That would be o.k. if I had metric nuts & bolts.In lieu of a allen wrench i would go int my nut and bolt box, find a bolt that the head of the bolt fits into plug. Double nut the threads of the bolt and insert the head of the bolt into the plug , loosen the plug with a wrench on the inside nut. Instant allen wrench.
It's a 14mm allen head, this applies for both the manual and auto versions of the 2000 / 2001 Sporty here, (just checked both, ripping the front down pipe off the parts Sporty -> installing on the 2000 daily driver..)
Back to work..