I've got to disagree with n578md, at the risk of messing with someone from Texas! I don't think you should continue using a motorcycle tire that has been plugged. If n578md managed to do it with four plugs, the gods were with him. General practice as long as I have been riding has been to replace the tire asap. You only have two tires on a bike, so it's not like a car where if the plug is in the right place, you can ride on it. Sure, you may be able to get away with it and avoid an expensive replacement tire, but it's not recommended. Dunlop specifically states :
"Dunlop recommends only permanent plug-patch repairs of small (maximum 1/4-inch diameter) tread area punctures from within the dismounted 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. Speed should not exceed 50 mph for the first 24 hours after repair and the repaired tire should never be used over 75 mph."
In the Motorcycle Tips & Techniques Safety Forum, Jim Davis states:
"Here are a few things you might consider about tire plugs:
1.Almost any single puncture (thru the tread) can be repaired by the use of a tire plug. (I would be willing to ride with a properly {from the inside} plugged tire anytime.)
2.You cannot put more than one plug within the same quadrant of a tire - safely.
3.You cannot put more than two plugs into a tire - period.
The manufacturers of tire plugs specifically disavow the safety of doing either of the last two items listed above. They also void their speed warranties as a result of any tire plugging. Your tire is probably marked with an 'H' speed designation, meaning it is rated for safety up to 130 MPH. If you have even one tire plug in it you should not drive faster than about 80 MPH using that tire."
Tire Plugs
So you may be able to have the tire plugged from the inside, but the speed rating will be cut significantly. Would I put my butt on a bike with a plugged tire. No way. I'm worth way more than that.
Deborah