Uploaded June 2020 | Updated September 2026, 2 weeks ago

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The 1999 Isle of Man TT Production Race turned into a Yamaha R1 battle as lap and race records were set. Iain Duffus led David Jefferies at the end of lap one by just 0.9 seconds with Phillip McCallen (now Yamaha-mounted) third. Duffus set a new lap record second time around at 121.32mph to lead Jefferies by 27.2 seconds, Griffiths taking third place from McCallen.

The Iain Duffus charge to victory ended at Cronk-ny-Mona on the final lap, leaving David Jefferies to take the chequered flag at a record 119.50mph by 25.7 seconds from Jason Griffiths with Phillip McCallen in third place.

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