a4gom
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| posted on 9/9/11 at 12:34 PM |
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Yamaha R1 5VY Engine
It's a replacement for my existing one so don't need loom, throttle bodies etc
What ya got?
Andy
Perfect planning prevents pi$$ poor performance!
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ko_racer
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| posted on 9/9/11 at 03:13 PM |
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What's up with your current engine, I've got lots of spares if you need anything.
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a4gom
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| posted on 9/9/11 at 07:53 PM |
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Waiting for the verdict but it died at Tycroes at the weekend, think I need some stronger valve springs. I suppose we'll never know but my
guess is the valve springs are a bit weak and can't keep up with the cam when held on high rpm for too long? Like I said haven't got the
head off yet but I had 1-1/4" of exhaust valve stem in the manifold and you could see a couple of bent stems on the inlet valves so I reckon
it's dropped an exhaust valve in the pot. I was free-wheeling back down pit lane when it happened on tick over so hopefully the damage
won't be so bad.
I had a similar indecent earlier in the year but was lucky then as the shim trapped the collet in such a way that the valve only dropped a fraction
and held in place, far enough to take the carbon of the top of the piston but not cause any damage.
I might be in touch once I know whats needed.
Thanks
Andy
Perfect planning prevents pi$$ poor performance!
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