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Discussion Starter · #1 ·
Hi guys,
I decided to remove the decompressor,
and try,
I start listen din din din,
tryed tensioner cam chain, but no solve,
so remove all the head of the engine,
valve cover,
and cam.
Rocker arm, the side of the decompressor,
is in excellent condition,
the intake not very good,
the second rocker of the exhaust, not very good.
I can imagine low level of oil.
For remove the decompressor I have simply press the camshaft, right ?
 

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i'll be surprised if it will even roll over with out decompressor
 
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Discussion Starter · #3 ·
i'll be surprised if it will even roll over with out decompressor
at the end i decided no remove it and find a surprise....
cleaning the decompressor ( full of black oil) i see the spring that work correctly, and i start think not possible however, decompressor can make that sound,
so, playing whit cam,
finded a terrificant evidence!

WHEN WE DO VALVE CLEARANCE SETTING at Tdc

DECOMPRESSOR IS ACTIVATED, IF IT WORK CORRECTLY

AND SO, THAT VALVE WILL HAVE NOT 0,20
BUT ABOUT 1 MM OVER, 1,2
AND SO CLAC CLAC CLAC

I think that, also confirmed by italian forum of dominator 650, but however I am still reassembling all, will be the next engine starting to talk!

to be sure enabling decompressor when we do valve setting need to use a screwdriver to push the opposite side of decompressor, and the lobe which get rocker arm will be lower soon.



:oops::cautious::cautious::cautious::cautious:
:unsure::sick::sick::coffee::rolleyes:
 

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Discussion Starter · #4 ·
yeah, now after valve setting engine is very quiet, cause noise was rocker arm consumed, due to low level oil I think.
So every ride before turn off engine I wait 5 minutes, without accelerate and check oil because this quad drink oil !!!
 

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the XX are notorious for destroying rocker arms . lack of oil could be part of it . get the new rockers hardened . IMHO its honda's fault for starving the cam of oil .
 

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Discussion Starter · #6 ·
the XX are notorious for destroying rocker arms . lack of oil could be part of it . get the new rockers hardened . IMHO its honda's fault for starving the cam of oil .
Exactly,
but I am not convinced that a Honda engine can have this defect,
I came to the conclusion that the nut under the camshaft,
it does not always have an airtight seal
and the oil that should remain like a small lake
under the cam
could drain into that nut!
And therefore faster wear.
Maybe I'm wrong,
but I had 10w30 oil,
when I touched it,
under the camshaft,
the oil has disappeared under my fingers,
(I was looking for metal shavings)
So I sealed it,
changed two rockers,
and reassembled everything,
took a test drive,
and then disassembled the valve register window again,
to see if oil under the cam was up to the maximum possible level,
and it was all ok,
lake full of oil,
of course I check now,
after each ride with XX
oil level,
also, i am using royal purple,
that in some tests done by private
it actually seems to be quite better as anti-wear.
Furthermore,
maybe I made a mistake,
but I also removed the thermostat,
and the oil tends to remain the same color,
does not immediately go black !!!!
 
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