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.

 

My Evo, which is probably a lot lighter than your bike, works fine with a six speed. The "lug" is in the seat, not in the motor, LOL!

 

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.

 

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.

 

I totally agree here....if you go with a six speed on stock EVO.

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.

 

Agreed! I briefly considered a 6-speed, for my S&S 107. I'm running stock US gearing (UK spec was originally higher), but changed my mind and stayed with the stock 5-speed. I have over 100HP/TQ, but want to get the best out of it!

 

My thanks for your thoughts but I have a question.
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?

 

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!

 

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.

 

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.