- Model Name: RG400 Gamma - Type: Service Guide - Manufacturer: Suzuki - Model: RG400EW, RG400EW-2 - Year of Publication: Showa 60 (1985) Thank you for viewing. This is a Suzuki RG400 Gamma service guide. I purchased and used it around the time of publication and have stored it at home for many years. *Please note that the front and back covers have fine wrinkles, stains, and signs of aging. Please purchase only if you can accept this. The inside is relatively clean (see photo 4). I also have other motorcycle-related items, including RG400 parts, for sale. I can accommodate combined purchases if you need them. Shipping via Rakuraku or Yu-Yu Mercari delivery (envelope).