Royal Riley Motorbike 2¼hp (1903-04)

For 1903, Riley increased the size of the engine on their motorbikes to 2¼ hp. However, this wasn't just a change of supplier as had happened before, this was a brand new engine, designed in house by Percy Riley and built by his new Riley Engine Company. It also wasn't the only engine available, with two larger versions also built for the motorbikes. The frame was also beefed up, with twin tubes in places, presumably to take the bigger engines and more power without danger.

ENGINE

Riley engine
Single Cylinder
RAC Rating2¼hp
Capacity 269.4cc
Bore70 Stroke 70
Carburation Longuemare Updraught

TRANSMISSION

Freewheel in rear hub for pedal drive
Final Drive Ratio 8:1

SUSPENSION

Optional sprung saddle

BRAKES

Front rim and Riley-Bowden rear rim.

PERFORMANCE

Negligible!

DIMENSIONS

Frame Size 20-23" (aprx. 500-580mm)
Wheels Dunlop tangentially spoked
Tyres 26x2
Fuel Tank 2 galls

PRICE

42 guineas