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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Crankcase Joint-Prep and sealing
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<blockquote data-quote="1660bob" data-source="post: 37660" data-attributes="member: 366"><p>Hi All, thanks for the replies, always good to get other points of view before taking the plunge!! The Threebond 1215 i have is described thus:</p><p></p><p>"high performance silicone liquid gasket,excellent LLC (??) & gear oil resistance" and "OEM" approved,</p><p>The blurb on the pack claims that it replaces/supplements gaskets, remains flexible after curing, solventless-no shrinking post cure, no acetic acid, all of which are great.</p><p>Perhaps of more interest in crankcase application is that it offers:</p><p></p><p>"Excellent resistance to thermal shock, <u><strong>pressure</strong></u>-(now thats the one thing its gonna get in a 1000cc v-twin with iffy breather system and 60yr old cases!!) shocks,vibes, gasoline/oil/LLC (I still havent figured what that is yet?)and water".</p><p></p><p>I have seen this stuff marketed as "DucatiBond" with threebond 1215 on the same pack, and believe it may also be marketed as "Yamabond", probably others too.Given that such firms would not want any warranty issues with oil leaks, and costs of repairing such, I suppose they have done their tests and research prior to endorsement, so it should be pretty good stuff.</p><p> </p><p>I am trying to make the motor as oiltight as possible, as you would, but it may be a challenge- first Vincent, and i remember well the VOC Rally at the Manx Grand Prix a couple of years ago-by the end of the week there was so much oil on the pavement outside the Empress Hotel and surrounding pathways!-I saw one bike with a large ice cream container under it to catch it all when parked! It must have taken Douglas Corporation a week to clean it all up!!!!! <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> , Bob.</p></blockquote><p></p>
[QUOTE="1660bob, post: 37660, member: 366"] Hi All, thanks for the replies, always good to get other points of view before taking the plunge!! The Threebond 1215 i have is described thus: "high performance silicone liquid gasket,excellent LLC (??) & gear oil resistance" and "OEM" approved, The blurb on the pack claims that it replaces/supplements gaskets, remains flexible after curing, solventless-no shrinking post cure, no acetic acid, all of which are great. Perhaps of more interest in crankcase application is that it offers: "Excellent resistance to thermal shock, [U][B]pressure[/B][/U]-(now thats the one thing its gonna get in a 1000cc v-twin with iffy breather system and 60yr old cases!!) shocks,vibes, gasoline/oil/LLC (I still havent figured what that is yet?)and water". I have seen this stuff marketed as "DucatiBond" with threebond 1215 on the same pack, and believe it may also be marketed as "Yamabond", probably others too.Given that such firms would not want any warranty issues with oil leaks, and costs of repairing such, I suppose they have done their tests and research prior to endorsement, so it should be pretty good stuff. I am trying to make the motor as oiltight as possible, as you would, but it may be a challenge- first Vincent, and i remember well the VOC Rally at the Manx Grand Prix a couple of years ago-by the end of the week there was so much oil on the pavement outside the Empress Hotel and surrounding pathways!-I saw one bike with a large ice cream container under it to catch it all when parked! It must have taken Douglas Corporation a week to clean it all up!!!!! :) , Bob. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Crankcase Joint-Prep and sealing
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