6 speed Transmission

jkieler · #1 (**permalink**) 03-10-2007

Does anyone make an aftermarket 6 Speed tranny for the thruxton yet?

:hammer: :hammer: :hammer: :hammer:

Jeremy K :-D :-D :hammer: :hammer:

rbrian_taylor · #2 (**permalink**) 03-10-2007

That would be nice, wouldn't it?

sweatmachine · #3 (**permalink**) 03-10-2007

I like the 5 speed, every time I ride my brother's SV650 (6 speed) it feels like it has one too many gears...then I get on my bonnie and it's just right.

Mecchanica · #4 (**permalink**) 03-10-2007

The only reason for a six speed that I can see is if I were to install some road race cams, with lots of overlap and long duration, making for a narrow power band (and the high compression pistons to match). Otherwise, with a large displacement twin, you have enough torque to pull the jump in gears. The gears would have to be narrowed to squeeze in another set, and I don't know if that would necessarily affect durability.

rbrian_taylor · #5 (**permalink**) 03-10-2007

Well, at least a taller 5th gear would be nice, at least 1:1 if not overdrive. It would be nice for longer distances, the mundane HWY rides...

robnobrakes · #6 (**permalink**) 03-11-2007

I have changed my front sprocket from an 18 to a 19 tooth and rear sprocket from a 43 to a 41 tooth. These mods reduced the revs considerably at motorway (freeway) speeds without sacrificing accelleration (with my modified engine).

bonnieblackinfl · #7 (**permalink**) 03-11-2007

6 gears would be nice, I could go to a 16T front sprocket to haul my fat azz around and have the same highway rpm.

Greg

jkieler · #8 (**permalink**) 03-26-2007

I think the Six speed would help greatly on the fuel economy on the highway maybe get us into the 50's instead of my upper end 30'snull

robnobrakes · #9 (**permalink**) 03-27-2007

Try changing your sprockets, up one on the front, down two on the rear :hammer: :hammer: :hammer: :hammer: :brk: :brk: :brk: :brk: :brk: :brk: :brk:
it works, I promise you :-D :-D :-D :-D :-D :-D :-D :-D

[ This message was edited by: robnobrakes on 2007-03-27 10:13 ]

BeastInBlack · #10 (**permalink**) 03-27-2007

Robnobrakes, I have the same engine mods done to my bonneville t100 (at bob farnhams tuning), although I am using a 19t sprocket, I would love to have taller gearing at the top end, because I fear if I reduce the rear sprocket it will sacrifice the ridability around town.

Ideally id love to have closer gearing, with more gears but whatever the setup it will always be a compromise for me because my riding involves so many different types of road ie highway, around town, very twisty lanes, country roads etc.