July 11, 201115 yr how does advancing or retarding the ignition affect the feel of the bike at low revs? thanks matt
July 11, 201115 yr Obviously a lot has to do with the bike and system, but overall, a slowing of the base timing will yield less kickback and prone to stalling, a smoother take off and associated reduction in top end performance. Forget trying to measure mm BTDC, it normally takes about 1mm rotation in advance rotation on the stator plate to make a change from stock, and about 2 mm on the retard side to make a difference. Any change here is setby feel of pants to pref, yet as a rule I would limit any advance to a mm or two, and decline to 5-6 mm, as anything out of this range gets too far out and other problems can occur. Obviously this is a very generalized statement, but the basics apply!
July 11, 201115 yr The best way to see how timing affects the engine is to blag a ride on an old P65er with manual advance/retard control on the handlebars and feel and listen to how the engine changes as you move the lever.
July 11, 201115 yr Author im planning to go practicing and try moving the stator plate to a few different positions. is it safe to try moving it from one extreme to another. hopefuly this will give me better understanding of its effect.
July 11, 201115 yr Mattloyd50 You asked "Is it safe to move the stator plate from one extreme to another" ? In a word.... NO! Over advancing the timing will eventualy lead to detonation, high cylinder temps and worst case melted pitons. Everything in moderation, ignition timing needs a gently gently approach. Advance = Sharper throttle response, more power (temp limited), harder starting... beware temp, detonation, jetting changes Retard = smoother throttle response, duller power, cooler temperatures, reduced fuel consumption...beware jetting changes, going to far Dom
July 11, 201115 yr Author Advance = Sharper throttle response, more power (temp limited), harder starting... beware temp, detonation, jetting changes Retard = smoother throttle response, duller power, cooler temperatures, reduced fuel consumption...beware jetting changes, going to far Dom thanks dom. thats what i was hoping for.
July 11, 201115 yr Your SWM probably won't do this, but a piston port 2 stroke will frequently run backwards with timing retarded only a few degrees. It can be great fun!
July 11, 201115 yr This happened to my 320 Majesty back in the day, and no, it wasn't fun... I can still remember the feeling today - about 40 years later...
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