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General Chat (Vincent Related)
Greg Brillus Racer
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<blockquote data-quote="greg brillus" data-source="post: 100213" data-attributes="member: 597"><p>So those flywheels are from the RTV days back in the 90's which had inner and outer counterweights to compensate for the Carillo rods and heavier pistons that those early 600 top end kits had. At the time when the crank was assembled I sent all the parts to Laurie Binns in Victoria who put it all together, and I remember he was a bit nervous about removing any of the counterweight in case it changed the balance factor too much. After I set it up and did my own calculations it turned out to have a balance factor of 89% Apart from a vibration at low engine speed the vibes would disappear as the rev's came up. It just shows how forgiving the engine is that the factor was out so much..........Ken Horner has now re-balanced it back to about 50% and this should make the engine much smoother. The only real defect within the engine was all the main bearing had to be replaced on account of corrosion/pitting on the outer races, and the two cam spindles showing signs of wear. The use of methanol and castor based oils is a magnet for moisture..........My only guess is that after I had my accident back in 2015 perhaps it was too long before I was up to servicing the bike, I am not really sure. The venting of the cases after a race event seems the most obvious remedy, changing the oil and rotating the engine periodically would definitely help too. It will be great to see how it all performs, as Phil has mentioned there are several changes we have made, and they all seem to be in the right direction. It should be back up and running within a week or so.........Cheers...........Greg.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 100213, member: 597"] So those flywheels are from the RTV days back in the 90's which had inner and outer counterweights to compensate for the Carillo rods and heavier pistons that those early 600 top end kits had. At the time when the crank was assembled I sent all the parts to Laurie Binns in Victoria who put it all together, and I remember he was a bit nervous about removing any of the counterweight in case it changed the balance factor too much. After I set it up and did my own calculations it turned out to have a balance factor of 89% Apart from a vibration at low engine speed the vibes would disappear as the rev's came up. It just shows how forgiving the engine is that the factor was out so much..........Ken Horner has now re-balanced it back to about 50% and this should make the engine much smoother. The only real defect within the engine was all the main bearing had to be replaced on account of corrosion/pitting on the outer races, and the two cam spindles showing signs of wear. The use of methanol and castor based oils is a magnet for moisture..........My only guess is that after I had my accident back in 2015 perhaps it was too long before I was up to servicing the bike, I am not really sure. The venting of the cases after a race event seems the most obvious remedy, changing the oil and rotating the engine periodically would definitely help too. It will be great to see how it all performs, as Phil has mentioned there are several changes we have made, and they all seem to be in the right direction. It should be back up and running within a week or so.........Cheers...........Greg. [/QUOTE]
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General Chat (Vincent Related)
Greg Brillus Racer
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