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I always though that was there to give a handy place to grind down when balancing the combustion chambers.And whats with the dimple near the spark plug hole on both?
not anti american, it's anti goverment.
By far we clearly have the most ****ed up and greedy goverment on earth.
And to help them we happen to be the most ignorant people on earth.
Better to be a little big and have no failures and cut weight somewhere else.:secret:Just for comparison, this is a pic of the 09 R1 cam chain vs. a HRC one out of a 07 1000rr. The HRC one is supposed to be stronger than their stock one. So when people talk about the weight of the new bike, this is the kind of stuff that makes the difference. This whole motor is just a tank, everything has been beefed up to take the crossplane uneven firing order and the high revs also. Just in case, the bigger one is the 09 R1 chain. The links themselves are also thicker.
Right, thanks very much for the mega-quick reply dielPlugs are LMAR9E-J. This is a comparo between the stock 09 R1 and the NGK racing plug.