This page contains some technical data relating to recent Scorpa Twenty Trials Racing and Factory models.

Parts books and maintenance manuals can be downloaded from our parts books page.

If you can't find what you need please contact us with your query.

Please note that 2017 onward models with diaphragm clutch use 650cc of transmission oil

Clubmen: We recommend a flywheel weight and slow action throttle to smooth power delivery. If you want even smoother power, please contact us!

Commonly asked...

Pre-mix ratio	All year models	70:1
Pre-mix oil	All year models	Putoline TT Trial Pro
Spark plug	Racing - all year models	NGK BPR5ES
	Factory models until 2016	NGK BPR5ES
	Factory models from 2017	NGK BPR5HS
Spark plug gap	All year models	0.8mm
Gearbox oil	All year models	Putoline Light Gear Oil (75W)
Gearbox oil cap	Factory and Racing until 2016	450ml
	Factory and Racing from 2017	650ml
Coolant	All year models	Putoline Coolant NF

 

Torque Settings

Part #	Description	NM	Part #	Description	NM
M295	Crank Nuts	100	M291	Barrel Studs	22
M290	Cylinder Head Studs	10	M271	Cylinder Head Nuts	10
M272	Barrel Nuts	22	M293	Clutch Nut / Thread Lock	60
M296	Front Engine Bolt	40	M266	Rear Engine Bolt	22
M304	Shock - Top Bolt	40	C173	Shock - Bottom Bolt	50
C154	Swing Arm Nut	50	C172	D-Link Bolt	40
C175	Dog Bone Nut	25	C205	Front Spindle Nut	50
C326	Rear Spindle Nut	60

 

Bore and Stroke (mm)

The 250 machines have a bore and stroke of 72.76 x 60, the 300s are 78.95 x 60