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July 8th, 2017, 11:20 AM   #1
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I Ride: FS650 02 mod, Honda Cr125 92 mod, Yamaha Raptor 350 06 mod
Which way do the piston ring face??

Should the ring be with the chamfered side up or down? 650 02 model
Got confused when my old piston had it pointing down, and my new(used) have that side up...

Andreas
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July 8th, 2017, 12:03 PM   #2
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I Ride: when I can which isn't often enough. FX450, FE570
Bevels, markings face up.

Make sure end gaps are staggered.
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July 9th, 2017, 01:16 AM   #3
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July 9th, 2017, 07:06 AM   #4
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I Ride: FS650 02 mod, Honda Cr125 92 mod, Yamaha Raptor 350 06 mod
I have just started to assemble the engine when i came across this oil nozzle in the crank to the big end. I wonder why it don't have a bigger hole in it? If i understand this right, this is just "pressurized" by the oil bath in the left side? Or will it be a kind of vacum in the crankcase that will help throw oil in to the rod?

Appreciate all answers from a Berg newbie
Andreas
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July 10th, 2017, 01:27 AM   #5
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Hi

Bigger hole = less pressure


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July 10th, 2017, 09:30 AM   #6
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I Ride: FS650 02 mod, Honda Cr125 92 mod, Yamaha Raptor 350 06 mod
Okay, kept it original

Another question! When i installed the main balancer shaft with all new skf 61905 bearing in the crankcase, i noticed that i could "wobble" the shaft around when holding the end.
The waterpump bearing will help a lot and make the shaft stable, but i think it could be a weak spot

Since it was my balancer shaft bearing that fu#ked up and spitted out the balls, and made me do this full rebuild, i'm considering upgrading that one. Anyone who has done a other type of bearing on the balancer shaft? Stronger, wider?

Andreas
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