S5GS Tuning

Sprockets	PHBG21 Dell'Orto	S5 Clutch	Clutch Springs	Grippa race clutch	R&D Exhaust	S5 Transmission Gears

10T or 11T front sprocket £14.69

Allows you to improve top speed or acceleration (check your current sprocket)

4 reed 50cc cylinder conversion £141.00

a big increase in performance over the non reed cylinder, kit is complete with cylinder, head, piston kit, reed block, manifold & gaskets (needs PHBG carb). Will require modifications to fit (includes trimming cooling fins) on some bikes.

4 reed 70cc cylinder conversion £152.75

a big increase in performance over the non reed and 50cc cylinder, kit is complete with cylinder, head, piston kit, reed block, manifold & gaskets (needs PHBG carb). Will require modifications to fit (includes trimming cooling fins) on some bikes.

PHBG carbs from £70.44 to £88.13

The carbs are multi jet with round slides, a big improvement in size & performance over the SHA (flat slide single jet) carbs. Sizes are 15, 18, 19 & 21mm. Types available to fit rubber & alloy inlet manifold (please specify). Will maximise performance on reed valved cylinder, minor increases on non reed cylinders. Will require a new manifold if replacing an SHA carb.

Performance clutch £44.77

As OE clutch but with stiff performance springs to hold clutch in till higher engine rpm. Gives better racing starts, and matches new power curve of 4 reed cylinder

Performance clutch springs £4.94 per pair

Available in medium & stiff versions, gives you adjustability in the enguage point of the clutch in relation to engine rpm. Gives better racing starts, and matches new power curve of 4 reed cylinder

Racing clutch £142.00

Solid steel clutch designed for very high rpm on the highly tuned engines

R&D KTM exhaust system £205.63

Optimises the S5GS performance from pre 2001 KTM’s

Racing transmission gear £58.36

Cast steel transmission drive gear is stronger than the original cast iron gear to take shock loadings without breaking.