Tested my Speedmaster -03/-04 on the strip last weekend. I´ve got LeoVince silencers,790cc, 125/45/TBS-needles, DNA air-filter and 17-t sprooket.
I ran 8.800 /127km/h (79mph). I guess it would run high 13 on the 1/4.
In 1991 a ran the 1/8 mile at 8.47/131 km/h on my 883 Sportster bored to 1200cc with Andrews V4 cams and SuperTrapp 2:1.

The Speedmaster was easy to ride on the stríp, good tracktion and consistent. Would bee a good bracketbike.

Janne, Blotsvens Mc, Sweden