6 speed transmission?
Thread Starter
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Dirt don't hurt
Joined: Jan 2011
Posts: 21,062
Likes: 4,547
From: Haslet Texas
6 speed transmission?
I was thinking about putting in a 6 speed transmission in my bike, the motor is a stock evo with an EV27 cam. My question is will a 6 speed work with that motor or not? I have been told it will by some people and others tell me the evo doesn't have enough tork to utilize the 6th gear (The motor will lug).
What are ya'lls thoughts.
What are ya'lls thoughts.
Seasoned HDF Member
Joined: May 2008
Posts: 21,032
Likes: 12,559
From: South Carolina
Which six speed, a direct drive or an overdrive?
A direct drive 6 will have the same gearing in high gear as your 5 speed.
The overdrive 6 will have a higher gear.
My thoughts...stick with the 5 speed.
A direct drive 6 will have the same gearing in high gear as your 5 speed.
The overdrive 6 will have a higher gear.
My thoughts...stick with the 5 speed.
Elite HDF Member
Joined: Sep 2007
Posts: 4,468
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From: Bluffton, South Carolina
When we do a 6 speed in a fairly stock 80" EVO we usually reccomend that they drop 1 tooth on the tranny sprocket. That makes it easier on the engine and still gives the bike longer legs. Hope this helps.
Stellar HDF Member
Joined: Feb 2007
Posts: 2,558
Likes: 280
From: Russellville, Arkansas
I considered installing a six speed in my Ultra. After many conversations and trying other bikes...I don't think the EVO really needs another gear.
Club Member
Joined: Jun 2007
Posts: 45,429
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From: Bedford UK
Thread Starter
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Dirt don't hurt
Joined: Jan 2011
Posts: 21,062
Likes: 4,547
From: Haslet Texas
Are you sure about the 6 speed top gear having the same ratio as the 5 speed? I only ask because to me it makes no sense to do something like this as there is no gain in getting the 6 speed.
When I called the manufacturer they told me that with the 6 speed I could drop 500 rpm when I shift into 6th with a direct drive. Are they just lying to me to sell a more expensive product?
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Club Member
Joined: Jun 2007
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From: Bedford UK
As Dan describes, there are two types of 6-speed available. Take a look at Bakers website, they explain things there. Direct Drive gives 6 closer ratio gears, with the same top gear. For some customers that is a gain! Overdrive gives an extra gear higher than stock fifth, which for other customers is a gain. Sounds like you are in the second group, so make sure you get what you want!
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Cruiser
Joined: Dec 2010
Posts: 110
Likes: 1
From: central NC
Ther is also close ratio options. That gives a slightly taller first gear. I have a revtech6 but I went from a 65 rear to a 70 rear and that puts first back close to original. I like it alot but even with close to 100 horses and the slightly lower gearing I only use 6 on the open highway at 70. But if you do alot of long highway runs than it is worth it. I know of people that have put a 6 in stock evos with stock gearing and they just don't pull it very well. They really need to be regeared.
Stellar HDF Member
Joined: Jul 2011
Posts: 2,583
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From: Boston, MA
True for highway. I use my bike for commuting and I have scoured everything Baker has put out there and believe if u want to cruise at 70+ then u may opt for a 6speed but if you're looking for more options in the 20mph - 50 mph range your stock tranny should suffice.