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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
389 Monoblock questions
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<blockquote data-quote="vibrac" data-source="post: 178089" data-attributes="member: 60"><p>I am coming back to Monoblocks after a long time away with TT and GP carbs</p><p>I have 4 or 5 monoblock carbs stamped 389 followed by another number. 2 of them have good bodies and are 1-1/8" which is what I am looking for, however they have no jet blocks, the other 389's are either bigger or smaller bores and of course<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite4" alt=":mad:" title="Mad :mad:" loading="lazy" data-shortname=":mad:" /> they have jet blocks. do all 389 have the same jet block? my suspicion is they do since the slides seem to interchange.</p><p>Any specific instructions for removal of jet blocks? I seem to remember hot water came into the procedure.</p><p>new blocks are not available new jet block base gaskets are</p><p>There is also talk of 'stay up' floats are these the floats designed to work on the so called modern petrol?</p></blockquote><p></p>
[QUOTE="vibrac, post: 178089, member: 60"] I am coming back to Monoblocks after a long time away with TT and GP carbs I have 4 or 5 monoblock carbs stamped 389 followed by another number. 2 of them have good bodies and are 1-1/8" which is what I am looking for, however they have no jet blocks, the other 389's are either bigger or smaller bores and of course:mad: they have jet blocks. do all 389 have the same jet block? my suspicion is they do since the slides seem to interchange. Any specific instructions for removal of jet blocks? I seem to remember hot water came into the procedure. new blocks are not available new jet block base gaskets are There is also talk of 'stay up' floats are these the floats designed to work on the so called modern petrol? [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
389 Monoblock questions
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