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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil chamber in lower rear of crankcase
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<blockquote data-quote="davidd" data-source="post: 28839" data-attributes="member: 1177"><p>John,</p><p></p><p>If you still have some concerns even after finding out that this chamber feeds into the oil pump, you might give Carleton a call. I think he drilled some holes to drain the oil in the racer, which is something that I have seen done to several hot motors. Obviously, the rate at which it drains cannot be too fast as it is the supply to the heads as mentioned. </p><p></p><p>I have had a problem with this chamber in the past. I have thought about drilling an oil drain plug so it can be drained. If there is a mechanical failure, like a big end, the chamber fills with metal particles and the best you can hope for is that they pump into the UFM. I installed a spin on filter prior to the UFM. I had another engine that had Castrol R in it and the R went moldy. I changed the oil five times (in quick succession)and the old R was still showing up. I would have thought that it would have cleaned itself much more quickly. The only sure way to clean it is to split the cases.</p><p></p><p>I should mention that there is a tiny grub screw that is usually staked in position near the oil pump that will drain the chamber, but it is too small to pass debris.</p><p></p><p>David</p></blockquote><p></p>
[QUOTE="davidd, post: 28839, member: 1177"] John, If you still have some concerns even after finding out that this chamber feeds into the oil pump, you might give Carleton a call. I think he drilled some holes to drain the oil in the racer, which is something that I have seen done to several hot motors. Obviously, the rate at which it drains cannot be too fast as it is the supply to the heads as mentioned. I have had a problem with this chamber in the past. I have thought about drilling an oil drain plug so it can be drained. If there is a mechanical failure, like a big end, the chamber fills with metal particles and the best you can hope for is that they pump into the UFM. I installed a spin on filter prior to the UFM. I had another engine that had Castrol R in it and the R went moldy. I changed the oil five times (in quick succession)and the old R was still showing up. I would have thought that it would have cleaned itself much more quickly. The only sure way to clean it is to split the cases. I should mention that there is a tiny grub screw that is usually staked in position near the oil pump that will drain the chamber, but it is too small to pass debris. David [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Oil chamber in lower rear of crankcase
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