Description
This is a complete service manual for the 1984 and 1985 Yamaha RZ350, covering the full 347cc liquid-cooled, reed-valve, twin-carb two-stroke parallel-twin used in both model years. The RZ350 has a 64mm bore and 54mm stroke, and it was the first bike in Yamaha’s RD lineup to use the YPVS (Yamaha Power Valve System), which varies exhaust port height to broaden the powerband.
One detail that makes the US-market RZ350 unusual among two-strokes of its era: it was built with a two-stage catalytic converter in each muffler to meet federal emissions rules, and because catalytic converters can’t tolerate leaded fuel, the gas tank has a restrictor in the filler neck so only unleaded fuel can be used. The emissions equipment wasn’t sufficient for California standards, so the RZ350 was never sold through California dealers — a detail worth knowing if you’re chasing down a hard-to-diagnose fueling or emissions issue on one of these bikes.
This manual is 240 pages and covers engine, YPVS system, carburetion, cooling, electrical, chassis, and the emissions/catalytic-converter components specific to the US-spec machine. Delivered as an instant-download PDF (38.98 MB), readable on Windows, Mac, tablet, or phone — no shipping, no waiting.
Frequently Asked Questions
What years and models does this manual cover?
The 1984 and 1985 Yamaha RZ350, US-spec, including the catalytic-converter emissions system unique to those model years.
What format is the manual in, and how do I access it?
It’s a 240-page PDF (38.98 MB), delivered by instant download after checkout — no physical copy is shipped.
Does this manual cover the YPVS power valve system?
Yes. The RZ350 was the first Yamaha RD-series bike fitted with YPVS, and the manual covers its inspection, adjustment, and repair.
Will this work on a Canadian or export-model RZ350?
This manual is written for the US-spec 1984-1985 RZ350, which included catalytic converters and an unleaded-fuel restrictor not fitted to all export markets. If your bike isn’t US-spec, some emissions-specific sections may not apply.
