Join Date: May 2004
Location: Toronto, Canada
While not disputing that the frame of any gen 1 is worthy of inspection for cracks ...
... I have my doubts that even if a crack were present, that it would cause the symptom described.
Tire type, pressure, condition, and age.
That you are speaking metric, suggests that you are possibly in Canada. What's the weather like? Little chilly, perhaps? Roads covered in fine sand left over from the winter? Where I am (just west of Toronto), we have not had rain to wash salt residue off yet. Hardly optimum conditions for grip.
What's the ride height like? Any evidence that the bike may have been lowered?
Helibars, MRA screen, Ohlins damper, reversed shift pattern, sorted suspension, braided lines, Michelin Pilot Power, all else stock 'coz it's fast enough!