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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
B cylinder oil hole vs C cylinder oil hole
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<blockquote data-quote="greg brillus" data-source="post: 54141" data-attributes="member: 597"><p>Craig, do not put restrictor discs in......find yourself a small countersunk screw and cut off the shank/thread area so that you have JUST the countersunk part left. This should be as good a FIT into the hole as you can, and even slightly smaller than the total hole area in size. Clean up the tapered hole area thoroughly with some emery tape/sand paper, until the hole is very clean and bare metal, scuffed up. Then mix up a small amount of Devcon or similar metal epoxy compound, and put some in the hole followed by the small countersunk screw head, then smear some more of the epoxy over the area. Wipe off the excess particularly on the inside of the liner. Even if some oozes out through into the bore area, you can scrape off the piece once it has dried. Make sure nothing is protruding on the outside as well. Once dry you can lightly sand the inner/ outer areas to finish off. Redrill a new hole alongside the original one biasing it closer to the timing side....as you know that the feed gallery is plenty wide enough to allow this. Just make sure that when you are finished that the feed hole entering the bore is BELLOW the lowest ring/ oil control ring. It only needs to clear it by 0.5 mm or preferably a bit more. It takes less time to do this than to explain......Its really not that hard, at all. This will cure your over oiling problem.......Cheers........Greg. PS make sure the bore has a good hone cross hatch pattern to assist the rings in bedding in......<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 54141, member: 597"] Craig, do not put restrictor discs in......find yourself a small countersunk screw and cut off the shank/thread area so that you have JUST the countersunk part left. This should be as good a FIT into the hole as you can, and even slightly smaller than the total hole area in size. Clean up the tapered hole area thoroughly with some emery tape/sand paper, until the hole is very clean and bare metal, scuffed up. Then mix up a small amount of Devcon or similar metal epoxy compound, and put some in the hole followed by the small countersunk screw head, then smear some more of the epoxy over the area. Wipe off the excess particularly on the inside of the liner. Even if some oozes out through into the bore area, you can scrape off the piece once it has dried. Make sure nothing is protruding on the outside as well. Once dry you can lightly sand the inner/ outer areas to finish off. Redrill a new hole alongside the original one biasing it closer to the timing side....as you know that the feed gallery is plenty wide enough to allow this. Just make sure that when you are finished that the feed hole entering the bore is BELLOW the lowest ring/ oil control ring. It only needs to clear it by 0.5 mm or preferably a bit more. It takes less time to do this than to explain......Its really not that hard, at all. This will cure your over oiling problem.......Cheers........Greg. PS make sure the bore has a good hone cross hatch pattern to assist the rings in bedding in......:). [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
B cylinder oil hole vs C cylinder oil hole
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