slaps around the bore right?.

I classify piston knock to the play in gudgeon pin between the piston and the connecting road.

I hear it on sedate acceleration and on partial load. Sudden acceleration and it's gone or above 60km/h. If you download the audio file I posted in Pg 3 then you might get a clear picture.
You're right.

Piston Slap = excessive clearance between bore and piston.

Knocking/Pinging = detonation.
Its this knocking/pinging you're hearing when you sedately accelerate under load. This is bad for the engine. Drop a gear and accelerate. It happens if the engine is set to run lean.
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Old 28th January 2010, 14:24   #55
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Originally Posted by Spitfire View Post
If thats audible then you need to get it checked immediately. Why do you think it would be that?

Reasons;
Knocking is more sharper(metallic) and the knock on mine is muted knock
No misfiring or hesitation.
No black or white smoke after engine warms up for 2min.
I just get the feel as if something is loose.
If anything to do with the valve terrain the some loss of power should be there.
Have heard the same noise on some four stroke bikes with high mileage and it's mostly due to the excess play in the connecting road and the piston pin.


You checked the auto decompressor?
Not yet but RE engineer rules it out

Reasons;
No loos in power
No ticking noise when running, the one you hear on cold startups


@Sankar

It's not that either.

Last edited by Randhawa : 28th January 2010 at 14:31.
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Old 28th January 2010, 14:31   #56
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Loose gudgeon pin sounds like tak..tak. Its a blunt sound.

Also a plug may look black but the bike might actually be running lean on very low to partial throttle openings and not so rich on mid to full open throttle. In this case the plug will not tell you about the lean condition that exists low in the throttle range. Might be fuel mapping issue (jets lovely jets ).
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Old 28th January 2010, 14:57   #57
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Its knocking. Unless my ears have given up on me. Down shift while accelerating.

The sound i heard: Around 17 secs you accelerate and again from 22 secs onwards and the deceleration.

Spend 15 minutes to find the headphones LOL.
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Old 28th January 2010, 16:02   #58
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Hmm, all this discussion about the issues with the CL 500 is got me thinking about whether I should actually go for one.
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Old 28th January 2010, 17:19   #59
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man ur bike sure seems to be facing a lot of issues. I hope I don't face too many niggles.
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Old 28th January 2010, 17:46   #60
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whether I should actually go for one.
Quote:
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man ur bike sure seems to be facing a lot of issues. I hope I don't face too many niggles.
Nothing to get paranoid about.

And no I dont work for RE.
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