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Discussion Starter #1
Finally got my Superlites! (for the '19 D390)


Well, I wuz gonna name the thread "THey'RE HERE, thEY're heRE!!!"... but i was kinda afraid somebody might suh-lap me and tryta bring me back to my senses. Big News Flash: i don't H-A-V-E any! [don't want any, either]


but, Right... so what happened?


I ordered a 16 front and 43 rear, both steel, back on Oct 25. Apparently, the 43s were outta stock then (and 'still' are), but I managed to wrangle one up from the guys over at Rotweiler -- dudes saved my day.


So what I was shootin' for was something like [another gear], basically... because every time I got to 60 mph, I'd always be trying to shift up again (and couldn't get it into 7th, weird, right?)


It worked out on Gearing Commander that, with the sprockets switched, I'd catch 94 mph in 5th at 9,000, rather than 96 in 6th at 9K. That sounded like exactly what I was looking for, and it actually worked out... but it also had another really cool dividend I wasn't sure would pay off.


I've had this annoying habit of taking off in 2nd (a lot), because 1st gear is, to me, practically useless (unless I'm planning on pulling a boat up a bridge). Only problem with that is, taking off in 2nd is actually [just as borderline useful] as 1st... because, well-yeah, it's just way too much clutch sliding. And if I have a moment of spontaneous guilt, yeah, I end up stalling it.


But with the new gearing, the take-offs in 1st are spot on -- not too soft, not too hard; no wasted clutch slipping, and no panic that I already need to upshift. It's almost a Goldy Locks story, ya know? And well, it 'woulda' been, if I hadn't listened to myself (instead of someone trying to discourage me from doing 'both' sprocket changes).


Currently, No, I'm not experiencing any reluctance to [pull] in 6th. As a matter of fact, I think it feels like I'm in a fatter part of the fuel mapping. Hmmm...


According to my speedo, at 55 mph, my tach now reads 5,000 rpm in 6th gear; whereas b4 the changes, my tach read 5550 at 55 mph in 6th. In my opinion, it actually has a much better feel; roll on the throttle and she's fat 60-65-70 and even 'sounz/feels' different (as in better). And A lot less buzzing.


As soon as I get a chance to get out to the Interstate, I'll post back a follow up about how she pulls to the upper rev range (but I don't really drive there anyway). But if she 'does' pull clean to 90, and I managed to drop the revs by 900, well, WOOT!


Gotta go pedal the Trek for now. Anything else I notice, I'll tryta post back.


[oh ****, now I don't think I'm gonna sleep tonight]
 

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Discussion Starter #4
Great stuff, I just got the Super Sprox Stelth set for my first gen Duke 390
Yeah! I see that! What is that, 15 x 42?


I just got back from the Interstate myself. I was waiting a couple of days because the temperature dropped the day after I originally posted to this thread.


But good results all around... and quite frankly, I don't know why someone in the Industry tried to caution me against going with 16 x 43, read on.


At 7,000 it's rolling at 78 mph, strong and smooth; at 90 mph it's turning 8,000 rpm neat (and wants to go).


I'm thinkin' I'll call that a win, because I'm neither chasing traffic or holding it back.


Heck, I just cranked the throttle on and blasted up to, by and past everything I needed to get by or away from.


I [hope] that makes sense -- sometimes I think the best thing about spare power is the ability to move away from potential disaster that might be about to happen, and this gearing setup definitely has that.
 

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Discussion Starter #6
yeah... sorry, man. It was cold and I was all jacked up on Lit and caffeine. I'll tryta tone it down. :)
 

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Discussion Starter #7
I went on a 60 mile trip this weekend, to Bradenton and back, through the heart of Sarasota via US41...


Before the gearing change I recently made, my fuel mileage was always 72.7 mpg;


After the change to 16/43 sprockets, it jumped to 78.1. :rolleyes:


It's funny too, in a way, because at times I was forgetting I had another gear to use; other times it just wasn't a good idea to use it ~ too slow.


But like I said, as soon as I got above 60... yeah, click up. Pulls gr8.


[just followin' up]
 

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Discussion Starter #9
@DukeofSeven could you match you speedo to a GPS app on your phone at 60MPH for me? Thinking of doing this but want to know what the difference is.
Are you asking what the difference is between [the speedo reading] and the [phone GPS reading]?

If you really want to get a feel for what is going on by changing to this gearing...
go to Gearing Commander ⚙ , plug in your bike, change the 'custom' readings to what I'm now using for front and rear sprockets, scroll thru all the page functions, say brava!
 

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Are you asking what the difference is between [the speedo reading] and the [phone GPS reading]?

If you really want to get a feel for what is going on by changing to this gearing...
go to Gearing Commander ⚙ , plug in your bike, change the 'custom' readings to what I'm now using for front and rear sprockets, scroll thru all the page functions, say brava!
Sorry I was asking to see if it knocks the speedo off. I did a little searching after I replied and found that this bike gets speed from the front wheel so it doesn't matter. Thanks for the info on this setup though as I also agree that the gearing of the bike needs stretched out to delete first and make a shorter second the new first. Especially in cases like mine where I have added around 10% power from intake/exhaust/tune mods. Getting a kit ordered from sprocket center now.
 

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Are you asking what the difference is between [the speedo reading] and the [phone GPS reading]?

If you really want to get a feel for what is going on by changing to this gearing...
go to Gearing Commander ⚙ , plug in your bike, change the 'custom' readings to what I'm now using for front and rear sprockets, scroll thru all the page functions, say brava!
I will definitely check it out!
 
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