drprunty Posted April 14, 2009 Share Posted April 14, 2009 Have a 78 xs400. Are there any mods that can be done to make the engine produce more torque/hp? Maybe jet kits? Any links to sites or experiences anybody may have had would be great. Link to comment Share on other sites More sharing options...
Moderator drewpy Posted April 14, 2009 Moderator Share Posted April 14, 2009 already been discussed here Link to comment Share on other sites More sharing options...
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