Topic-icon Ek Het Groot K@k

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6 years 1 month ago #88669 by KarlSouth
Replied by KarlSouth on topic Ek Het Groot K@k
You mean that spring device on the exhaust cam? If so mine does not have them fitted.

KLX 250, CRF230F, F800GS, 2008 KLR650

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6 years 1 month ago #88670 by DOCTOR KLR
Replied by DOCTOR KLR on topic Ek Het Groot K@k
Ok,it could be BAD NEWS then???
Exhaust Cam journals could be damaged?
You need to strip and see?

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6 years 1 month ago #88671 by KarlSouth
Replied by KarlSouth on topic Ek Het Groot K@k
I will check it out and post the findings.

KLX 250, CRF230F, F800GS, 2008 KLR650

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6 years 1 month ago #88678 by KarlSouth
Replied by KarlSouth on topic Ek Het Groot K@k
took off the top cover and measured the valve clearances.
Inlet Exh
.35 >.5 or 0 (mm)
.30 .25 (mm)

I guess that means 3 are bent?

I removed the cams and looked around the top can not see any visible damage.

KLX 250, CRF230F, F800GS, 2008 KLR650

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6 years 1 month ago #88679 by capeklr
Replied by capeklr on topic Ek Het Groot K@k
Was the engine still running?

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6 years 1 month ago #88680 by KarlSouth
Replied by KarlSouth on topic Ek Het Groot K@k
I have not started it again since I heard the noise, I assume it will not start again

KLX 250, CRF230F, F800GS, 2008 KLR650

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6 years 1 month ago #88684 by Piet
Replied by Piet on topic Ek Het Groot K@k

took off the top cover and measured the valve clearances.
Inlet Exh
.35 >.5 or 0 (mm)
.30 .25 (mm)

I guess that means 3 are bent?

I removed the cams and looked around the top can not see any visible damage.


I'm not an expert, but I don't think you can deduce from those clearances whether a valve is bent.

Perhaps the previous mechanic just set the clearances too big? Clearances like those will definitely be noisier than normal, but it shouldn't cause a loud clunk noise - only an extra whirr while the engine is running.

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6 years 1 month ago #88686 by capeklr
Replied by capeklr on topic Ek Het Groot K@k

I have not started it again since I heard the noise, I assume it will not start again


So the engine was running until you heard the noise. I don't think that bent valves are your problem.
Yes the clearance are out, but not to much.
How was the valve timing?

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6 years 1 month ago #88687 by KarlSouth
Replied by KarlSouth on topic Ek Het Groot K@k
The valves where set correctly back in 2013 when I had the motor rebuilt. Since then I have done 15000km. The valve timing was slighty out meaning that I have to turn the crank approx 1 cm to get the "t" to align with the notch with the cam arrows level with the head surfaces. i have corrected this alingment since but the noise is still there.

What concerns me is that the left exh measures no clearance. Is there another way that i can make sure the valves are bent or not? I really do not want to take the head off unless its totally necassary.

KLX 250, CRF230F, F800GS, 2008 KLR650

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6 years 1 month ago #88688 by capeklr
Replied by capeklr on topic Ek Het Groot K@k
If the left exhaust has no clearance then you must fit a thinner shim to get clearance again.
I very much doubt that your valves are bent.
I would drain the oil and pull off the left side engine covers and flywheel.
Drain the oil into a clean container and look for any metal bits.

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