Stock CDI's do have rev limits in them. However on a stock engine the only way to hit it is under no load conditions. Stock CDI's are also retarded to meet EPA. My 2004 Blade timming with stock CDI was 10deg. ATDC and some manufacturers run more retard on the 2007 and up. The new buggies that come with an EGR or Converter will sometimes run 2deg.-3deg. BTDC, this is why some buggies are quick out of the crate and some are dogs. When I rebuilt my sons engine I ran it on a stand with a stock CDI and could only pull 8300 RPM, but when I installed the performance CDI it went to 10,000RPM and would have gone higher. A heavy moded engine stroked, with larger displacement cam and head work will acheive up to 12,000 RPM, however a stock or slightly modified will not due to the lack of total output. TOM
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