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Old 02-22-2013, 05:31 AM   #6963
Studly Adventurer
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Joined: Aug 2007
Location: Idaho
Oddometer: 962
If you are thinking big bore, the largest I know of without doing major mods and using still using original sleeve rebored is the Wiseco 102.4. I ran one in my XL for many miles and years with no problems. I ran it with stock cam and springs etc. It made a noticeable difference in power, with no changes in mannerisms. As they say, there is no substitute for cubic inches.
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