Bone Stock
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I have an old style 212 cc predator modded with header, performance air filter, 1.3:1 ratio rockers, 22 lb springs, stock carb jetted .020 low/.035 high, stock cam and governor removed. It was putting out decent power and revving up around 5000 RPMs. It ran great for about 2 months but suddenly it began starting harder and lost a lot of low end power. It also does not rev out as high as it did before (revs about 4000 rpm now). Does anyone have any idea what could be causing this? I checked the plug and it was fouled so I installed a clean plug and it runs the same. Could this be bad gas? Has anyone else experienced anything like this before? Any comments, advice and recommendations will be greatly appreciated.