Information: The DT125R has the same engine as the TZR125 and goes very well
(mine did about 90mph). De-restriction is by turning the power valve
through 90 degrees (can be done with a normal socket or spanner.)
Don''t go every where at 90 or you''ll blow the engine up and need a
new piston and rebore . I was lucky and got a new engine for
£100 .