Lately I've been wringing out a chaindrive XS11 to see how fast it'll go. The bike has had a 35T rear sprocket, and I've also swapped on a 40T to see how that performs. The 40T makes the bike feel 'racier' and I prefer it to a 35T. 65mph cruising is now 3600 revs in 5th. 35T gave 3200@65. Stock is about 4200@65. Will try a 45T for close to stock gearing with some brutal kick, but the 40T is about perfect
Top speed only increases with taller gearing if the conditions are good with a tailwind. Otherwise there's not much difference as the XS is still horribly un-aerodynamic. The best thing about a 35T is you can hit big speeds with bugger all gear changing, and fast 100mph cruising feels effortless. 3rd gear pulls to 110mph quickly, anywhere anytime. With the 35T, the fastest I've seen on the digital speedo was 228kph. Thats a bit over 140mph. To hit 150mph, you'd need a long downhill run. There is some lonnnggg hills round here, and 150mph would be easy to do!! Haven't tried it though. Yeah - what a wimp.
On the flat, without one of those specialised ugly, long Bonneville Salt Flat rocket type fairings, you'd need high duration cams, race springs and a stage111 port job(top end type) 4 valves per cylinder and flatslides would surely make 150mph possible 90% of the time if so desired.
Top speed only increases with taller gearing if the conditions are good with a tailwind. Otherwise there's not much difference as the XS is still horribly un-aerodynamic. The best thing about a 35T is you can hit big speeds with bugger all gear changing, and fast 100mph cruising feels effortless. 3rd gear pulls to 110mph quickly, anywhere anytime. With the 35T, the fastest I've seen on the digital speedo was 228kph. Thats a bit over 140mph. To hit 150mph, you'd need a long downhill run. There is some lonnnggg hills round here, and 150mph would be easy to do!! Haven't tried it though. Yeah - what a wimp.
On the flat, without one of those specialised ugly, long Bonneville Salt Flat rocket type fairings, you'd need high duration cams, race springs and a stage111 port job(top end type) 4 valves per cylinder and flatslides would surely make 150mph possible 90% of the time if so desired.
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