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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modern Fuel & Ignition Advance
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<blockquote data-quote="BigEd" data-source="post: 94985" data-attributes="member: 161"><p>In the sixties I had a 350 DB32 Gold star and later fitted a DBD34 500 engine. I retarded a bit with the lever for starting but advanced it after it fired up. Like Bill I don't think I used the lever much once I was riding.</p><p>If your engine is pretty standard I don't think that you need to mess about with your ignition timing much other than maybe knock the advance back a few degrees to find a sweet spot. I've had a BT-H magneto with electronic advance on my Rapide for around 10 years. The advance characteristics aren't wildly different to what you will get from a <u>properly functioning </u>mechanical ATD. It has been dead reliable and provided 1st or 2nd kick starting (1st press of the button now<img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite1" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" />) for over 40,000 miles. I use whatever fuel that comes out of the pump and haven't noticed any problem with the inclusion of alcohol in the petrol. Depending on where you are in the world you may be using fuel with a higher alcohol content than the up to 10% we have in the UK so I can't comment on higher alcohol percentage fuels. If you have a modified engine then that may also be a different story.</p><p>I think if you have a <u>good</u> standard magneto then you shouldn't really have any trouble. The problem is that most original magnetos are no longer performing how they did when they were new. Even some newly rebuilt magnetos are not really that good or don't work properly for very long. The problem with many old bikes that the owner can't get to run right may be that they won't get their money out and buy a good ignition system whether it be electronic, coil and points or a <u>properly </u>refurbished standard magneto.</p></blockquote><p></p>
[QUOTE="BigEd, post: 94985, member: 161"] In the sixties I had a 350 DB32 Gold star and later fitted a DBD34 500 engine. I retarded a bit with the lever for starting but advanced it after it fired up. Like Bill I don't think I used the lever much once I was riding. If your engine is pretty standard I don't think that you need to mess about with your ignition timing much other than maybe knock the advance back a few degrees to find a sweet spot. I've had a BT-H magneto with electronic advance on my Rapide for around 10 years. The advance characteristics aren't wildly different to what you will get from a [U]properly functioning [/U]mechanical ATD. It has been dead reliable and provided 1st or 2nd kick starting (1st press of the button now:)) for over 40,000 miles. I use whatever fuel that comes out of the pump and haven't noticed any problem with the inclusion of alcohol in the petrol. Depending on where you are in the world you may be using fuel with a higher alcohol content than the up to 10% we have in the UK so I can't comment on higher alcohol percentage fuels. If you have a modified engine then that may also be a different story. I think if you have a [U]good[/U] standard magneto then you shouldn't really have any trouble. The problem is that most original magnetos are no longer performing how they did when they were new. Even some newly rebuilt magnetos are not really that good or don't work properly for very long. The problem with many old bikes that the owner can't get to run right may be that they won't get their money out and buy a good ignition system whether it be electronic, coil and points or a [U]properly [/U]refurbished standard magneto. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Modern Fuel & Ignition Advance
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