u/SuperGuttermouth

Today I adjusted my valve clearance on my 2004 Honda CBF600N. The bike has around 15.000 miles on it.

I marked the position of a tooth in each sprocket and marked the corresponding chain link so all would go back together easy. And ofcourse hold the chain up when the camshafts were out of the engine.

After adjusting and putting the cams back, torqing everything down and mounting the camchain tensioner back on and turning the engine for about 6 full revolutions I checked the timing. I can't get the intake sprocket mark to run parallel to the valve cover mounting surface. It's retarded about 1 to 2 millimeters, while the camshaft and exhaust cam sprocket marks are spot on.

When measuring the clearance I didn't pay too much attention to the precise position of the timing marks becouse a few degrees would not impact the measurement. So I don't know if this was already the case before the valve adjustment.

I tried advancing the intake sprocket 1 tooth but then the mark sits clearly to high above the mating surface.

When continuing to turn the engine to get both cam marks precisely the same, the mark on the crankshaft slightly misses the indent in the cover(last picture).

What could be the case here? Is it simply chain wear, or the accumulation of all kinds of tolerances? I'm not the first owner so I don't know of the head has been decked or something. Then again, I bought the bike with low milage and the bike always ran excellent for years.

Thoughts?

Ik heb zojuist de klepspeling afgesteld van mijn 2004 honda cbf600n en heb de nokkenassen teruggeplaatst. De tandwielen zijn niet van de nokkenassen af geweest.

Nu met controleren van de timing valt me op dat de intake nokkenas net niet helemaal parallel staat met de kop. Het lijkt ongeveer een halve tand van het nokkenastandwiel te zijn.

Tijdens het controleren van de klepspeling heb ik niet zo nauwkeurig gekeken als nu, dus of dit al was weet ik niet. Wel had ik de ketting schakels en de nokken die daarin vallen van de nokkenastandwielen gemarkeerd voor de demontage, dus ik ben er vrij zeker van dat de ketting op dezelfde plek van de tandwielen is teruggezet.

De kettingspanner is teruggezet na plaatsen van de nokkenassen.

Als ik de nokkenassen precies parallel zet dan verloopt uiteraard de markering op de krukas iets. Dit is de laatste foto. Als ik de inlaatnokkenas een tand met de klok mee verzet dan is dit overduidelijk te veel.

Is dit simpelweg ketting slijtage/rek of zie ik iets over het hoofd?

I've got a 2004 Honda CBF600n with about 15k miles on it. I just did a valve adjustment and removed the camshafts. After putting everything back together I can't seem to get the timing marks to line up 100%.

Exhaust cam is on tje exhaust side, intake on the intake side, the sprockets on the cams were not removed.

After getting the camshaft indicator to line up with the indent the exhaust mark is pretty much spot on, but the intake mark stays behind just a little bit, not a tooth but enough to make me question.

If I line the camshaft marks up perfectly level with the head, the line on the camshaft just misses the mark, again not a tooth in my oppinion. (Last picture)

Is this right or maybe a little chain wear/stretch.