Head
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You misunderstood me, this is just a picture for reference. On mine scratches are on the exhaust side. : )
And what about the exaust pipe? -
@killersbeez Sorry mate, I am busy doing something at the same time lol.
Yeah, if it's worse than that then it needs a replate.
I still think it's unlikely that something got into the exhaust port, but I guess it really doesn't matter too much. What matters is what are your plans.
Again I don't know what benefits you will get, if any, of a 3MB over a 4FU. I think it's the complete package. If you got the barrel as well...
The head must not have any pitting in it for it to be any good.
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Well here is a photo of the head -
Yea, I know that You need the full package but i will get it eventually. -
@killersbeez Yes mate. Clean head.
What size is the piston on the 4FU?
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It's standart bore, it is in pristine condition, not oval just the scores.
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@declan Detonation can cause this, this happens when the fueling isn't set up properly, causing the fuel to ignite before the piston reaches TDC, in other words without the spark plug igniting. This causes masses of problems as the force of the piston going up is met with the force of the explosion. Destroys bearings and pits the head.
A piston failure or debris will also cause pitting. But for tuners it's usually detonation.
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Are the barrels really plated? Which models is that? Could have sworn than mine was steel lined.
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@jens-eskildsen The 4FU's are nikasil plated.
But it's possible someone fitted a steel liner to the bore, since they can be rebored. PJME offer this service.
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Argh, roger, mine is a different model then, havent actually checked which one tho'
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Got this in the mail yesterday, pumped to get it on the bike when the domed piston comes. TBH it looks like it hasn't even been run lol
