SERVICING SYDNEY AND SURROUNDS SINCE 2002
TRANSMISSIONS
After many years of seeing multiple failures in Harley six-speed transmissions, we now have the most cost-effective race proven solution with the Simon Motorsport billet shift drums and trapdoors exclusive to TwinTune Performance Centre !
For more information, watch this YouTube video by Andy Simon Snr himself.
TwinTune offer a full transmission rebuilding service as well as in house gear back-cutting service to create slick shifting transmissions for Big Twins and V-Rods.
Options include basic street, street pro and heavy duty with billet support plate.
TT. Transmissions with Simon Motorsports products simply the best value for money transmission upgrade available anywhere !
Billet support plate Billet shift drum Cryo treated Shot peened heat tempered gears and shafts M8 and Twin Cam
The Heavy duty edition Billet support plate, Billet shift drum, back cut, Shot peened, Cryo treated Heat tempered gears and shafts M8 and Twin Cam
Heavy Duty M8 and Twin Cam
Heavy Duty M8 and Twin Cam
Heavy Duty M8 and Twin Cam
Heavy Duty M8 and Twin Cam
Simon Motorsports shift drum and billet support plate M8 and Twin Cam
Simon Motorsport billet shift drum the original and only complete solution available anywhere to eliminate Harley transmission failures
Improper third gear engagement OEM six speed
Billet support plate raw
Billet support plate in black
Simon Motorsport billet shift drums and billet trapdoor
Basic street with Simon Motorsports shift drum M8 and Twin Cam
Street Pro back cut with Simon Motorsports shift drum M8 and Twin Cam
Heavy Duty M8 and Twin Cam
Simon Motorsports Gen 2 M8 support plate
Heavy Duty M8 and Twin Cam
Basic street with SImon Motorsports shift drum
Heavy Duty Gen 1 M8 Billet support plate in Black powdercoat
Brand new transmissions always in stock at Twintune
Heavy duty M8 Gen 1 fit up
Always a big seller for high output motors M8 and Twin Cam Heavy Duty
Billet support plate in black powdercoat
Gen 1 M8 Heavy Duty with black powdercoat
Heavy Duty M8 and Twin Cam
Transmission rebuilds
Gear sets awaiting treatment
The billet look
Heavy duty transmission fit up
The polished look
Heavy duty M8 and Twin Cam polished support plate
The polished look
The polished look
Variety of transmissions in stock
The Polished look Heavy Duty M8 and Twin Cam