The 58.5mm is the largest that will drop in. The big bore kit will not give you any more power unless the head and cam are changed. Your stock cylinder will only fill to 50% charge due to restrictions in the head and valve train. Your power gains will be in the head and cam, once this is done a big bore will enhance the power since you now are bringing in more air and fuel. Being your on a budget I would just go with a new piston/ring kit. Stay away from cheap and go quality, the benefits will outweigh the cost. Then instead of investing in a cylinder you don't need invest in a quality cam for this will increase power output noticeably. Any questions, feel free to give me a call 662-301-1563. I'll give you the best bang for the buck.
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