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Briggs Flathead / Re: How great is the 12.5 flat
« on: December 27, 2012, 02:04:49 am »
Best cheap modifications are a complete rebuild. put a arc connecting rod in,billet dog bone,new piston ,rins,wrist pin,gaskets,crank bearings if needed,port thr intake really good.and put a pipe nipple in the exhaust. maybe a mild cam if you dare .that with a flat slide mikuni carb will do pretty good.