Timing chain issue?

[Leendert]

Guys look at this FZS with an R3 reflash and less than 10 hours on it.
Do you see the wear on the cams next to the oiling holes.

[Guidoo]

The black line around the journals? Mine had them also @31hrs. The saddles looked ok. I didn't worry about it.

[Leendert]

The black line around the journals? Mine had them also @31hrs. The saddles looked ok. I didn't worry about it.

Yes those.
I do worry about them cause I had my cams jam up in my personal ski before.

[kwtony]

What were the clearances on them, have you plastiguaged them at proper torque specs?

In a NASCAR engine, rules limit the minimum diameters of the rod and main journals on the crankshaft. The rods are 1.850? in diameter while the mains are 1.999?. Most of these engines are running rod and main bearing clearances of .001? or less, and they are doing it with low viscosity racing oils such as 0W5, 0W30 and 0W50. These racing oils are as thin as water and are highly friction modified. One of the disadvantages of closer bearing clearances is that it can increase both bearing and oil temperatures. That’s no problem as long as the bearings and oil can handle the heat, but if they can’t it increases the risk of lubrication breakdown and bearing failure. That’s why high quality synthetic motor oil is absolutely essential if you are building an engine with tighter than normal clearances.

[Leendert]

We will clean everything up and then plastiguage them.
But this is a brand new ski I shouldn't have to platiguage them!!

[kwtony]

I agree with 1000000% but you have it apart for a reason. Might as well ensure that it wont happen or get worse in the future. Rock on!