This is a new aftermarket replacement for the SRX600 Igniter which has been discontinued by Yamaha.
Factory unit may have these numbers stamped on it:
3LD-82305-00, 3SX-82305-00, 131800-5220, 131800-5221, TNDF06, Denso
The new replacement ignition unit is larger and will mount differently than the original part. ( See orange part below)
This unit has some improvements over the stock unit: