gomey68 Posted November 15, 2009 Report Share Posted November 15, 2009 Hi, Any one got any comparisons, recommendations or opinions on the big bore kits available for the 4RT? e.g, S3, HRC, etc. Thanks,,, Quote Link to comment Share on other sites More sharing options...
barfy Posted November 15, 2009 Report Share Posted November 15, 2009 Perhaps someone can confirm, but I was told be a good Over 40 national rider in the UK that you need to replace the head if you put on a 300cc cylinder because it doesn't clear the fuel properly. I'd be interested in the answer because I'm looking at a 280 kit, but not sure what would be best. Quote Link to comment Share on other sites More sharing options...
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