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General Discussion
The Garage
Boyer Bransden air gap
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<blockquote data-quote="TFR Aussie" data-source="post: 746480" data-attributes="member: 31552"><p>I contacted Boyer and asked them about air gaps and if they knew how I could straighten their warped stator plate.</p><p>My question and their answer is below. Nothing about straightening the plate, just buy another.</p><p>PS I have no float in the shaft and 1mm +- .5mm clearance sounds like it may be a little bit critical...</p><p></p><p>I have one of your kits on my 1975 XS650 Yamaha and the stator plate has warped inwards and the magnetic rotor has started to hit the solder on the stator plate. I have put washers under the plate to space it out so it doesn’t hit but now have an uneven air gap. Speaking of which, what should the air gap be?</p><p>How can I straighten this?</p><p></p><p></p><p>Thank you for your inquiry.</p><p>Distance from the magnets to pins is usually around 1mm, +/- 50% is ok, the gap size is not critical, any uneven gap is averaged magnetically with this system. Check for any excess 'end-float' in the XS camshaft.</p><p>Any mechanical contact between the rotor and the plate's solder joints or pins should be corrected, using washers to pack the plate out is ok. </p><p>The stator plate can be supplied as a spare part if required.</p><p>XS650 Stator Plate part number is STA00157, £43.36 inc worldwide shipping (local taxes may apply).</p><p>Regards,</p><p>[ATTACH=full]216272[/ATTACH]</p></blockquote><p></p>
[QUOTE="TFR Aussie, post: 746480, member: 31552"] I contacted Boyer and asked them about air gaps and if they knew how I could straighten their warped stator plate. My question and their answer is below. Nothing about straightening the plate, just buy another. PS I have no float in the shaft and 1mm +- .5mm clearance sounds like it may be a little bit critical... I have one of your kits on my 1975 XS650 Yamaha and the stator plate has warped inwards and the magnetic rotor has started to hit the solder on the stator plate. I have put washers under the plate to space it out so it doesn’t hit but now have an uneven air gap. Speaking of which, what should the air gap be? How can I straighten this? Thank you for your inquiry. Distance from the magnets to pins is usually around 1mm, +/- 50% is ok, the gap size is not critical, any uneven gap is averaged magnetically with this system. Check for any excess 'end-float' in the XS camshaft. Any mechanical contact between the rotor and the plate's solder joints or pins should be corrected, using washers to pack the plate out is ok. The stator plate can be supplied as a spare part if required. XS650 Stator Plate part number is STA00157, £43.36 inc worldwide shipping (local taxes may apply). Regards, [ATTACH type="full" width="387px"]216272[/ATTACH] [/QUOTE]
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The Garage
Boyer Bransden air gap
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