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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Ditch the ESA ?
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<blockquote data-quote="greg brillus" data-source="post: 126257" data-attributes="member: 597"><p>Interesting........You also need to remember that the ESA was designed to handle a certain amount of torque/shock load from a given engine specification...........Now we all know that these engines can vary a huge amount. So the basic 998 cc power unit gave about 45 HP at a certain rpm's........So what could possibly happen when we go to a 1330 cc High compression engine that supposedly puts out near 100 RWHP.........Oh and instead of a kick start it now uses a reduction starter off a Harley.........So how is the production ESA able to handle that.......Quite simply, it can't........That is why when you observe one in action with the primary cover off, you can see first hand the ESA goes to full travel either way from cranking to engine firing up. By stiffening up the action of the ESA this makes it function much better, although I feel it would be better with either a better design or removed (no crank shock absorber) and a cush drive used in the rear hub. On a soft engine combination you might get away with nothing as Vic suggests, but on a larger more tuned engine, it is a must, or else you will damage and break something........Those rear hub bolts and more so the ten 1/4 BSF bolts clamping the rear sprocket to the drum will probably fail.</p></blockquote><p></p>
[QUOTE="greg brillus, post: 126257, member: 597"] Interesting........You also need to remember that the ESA was designed to handle a certain amount of torque/shock load from a given engine specification...........Now we all know that these engines can vary a huge amount. So the basic 998 cc power unit gave about 45 HP at a certain rpm's........So what could possibly happen when we go to a 1330 cc High compression engine that supposedly puts out near 100 RWHP.........Oh and instead of a kick start it now uses a reduction starter off a Harley.........So how is the production ESA able to handle that.......Quite simply, it can't........That is why when you observe one in action with the primary cover off, you can see first hand the ESA goes to full travel either way from cranking to engine firing up. By stiffening up the action of the ESA this makes it function much better, although I feel it would be better with either a better design or removed (no crank shock absorber) and a cush drive used in the rear hub. On a soft engine combination you might get away with nothing as Vic suggests, but on a larger more tuned engine, it is a must, or else you will damage and break something........Those rear hub bolts and more so the ten 1/4 BSF bolts clamping the rear sprocket to the drum will probably fail. [/QUOTE]
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Tech. Advice: Series 'B' / 'C' 500cc/1000cc Bikes
Ditch the ESA ?
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