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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Crankcase Joint-Prep and sealing
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<blockquote data-quote="greg brillus" data-source="post: 37617" data-attributes="member: 597"><p>The grey compound is Threebond Pt no 1215 is actually recommended for assembling gearbox's, but works fine on alloy crankcases with a good parting face, and the black is Pt no 1207B is a high temp silicone. These are both non solvent types (don't smell like vinegar) the black type is a bugger to wipe off your fingers.....I use a bead about the size of a match head all around the parting face on one side only, just pryer to finnal assembly, fit a hand full of through bolts fairly quickly to hold it all together with some tension, then with plenty of clean rags at hand...wipe off the excess around the outside, which will be minimal using the amount i described.....if you let it cure off (an hour or two later) you can actually peal off the small extruded length around the inner cases, easy on the gearbox, but use a long bit of rod or whatever on the crank area....thus removing any leftovers that may get into oilways later...this not really necessary, but preferable anyway.....don't forget to put some on the heads of the lower rear throughbolts before installation...cheers.....Greg.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 37617, member: 597"] The grey compound is Threebond Pt no 1215 is actually recommended for assembling gearbox's, but works fine on alloy crankcases with a good parting face, and the black is Pt no 1207B is a high temp silicone. These are both non solvent types (don't smell like vinegar) the black type is a bugger to wipe off your fingers.....I use a bead about the size of a match head all around the parting face on one side only, just pryer to finnal assembly, fit a hand full of through bolts fairly quickly to hold it all together with some tension, then with plenty of clean rags at hand...wipe off the excess around the outside, which will be minimal using the amount i described.....if you let it cure off (an hour or two later) you can actually peal off the small extruded length around the inner cases, easy on the gearbox, but use a long bit of rod or whatever on the crank area....thus removing any leftovers that may get into oilways later...this not really necessary, but preferable anyway.....don't forget to put some on the heads of the lower rear throughbolts before installation...cheers.....Greg. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Crankcase Joint-Prep and sealing
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