This 660cc 4x4 utility ATV arrived as the second generation of Yamaha’s Grizzly utility line, following the earlier 600-class machine and moving the nameplate into a larger-displacement era. It was developed to give the platform a stronger, more refined character while preserving the rugged work-first personality that made the original Grizzly successful. Yamaha’s design and technical materials describe it as a full-change model with a tougher stance, improved body integration, and a more expressive front-end treatment, reflecting its positioning as a flagship utility ATV for demanding trail, farm, forestry, and recreational use.
The nameplate first appeared for the 2002 model year in export markets, and Yamaha was still listing it in the 2006 and 2008 model-year ATV lineups. For Japan, the model was launched later, in 2003, as a domestic-market release. The final 2008-model-year version was offered alongside the new 700-class successor, which inherited much of the 660’s role and core utility focus before fully replacing it.
Enthusiast interest in this ATV has remained strong because it marked an important turning point in Yamaha’s utility lineup: it combined a bigger engine, independent suspension, and a more modern chassis package than the 600 it replaced, while still staying true to the straightforward, hard-working Grizzly identity. It is often remembered as the model that established the Grizzly as one of the best-known big-bore utility ATVs of its era.