What options for identifying a loud tic in left cylinder

[schrader7032]

If you're going to pull things apart, meaning cylinders are removed, you should probably take a look at the cam followers as well as the surface of the camshaft they run on. Just to make sure there's no obvious wear and tear.

[malmac]

If you're going to pull things apart, meaning cylinders are removed, you should probably take a look at the cam followers as well as the surface of the camshaft they run on. Just to make sure there's no obvious wear and tear.

Hi Kurt

At this point in time I am working on a full rebuild of an R51/3, including crankshaft, the lot. I am not going to dive into the R75 until I have some clear sailing ahead.

You probably are right.... but the timing is very poor at my end.


Cheers


Mal

[malmac]

Well it got the better of me.... I dived in.
Why?

Well following another look I thought, Oh the symptons suggest a bent camshaft or a camshaft with very bad wear.
So I popped the barrels off. One cam follower had a small speckle of pits, the other three very good.
Camshaft may be slightly bent by about .005mm, but at present I have not worked out a methodology for confirming that.

As best I can see the cam surfaces look serviceable.

So I am going to put in a new set of rings, replace the faulty cam follower and replace the front camshaft seal.
New parts on the way.
I have cleaned the heads, lapped in the valves (a little pitting on the exhaust valve seats.
A light grind and that looks spot on.

Then Im going to put her back together and ride with a rattle that will in due course require me to pull the camshaft.

Thought some who have followed the rattle question might be interested in progress.


Regards


Mal

[srankin]

Thanks for the update Mal, St.