Here's what Dunlop has to say about tire repair from their web site;
Can I Have My Motorcycle Tires Repaired?
Some punctures in motorcycle tires can be repaired if no other damage is present. Dunlop recommends only individual permanent plug-patch repairs of small tread area punctures from within the demounted tire by a qualified tire repair shop or motorcycle dealer. Never perform an exterior repair and never use an inner tube as a substitute for a proper repair. Your bike should not exceed 50 mph for the first 24 hours after the repair and the repaired tire should never be used over 80 mph. Dunlop speed ratings are voided by repairs.
No form of temporary repair should be attempted because secondary damage caused by the penetrating object may not be detected and tire or tube deflation may occur at a later date.
Dunlop does not recommend the use of liquid sealants. These are a form of temporary repair which may adversely affect ply material and mask secondary damage caused by the penetrating object. Reliance upon sealants can result in sudden tire failure and accident.
