Dave Johnson and Guy Martin will be riding for Smiths Racing Team for the 2015 TT.
Australian Johnson, who came fourth in last year's Superstock race, will ride a Smiths BMW in the main solo races this time around.
Both Johnson and Martin will contest the two Supersport races on a 675cc Triumph Daytona for the Gloucester-based team.
This will be the first TT that Martin has ridden a British-built bike around the circuit.
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