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Discussion Starter #1
When I got my scoot it had an ultima 6 speed gear set in it. Well, it started having problems. There guy that used to have it told me he had a5 speed gear set that didn't have squat for miles and would sell it to me for a great price. Also told me that he would install it for me. So took him there bike Thursday and her brought it back Saturday.

Now I guess what I'm asking is, has anyone that has an older Glide that came with a5 speed that has put in a6 speed did your milage suffer? With the 6 speed I had I could only get about 120-130 miles to the tank and I thought that it might have been a fueling problem but after the five speed I have over a 140 miles on there clock and still have over 1/4 of a tank.

So, does any of this make sense to anyone?? Believe it or not but I think I'm gonna like the five speed better, even if I am still looking for sixth gear... :joy:
 

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For the most part both 5 and 6 speed transmissions have a 1:1 ratio in top gear, so it shouldn't have any effect on you mileage. Unless by chance you had a 6-speed overdrive transmission ... I don't know if Ultima makes one.

I've spent the last few weekends putting a RevTech 6-speed overdrive tranny in my 81 FLTC. It's still got a ways to go but when done it's supposed to drop the RPMs about 300 when I hit 6th.
 

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Make sure that you're actually travelling the distance that your odometer says you are. I have no clue how the speedo is driven, but I agree with Joker... that much change is unlikely!
 

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Discussion Starter #4
Thanks guys, really appreciate the replies. The guys I ride with my speedo is still right with theirs. With the six speed I was taching about 2700 in sixth at 65, with this one I'm taching right at 3000 at 65. So I don't know if the ultima going bad was binding or something causing the bad fuel milage or what, but it is a noticeable difference.

The flh autta sure be sweet with that six in it. Let us all know how it goes.
 

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Anyone else find it odd that the previous owner just happened to have had an extra tranny laying around??? Seems like he knew ahead of time that the Ultima 6spd was going to cause him a problem soon, but then unloading the bike on you.
 

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Discussion Starter #6
Actually the previous owner traded it in at the dealer and I got it from the dealer and of course no warranty. Darrell, the previous owner, also works on bikes at his house so he does have many parts in his garage. Not saying that it couldn't have been the reason for trading in tho either. Over the past couple of years we've gotten to be purty good friends and have ridden together on a few occasions. So in all honesty, I think if he thought it was gonna crap out very soon he would have swapped it out before hand.
 

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That Ultima 6 speed and the Rev Tech are both Asian made, I believe Korean. Rev Techs were recalled about a decade ago for serious life threatening defects. I put a Screamin' Eagle 6 speed in my "02 Fat Boy back around '05. It has a .89 overdrive. I loved having a 6 speed when new Harleys still had 5 speeds! I still have that bike and it's pumpin' out well over 100 h.p. and torque. I get great gas mileage, and it has been stone reliable for nearly 60,000 miles.

To clarify the post about 5 and 6 speeds still being 1:1, that's misleading. Yes the new Harley 6 speed is 1:! but low gear is way lower than a 5 speed and the primary drive is quite a bit higher so r.p.m.s are reduced at the same speed in 6th gear vs a 5 speed. That reduces engine wear and improves gas milage. You will be roughly the same revs at 80 as you would be at 70 with a 5 speed.

It's your bike, your money, and your ass if that Asian tranny locks up at 80 m.p.h. I wouldn't replace a good Harley 5 speed with anything besides an American made Screamin' Eagle, Baker or Jims tranny myself. Sometimes cheapin' out ain't so cheap!
 

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To clarify the post about 5 and 6 speeds still being 1:1, that's misleading. Yes the new Harley 6 speed is 1:! but low gear is way lower than a 5 speed and the primary drive is quite a bit higher so r.p.m.s are reduced at the same speed in 6th gear vs a 5 speed. That reduces engine wear and improves gas milage. You will be roughly the same revs at 80 as you would be at 70 with a 5 speed.
Actually it's not since I wasn't in any way referring to the newer bikes, and most of the (relevant to the discussion) retrofit 6-speed in a 5 speed case transmissions are indeed 1:1 in top gear ... Because I guess some people like the closer spacing, or shifting more, or something.. Personally I prefer the spacing of a 5 myself, but thought I'd give the 6 a shot since the one I found was an OD 6th.

I've been run RevTech tranny's for years (about 15), and never had a problem with them.
 

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Well in my "limited experience," my friends and myself all went for S.E. or Baker OD 6 gears sets for reducing revs at freeway speeds. The OP was concerned about fuel mileage and reducing revs is one way to get that. I know guys who went with Baker's DD6, which is a 1:1 sixth gear, but they did the primary change to get the revs down at high speed in sixth. That's what late model Harleys with 1:1 six speeds do. Telling a guy who is looking for better mileage that a six speed wouldn't help mileage is misleading. It's easy to get a final drive ratio down to less than 2.90:1 with a six speed. Stock Five speed Harleys with 1:1 ratios final drives were either 3.36:1 or 3.15:1. My RGS Six Speed is 2.87:1 with the newer ratios in the primary. That allows for a lower low gear to get you going and still act like an overdrive in the direct drive or 1:1 6th gear. I recently got 49 mpg in 200 miles

I'm glad that you got good service out of that Asian Rev Tech tranny. Others weren't so lucky!
 
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