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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
MK1 carb tuning and BTH noise?
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<blockquote data-quote="Howard" data-source="post: 24726" data-attributes="member: 271"><p>I'm using Pazon. I have to say I'm suspicious of the timing mark, but based on how Pazon recommend setting the timing, it's now on 40 degrees.......... and I intend to try 42 when I can. Every time I advance the timing it seems to improve and 34 (if that's what it was) was very wrong. Peter Appleton is running 40, and that's what prompted me to go that high, but I've had no sign of pinging yet, and the old addage is when it pings, turn it back a degree.</p><p>Your carbs are probably in line with what I'm running. I worked out that 932s were about 25% more choke area than standard Shadow carbs so I started with a jet 25% bigger - 230, that seemed a bit weak so I'm on 240, and that seems near enough. I'd have tried 250, but I haven't got any, and the 260s I've got would probably be a bit high. Plug chops don't give much of a clue anymore, so it's down to easing the throttle down when pulling hard etc.</p><p> </p><p>H</p><p> </p><p>ps it runs nicely all through the range, docile and torquey at low revs and fairly rapid when the taps are opened.</p></blockquote><p></p>
[QUOTE="Howard, post: 24726, member: 271"] I'm using Pazon. I have to say I'm suspicious of the timing mark, but based on how Pazon recommend setting the timing, it's now on 40 degrees.......... and I intend to try 42 when I can. Every time I advance the timing it seems to improve and 34 (if that's what it was) was very wrong. Peter Appleton is running 40, and that's what prompted me to go that high, but I've had no sign of pinging yet, and the old addage is when it pings, turn it back a degree. Your carbs are probably in line with what I'm running. I worked out that 932s were about 25% more choke area than standard Shadow carbs so I started with a jet 25% bigger - 230, that seemed a bit weak so I'm on 240, and that seems near enough. I'd have tried 250, but I haven't got any, and the 260s I've got would probably be a bit high. Plug chops don't give much of a clue anymore, so it's down to easing the throttle down when pulling hard etc. H ps it runs nicely all through the range, docile and torquey at low revs and fairly rapid when the taps are opened. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
MK1 carb tuning and BTH noise?
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