Roongroj Mahanakorn Co., Ltd.
4220-4222 Rama IV Rd, Phra Khanong, Khlong Toei, Bangkok 10110
The dual Yamaha certifications matter if you ride a Yamaha and want service that follows factory protocols. The Keeway side covers a budget brand that most central Bangkok shops skip. Go here for cross-brand convenience under one roof.
You walk into a working dealership floor with bikes lined along the showroom and a service bay that handles multi-brand repairs. Roongroj Mahanakorn operates as an authorized dealer for Yamaha and Keeway, covering both new-bike sales and after-sales service at the same Rama IV address.
The Yamaha side holds two certifications that separate this from generic repair garages: Yamaha PRO CARE (the brand's authorized service standard) and Yamaha GREEN SERVICE SHOP (an environmental service protocol). Both matter if you own a Yamaha and want technicians trained to factory spec. The Keeway dealership side serves riders on tighter budgets, covering a brand with fewer service points in central Bangkok. Parts inventory spans both lines.
Service options include on-site repairs and delivery. Payment runs through cash, debit, credit, or NFC mobile at the counter. Two phone lines take bookings: the main landline at 02-249-3536 and a mobile line at 063-245-1118. The company operates additional branches across Bangkok, including a showroom further west on Rama IV and a Sathu Pradit location.
Operating hours show a discrepancy between sources. The Yamaha dealer page lists Monday through Sunday from 08:00 to 17:00, while the Google listing shows Monday to Saturday 08:00 to 18:00 and closed Sundays. Call ahead if you plan a Sunday visit. Rama IV traffic compresses hard during weekday peaks, so timing your arrival outside 08:00 and 17:00 makes access smoother.