Rocker arm axles inner end play?

Your bike has them, all the bergs have these bolts that help hold the rocker box on, they are located on either side of your spark plug.

What you are talking about here is called "axial" play, and is indeed something that you need to set, AFTER, you have put the rocker box back on. Or, if your rocker box is still on and you just want to adjust them you can.

Remove the valve adjustment covers and the place the motor at TDC ON THE COMPRESSIOIN STROKE. Now, before you begin, grab hold of the rocker arm itself and push/pull it back and forth, parallel with the rocker arm shaft. You should feel some play here. Whilst sitting on the spark plug side, you should be able to slip a .05-.01mm feeler gauge between the end of the rocker arm and the aluminum end cap piece. Check the dimension in your owners manual to be sure, but, I'm pretty sure that's what it is.

If it is out of spec, then just loosen the bolt that looks like it passes through the rocker arm shaft, which it does via a slotted hole. If the dimension is too loose simply tap on the end of the rocker arm cap, if it's too tight just wiggle the rocker arm back and forth and it will get looser. Once you have the dimension set, simply re tighten the bolt per spec. Be careful not to overtighten!!

A thorough explanation can be had by downloading the 2001 owners manual, part #3, pages 9a & 9B

Smorgasbord said:

Froggie doesn't have them either. They'd be right under the 200228 figure if he had them. But his rocker cover is well vented on the other hand. I'm talking about radial play at the ends not clamped down by (the missing) bolts.

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Funny haha. :evil:

smorgy

what i do is turn those black plastic caps and tap them in with my toffee hammer at the same time. they're on the right hand end. do this until the rocker cover bolts will slip through. next = side play. if you don't have enough = lever the black cap back and out a bit. too loose? = tap the cap in a bit but with the cover bolts still in!

now mount the rocker cover and the bolts will just about knock or slip through again but this time to be tightened.

regards

Taffy

Smorgasbord said:

Froggie doesn't have them either. They'd be right under the 200228 figure if he had them. But his rocker cover is well vented on the other hand. I'm talking about radial play at the ends not clamped down by (the missing) bolts.

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There aren't any missing bolts.

What year bike do you have???

DaleEO said:

Smorgasbord said:

Froggie doesn't have them either. They'd be right under the 200228 figure if he had them. But his rocker cover is well vented on the other hand. I'm talking about radial play at the ends not clamped down by (the missing) bolts.

Click to expand...

There aren't any missing bolts.

What year bike do you have???

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I think he He is speaking of these holes (the ones inside my crude box...) But no model that i know of has bolts there that pass through to the top of the rocker cover.

Neither my old broken cover nor my new one have screws that go through either.

i don't have this stuff in front of me but don't both ends off the rocker shafts have these holes in them?

and therefore the bolts that you put in on the right hand side go down and through the shafts?

because the shafts have holes at either end they can therefore be turned around and turned over etc? am i the only one that checks for wear when dismantling them? and then turns them around?

pull yourselves together lads.

regards

Taffy

Taffy said:

i don't have this stuff in front of me but don't both ends off the rocker shafts have these holes in them?

and therefore the bolts that you put in on the right hand side go down and through the shafts?

because the shafts have holes at either end they can therefore be turned around and turned over etc? am i the only one that checks for wear when dismantling them? and then turns them around?

pull yourselves together lads.

regards

Taffy

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I don't think we are talking about the shafts themselves, i think the question was just regarding the use for the holes in the rocker cover (see pic) and if they were there for a purpose.

risky1 said:

the use for the holes in the rocker cover (see pic) and if they were there for a purpose.

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Hey chaps,

Lubrication.

The shafts need to fill up with oil so that the oil then passes through small holes in the inner shaft to the area between the inner shaft and the rocker shaft and you therefore end up with a lovely low friction plain bearing type thingy.

If you look closely at the photo you will notice the oil channel hole on the left hand side of the cover and its passage towards the rocker shafts.

Not bolts go in there.

And guess what Taffy, I always use to turn my shafts over too! I know, I need to get out more :wink:

Cheers,
Simon

Don't the newer bikes have lubricated rockers? If you take a picture of the block, would there be oil channels there?

Taf, it took me a sec to figure out what you were saying... The older heads only have holes in one end, I know that cause mine are on my desk, worn out. I thought I had a eureka moment when you said they'd be turned around, but then you said they had holes on both sides. I wonder if those will also work on the older bikes?

-Parsko

Hi all,

Just remember- DR Cs bike uses a one of hand built cylinder head, hand built rockers with 14mm shafts instead of 12mm ones so my guess is the inner rocker shaft bolts by the timing chain are a custom addition too.....

I know my bike definetly only has the 2 outer ones.

I understand the early pressure fed rocker cover has 7 bolts- 2 through the rocker shafts.

The later (04) on rocker cover with RFS style (splash fed) rockers has 8 bolts- 3 through the rocker shafts.

And DR Cs has 9 bolts- 4 through the rocker shafts.

Correct me if I am wrong please.

Hi
Could someone tell me what year model this engine is and its capacity
Cheers

Could someone tell me what year model this engine is and its capacity

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??????????????????
more information, please :roll:

ned37 said:

Could someone tell me what year model this engine is and its capacity

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??????????????????
more information, please :roll:

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Hi
info is at top of thread with the authors original info
Cheers

Just remember- DR Cs bike uses a one of hand built cylinder head, hand built rockers with 14mm shafts instead of 12mm ones so my guess is the inner rocker shaft bolts by the timing chain are a custom addition too...

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i guess that would depend on when dr c made it... it's a one off cover. and could be anywhere from a 400 to a 650.