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| Chart Key | |
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Horsepower |
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Torque |
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CO% |
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As below plus needle jet replaced, modified OC-series needle & tuning (at 25% throttle opening) |
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Rebuilt engine with gas nitrided positive twist top ring, bronze valve guides, single point cut valve job, valve springs squared, detailed & shimmed to target seat pressures, throttle slide over-travel corrected, JD jet kit, and triple layer (stock filter, dust cover & filter skin) air filtration (at 25% throttle opening) |