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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Blind jetting
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<blockquote data-quote="ClassicBiker" data-source="post: 96849" data-attributes="member: 1632"><p>I did a set of Mikuni slides awhile back. Decided that the guide pin slot center plane was perpendicular to the center line of the cut away and was on center of the slide. Worked out where the bottom plane of the guide slot was compare to the center of the slide, that became my rotation stop. Then measured where the cut away plane crossed the end of slide plane. Measured how far down the current cut was from the end and how much more I needed to be to make a 3 from a 2.5. Trigged out how much I needed to angle the sine plate such that a flat cut would cross the end at the same point. Zeroed on the high point at center of the slide and took very shallow cuts. Deburred with a swiss file and checked by sliding an imperial drill under the cut way, just a light drag and no lift. Unfortunately the clamping ever so lightly distorted the slides from round so I gave a few gentle taps with a raw hide while I held them in my hand. Then they slid down the bores under their own weight. If I were to do this again I would make a holding that retained them either through the needle hole or a finger on the back side.</p><p>Reason I did it was, Mikuni VM28 round slides only go to 2.5 cut away. Mikuni would make me 3's on special order at $40 a slide, minimum order 10 slides.</p><p>Showed all this to Dave Matson one evening at our monthly section meet. He looked at me and said "I just mark them with a pencil and file 'em."</p><p>Steven</p><p></p><p>[ATTACH=full]22567[/ATTACH][ATTACH=full]22568[/ATTACH][ATTACH=full]22566[/ATTACH]</p></blockquote><p></p>
[QUOTE="ClassicBiker, post: 96849, member: 1632"] I did a set of Mikuni slides awhile back. Decided that the guide pin slot center plane was perpendicular to the center line of the cut away and was on center of the slide. Worked out where the bottom plane of the guide slot was compare to the center of the slide, that became my rotation stop. Then measured where the cut away plane crossed the end of slide plane. Measured how far down the current cut was from the end and how much more I needed to be to make a 3 from a 2.5. Trigged out how much I needed to angle the sine plate such that a flat cut would cross the end at the same point. Zeroed on the high point at center of the slide and took very shallow cuts. Deburred with a swiss file and checked by sliding an imperial drill under the cut way, just a light drag and no lift. Unfortunately the clamping ever so lightly distorted the slides from round so I gave a few gentle taps with a raw hide while I held them in my hand. Then they slid down the bores under their own weight. If I were to do this again I would make a holding that retained them either through the needle hole or a finger on the back side. Reason I did it was, Mikuni VM28 round slides only go to 2.5 cut away. Mikuni would make me 3's on special order at $40 a slide, minimum order 10 slides. Showed all this to Dave Matson one evening at our monthly section meet. He looked at me and said "I just mark them with a pencil and file 'em." Steven [ATTACH=full]22567[/ATTACH][ATTACH=full]22568[/ATTACH][ATTACH=full]22566[/ATTACH] [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Blind jetting
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