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Message: [QUOTE="helio lucas, post: 1214987, member: 78346"] the problem is if you bored too much the cylinder without any more mods is very likely to kill the top end of your bike, but i can assure you the engine in lower revs will be really fun... when you bore a cylinder you are increasing the displacement. ok, but also raise the compression ratio and limiting the breath of the engine... i agree with "2 strokes for life" about the air box and exhaust system... itá a good way to start with... a simple holes in the air box and jetting will lift power but the bike will make more noise from the intake system... [/QUOTE]