 Re: Yet another vindication of the TBA
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Joined: Jan 2015
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Adjunct
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Adjunct
Joined: Jan 2015
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I also own a 2007 america, which on a good day will get to 170 kph, I run a 18..41 tooth combination which lowers the revs just a tad, there was no difference in top speed over a 18..42 tooth combination. I usually ride around 120 kph and dont feel the need for a 6th gear. A 19 tooth will certainly lower your revs quite a bit, but I I'm not sure it will make you go faster, possibly the opposite as the engine tries to pull the taller gearing, I could be wrong though and will be interested in finding out the outcome should you go to a 19t.
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Re: Yet another vindication of the TBA
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Joined: Jun 2009
Posts: 3,995 Likes: 10
Loquacious
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Loquacious
Joined: Jun 2009
Posts: 3,995 Likes: 10 |
I'm running an 18/42 standard set up at the moment and I often test the lever on the highway to see if there's another gear there.I have done the carb jets/air filter/bellmouth/A.I.blocked/Aftermarket pipes,and the bike runs ok but 19T sprocket is a cheap modification to try so we'll see.If I don't like it it's easy to reverse.
I read or heard somewhere a tooth off or on the back sprocket is worth 2 off or on the front.
Dinosaur.
"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland
"Don't let the bastards get you down". Kris Kristofferson
"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville
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Re: Yet another vindication of the TBA
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Joined: Jan 2006
Posts: 7,701 Likes: 22
Monkey Butt
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Monkey Butt
Joined: Jan 2006
Posts: 7,701 Likes: 22 |
Years ago I went 19T and never went back. Taller gears, no problem two up, and no reaching for 6th gear. You will be around 90 MPH, 140 KPH when 4th is winding out.
The biggest mistake folks make with 19T is starting at lower speeds to crank them up in 5th, you run out of HP. If you learn the depth of the gears you develop the HP with the RPMs and you will run over 100 MPH easily. 160KPH I think.
You will not have enough HP to reach your rev limiter in the taller 4th and 5th gears but at the attained speeds you won't need to reach way up there. 6500 seems to be the high end sweet spot for shifting when you push it hard.
I try to aggravate one person a day. Today may be your day.
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Re: Yet another vindication of the TBA
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Joined: Jan 2005
Posts: 6,681 Likes: 1
Bar Shake
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Bar Shake
Joined: Jan 2005
Posts: 6,681 Likes: 1 |
You need a big 36mm socket to get the front sprocket off. I remember I changed both. Of course I replaced my chain too. It's best to do all at once if your chain is worn out. I got everything I needed from fasteddy, including the socket head. 
"Catching a yellow jacket in your shirt at seventy miles per hour can double your vocabulary" Author unknown
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Re: Yet another vindication of the TBA
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Joined: Aug 2008
Posts: 146
Adjunct
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Adjunct
Joined: Aug 2008
Posts: 146 |
I do most of my riding around town, not much long distance so I'll be staying with my 17 tooth counter sprocket. My buddies all ride Harleys with much larger engines than my bike and they have gobs of torque right off idle so they try to get the jump on me right off the line. The lower gearing gets me in the sweet spot sooner. That 790 has some spunk!
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Re: Yet another vindication of the TBA
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Joined: Jan 2015
Posts: 220 Likes: 2
Adjunct
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Adjunct
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Paul, I have the same mods as you and am happy with the way the bike performs, according to my tacho and speedo (if you can believe them) I'm doing 3200 revs at 100kph.. 3800 revs at 120kph, not really very high revs barely half way through the rev range, my only concern with a 19t is my clutch, my wife pillions with me a lot and I noticed that even with one tooth less on the rear sprocket more clutch was needed to get of the mark I felt that anymore would put a fair bit of stress on the clutch. I'm sure once we were up and running the bike would be ok with a 19t. I'll be interested to here what you think if you do change..
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Re: Yet another vindication of the TBA
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Joined: Jun 2009
Posts: 3,995 Likes: 10
Loquacious
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Loquacious
Joined: Jun 2009
Posts: 3,995 Likes: 10 |
Quote:
Years ago I went 19T and never went back. Taller gears, no problem two up, and no reaching for 6th gear. You will be around 90 MPH, 140 KPH when 4th is winding out.
