hi I have 05 xr6t manual 6spd dyno only 245 rwkw std dunlop 235/45 tyres they appear to loose traction when car hits 3500rpm in 1st it revs very sharply to just off limiter(6400) are better tyres or different shocks or springs or is it the clutch going dyno showed a year ago 570nm torque any feed back appreciated clutch appears ok