6th gear

[ztsmith064]

Hello all! Has anyone ever worked with a machine shop to fabricate and add more gears to their Vmax? I have the dream of one day adding a 6th and even 7th gear. I want 6th gear to turn over roughly 4,000rpm at 80mph and 7th gear to be a true highway gear and turn over roughly 2,500rpm at 80mph. I recognize that this will be a costly venture, but this would be for a bike I will never sell and probably place into a family trust. Please don't come in and recommend moving to a different bike, I'm curious what this community has done in only this reguard!

 

[Pighuntingpuppy]

Not to say it cant be done, anything can be done with enough money and imagination......that being said.....the space in which the current transmission sits it would have to sacrifice strength in order to fit the other gears in. If a single gear is 1 inch wide and you wish to add a gear, you must make the other gears thinner to fit the gear set in the same space. I frankly dont see the gearset lasting the long haul especially on a muscle bike.

 

[Traumahawk]

Anything can be done with enough time and money, but I don't think it's ever been done.

Are you talking gen 1 or gen 2 will be the first question.

 

[ztsmith064]

Not to say it cant be done, anything can be done with enough money and imagination......that being said.....the space in which the current transmission sits it would have to sacrifice strength in order to fit the other gears in. If a single gear is 1 inch wide and you wish to add a gear, you must make the other gears thinner to fit the gear set in the same space. I frankly dont see the gearset lasting the long haul especially on a muscle bike.

I thinkI would more than likely cut and expand the case in order to add more gears

Anything can be done with enough time and money, but I don't think it's ever been done.

Are you talking gen 1 or gen 2 will be the first question.

This is a 1200! I apologize for leaving that out!

 

[Fire-medic]

Not practical. The shift drum would need to be changed besides the gears added. Contact Sean Morley [email protected] to get Venture 5th gear ratio changes and a Venture rear (final) drive which is a 'longer' ratio (lower numerically) which is a much less $$$ way to get lower rpm's if that's what you're after.

 

[88bradb]

Hello all! Has anyone ever worked with a machine shop to fabricate and add more gears to their Vmax? I have the dream of one day adding a 6th and even 7th gear. I want 6th gear to turn over roughly 4,000rpm at 80mph and 7th gear to be a true highway gear and turn over roughly 2,500rpm at 80mph. I recognize that this will be a costly venture, but this would be for a bike I will never sell and probably place into a family trust. Please don't come in and recommend moving to a different bike, I'm curious what this community has done in only this reguard!

First of all if you have original wheels try the upsize rear tire. I did that and it made a noticeable improvement on the interstate.

 

[Tom Determan]

To make room for another we'd REALLY have 2nd gear issues if we shaved 1/8" off that one. If 2nd is left alone, what's next, 3rd gear problems? Leaving all those gears alone and adding length might create shaft load problems or harmonics. The objective of lowering the RPM at the same load of 80 MPH probably doesn't change the BSFC (fuel consumption) all that much anyway. Yamaha may have designed and tuned it for best BSFC @ the current cruise RPM. The noise and vibration might change noticeably.

But as Pighuntingpuppy mentioned nothing is impossible, it's just costs more.

 

[Redrum]

A 2 speed rear end or additional overdrive type transmission might be a little more doable.