The biggest mistake folks make with 19T is starting at lower speeds to crank them up in 5th, you run out of HP. If you learn the depth of the gears you develop the HP with the RPMs and you will run over 100 MPH easily. 160KPH I think.
You will not have enough HP to reach your rev limiter in the taller 4th and 5th gears but at the attained speeds you won't need to reach way up there. 6500 seems to be the high end sweet spot for shifting when you push it hard.
Thanks Ron.I guess like Billy said,ride it like a 4 speed with overdrive.I do most of my running at 65-70 mph[110-120kph] with occasional higher bursts of speed to about 90[140kph],but only 60mph[The 100kph speed limit] if the cops are hot.How does your 19T go at those speeds?Do you use 5th gear?If not I may not have use for 5th much.
Dinosaur.
"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland
"Don't let the bastards get you down". Kris Kristofferson
"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville
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Re: Yet another vindication of the TBA
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Joined: Jun 2009
Posts: 3,995 Likes: 10
Loquacious
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Loquacious
Joined: Jun 2009
Posts: 3,995 Likes: 10 |
Quote:
You need a big 36mm socket to get the front sprocket off. I remember I changed both. Of course I replaced my chain too. It's best to do all at once if your chain is worn out. I got everything I needed from fasteddy, including the socket head.
Hi Paul.My chain is going fine.I bought a front 18/rear 42 and chain set from Eddy a long time back but haven't needed to use them.I reckon there's a fair bit of wear left in the chain so I'll just add the 19T.It could wear the chain out a bit faster but nevermind.
Dinosaur.
"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland
"Don't let the bastards get you down". Kris Kristofferson
"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville
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Re: Yet another vindication of the TBA
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Joined: Jun 2009
Posts: 3,995 Likes: 10
Loquacious
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Loquacious
Joined: Jun 2009
Posts: 3,995 Likes: 10 |
I wont get to the change for another 3 plus months Peter.I spend half my year in Thailand ATM and I wont be home until the end of January .I only ride solo but there's quite a bit of me to move off the line  .I need a big service when I get back so I'll do the sprocket at the same time.I do find the 18T alright but it does buzz a bit at higher highway riding speeds. I'll post on the results as soon as I can.
Dinosaur.
"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland
"Don't let the bastards get you down". Kris Kristofferson
"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville
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Re: Yet another vindication of the TBA
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Joined: Jun 2010
Posts: 1,193 Likes: 22
Learned Hand
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OP
Learned Hand
Joined: Jun 2010
Posts: 1,193 Likes: 22 |
A m I right in thinking the factory front sprocket has a rubber pad on its face?
Presumably aftermarket ones don't and therefore a bit more vibration might be expected?
Al
I took the Road Less Travelled.
Now where the ****** am I?
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Re: Yet another vindication of the TBA
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Joined: Aug 2008
Posts: 146
Adjunct
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Adjunct
Joined: Aug 2008
Posts: 146 |
I switched to an aftermarket front sprocket for a while. It was all metal, didn't have the rubber pad and I didn't notice any more vibration than stock. Maybe just me.
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Re: Yet another vindication of the TBA
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Joined: Jun 2010
Posts: 1,193 Likes: 22
Learned Hand
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OP
Learned Hand
Joined: Jun 2010
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That's good to know.
Thanks
I took the Road Less Travelled.
Now where the ****** am I?
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Re: Yet another vindication of the TBA
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Joined: Sep 2015
Posts: 797 Likes: 17
3/4 Throttle
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3/4 Throttle
Joined: Sep 2015
Posts: 797 Likes: 17 |
Quote:
I switched to an aftermarket front sprocket for a while. It was all metal, didn't have the rubber pad and I didn't notice any more vibration than stock. Maybe just me.
My aftermarket did not have the rubber and have noticed no issues. I go between country and two lane roads to interstate. I find 5th gear of little use when cruising between 50 and 60 MPH. I will shift to it if I am on a long flat stretch. Seems when I am on the interstate everyone is doing 80-85 MPH and 5th gear at that cruising speed is such a pleasure. I am at about 4000 RPM at 75 MPH. Off the line it is fine. I have a tach, but mostly shift by ear. When you are shifting through the power range of the bike you just have one less gear to mess with, so I see no loss of performance at all. If you do mostly city riding or back roads then I would not change. If you do any interstate or long flat stretches the 19T is a pleasure. In theory it should raise the top speed of the bike another 10 to 15 mph, but that is not something I feel a need to test. I did go from around 140 to 160 to reserve. Not sure if that is the gear or how i have been riding lately. My daughter and wife ride with me most of the time and 2 up is no issue. Just a little more gas off the line.
