2021
Sinnis RSX125 - Specifications & Review

Article Complete Info
| Articleid | 337847 |
|---|---|
| Category | Naked bike |
| Make | Sinnis |
| Model | RSX125 |
| Year | 2021 |
Chassis, Suspension, Brakes & Wheels
| Frontbrakes | Single disc. Hydraulic. |
|---|---|
| Frontsuspension | Telescopic forks |
| Fronttyre | 100/70-17 |
| Rearbrakes | Single disc. Hydraulic. |
| Rearsuspension | Adjustable Single Monoshock |
| Reartyre | 100/70-17 |
Engine & Transmission
| Coolingsystem | Air |
|---|---|
| Displacement | 125.0 ccm (7.63 cubic inches) |
| Enginedetails | Single cylinder, four-stroke |
| Fuelsystem | Injection. EFI |
| Gearbox | 5-speed |
| Power | 11.0 HP (8.0 kW)) @ 9500 RPM |
| Transmissiontypefinaldrive | Chain |
Other Specifications
| Coloroptions | Pearl White, Midnight Purple |
|---|---|
| Instruments | Semi-Digital |
| Starter | Electric |
Physical Measures & Capacities
| Dryweight | 140.0 kg (308.6 pounds) |
|---|---|
| Fuelcapacity | 13.50 litres (3.57 gallons) |
| Overallheight | 1070 mm (42.1 inches) |
| Overalllength | 2065 mm (81.3 inches) |
| Overallwidth | 864 mm (34.0 inches) |
| Powerweightratio | 0.0786 HP/kg |
| Seatheight | 800 mm (31.5 inches) If adjustable, lowest setting. |
About Sinnis
Country of Origin:
United Kingdom (brand/design); manufacturing via China with EU finishing
Founder:
Sinnis Motorcycles (Brighton-based distributor)
Best Known For:
Value 125–380 cc commuters, ADV-styled models, and learner bikes for the UK
Company History
Sinnis built a loyal UK following by pairing well-specced small motorcycles with local support—spares on the shelf, phone-answering dealers, and honest manuals. Early offerings focused on 125 cc commuters; later models added small-ADV and retro styles with ABS/CBS, EFI, and improved coatings for British weather. The brand’s real contribution is predictability for new riders: approachable seat heights, tidy fueling, and customer service that demystifies first ownership. Sinnis also nurtures community through ride-outs and training partners, treating the purchase as the start of a relationship. Historically, Sinnis exemplifies how a distributor can turn global platforms into trustworthy local products by sweating aftersales details and spec choices that match real UK roads and licensing.