Last edited by BillyIndiana; 11/06/2016 1:18 PM.
Road Rash Heals. Freckles Grow Back. Ride
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Re: Yet another vindication of the TBA
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Joined: Jan 2006
Posts: 7,701 Likes: 22
Monkey Butt
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Monkey Butt
Joined: Jan 2006
Posts: 7,701 Likes: 22 |
Quote:
Thanks Ron.I guess like Billy said,ride it like a 4 speed with overdrive.I do most of my running at 65-70 mph[110-120kph] with occasional higher bursts of speed to about 90[140kph],but only 60mph[The 100kph speed limit] if the cops are hot.How does your 19T go at those speeds?Do you use 5th gear?If not I may not have use for 5th much.
Its not a problem at all. 60+MPH 100KPH you just cruise in the 3000s range. If you are going to gently pass no need to shift down just twist it. To pass aggressively kick it down to 4th for a burst up into the 5500s range and you are past.
I ran a 19t all over the mountains in Arizona a few times with Dwight. Went up down and around just fine too. It is just a matter of acclimation. I love taller gears and no looking for 6th. I see no downside to it other than hole shot from a red light or drag racing.
A few bucks and a 30 minute change of primary gear gets it done. 30 minutes includes the beer break.
Remove primary cover
Break rear wheel loose
Loosen chain about 8 turns
Pull the gear, need a big socket
Install big gear, need a torque wrench
Twist chain/wheel back.
Secure wheel
Put primary back on.
Go riding.
Psst, don't pinch neutral safety wire in the primary cover.
I try to aggravate one person a day. Today may be your day.
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Re: Yet another vindication of the TBA
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Joined: Jan 2005
Posts: 6,681 Likes: 1
Bar Shake
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Bar Shake
Joined: Jan 2005
Posts: 6,681 Likes: 1 |
What Ron said.
"Catching a yellow jacket in your shirt at seventy miles per hour can double your vocabulary" Author unknown
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Re: Yet another vindication of the TBA
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Joined: Jun 2010
Posts: 1,193 Likes: 22
Learned Hand
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OP
Learned Hand
Joined: Jun 2010
Posts: 1,193 Likes: 22 |
That's great to hear... this'll be my first mod.
Al
I took the Road Less Travelled.
Now where the ****** am I?
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Re: Yet another vindication of the TBA
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Joined: Jun 2009
Posts: 3,995 Likes: 10
Loquacious
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Loquacious
Joined: Jun 2009
Posts: 3,995 Likes: 10 |
Thanks fellas.
It sounds Like I'm going to enjoy the 19T.
Sounds like at Red lights[and there's not that many out my way anyway], I'll just need to give it a little more throttle.
I'm looking forward to try it.
Dinosaur.
"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland
"Don't let the bastards get you down". Kris Kristofferson
"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville
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Re: Yet another vindication of the TBA
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Joined: Sep 2015
Posts: 797 Likes: 17
3/4 Throttle
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3/4 Throttle
Joined: Sep 2015
Posts: 797 Likes: 17 |
It is definitely one of the more cost effective and easy mods to do as Ron said. Just need to get a 36mm socket, and the torque on it is ridiculous. As tight as you can get it. Don't forget to bend the washer in a new spot.  
Road Rash Heals. Freckles Grow Back. Ride
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Re: Yet another vindication of the TBA
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Joined: Jun 2009
Posts: 3,995 Likes: 10
Loquacious
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Loquacious
Joined: Jun 2009
Posts: 3,995 Likes: 10 |
Dinosaur.
"Oh Man I only ride 'em.I don't know what makes 'em work". Donald "Oddball" Sutherland
"Don't let the bastards get you down". Kris Kristofferson
"I am only paranoid because everyone is against me". Larry [Frank Burns] Linville
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