Triumphrat

yakoo11

ok... so when dealing with sprockets how do you know the right setup?

1 this is a dedicated track bike so I am ok with having multiple sprocket setups

I ask this because I was thinking about maybe going up to a 50 tooth in the rear.
I am currently -1/+2 and would like some more acceleration coming out of turns at some of the bigger/faster tracks.

I find that at thunderhill (predominately a big hp track) I am not competitive against newer 600's. I can have a guy completely beaten coming in to the final turn only to have him catch up to me close to the finish line. Now what I am seeing is that they just tend to put more power to the ground then I do. (which is true)... my dyno results had me compared to a built SV

I was talking to a fellow racer and he has a 50 on his r6 and completely tears me apart on the straight. You tend to not see much of 6th gear at THill so I am not too concerned about bouncing it off of the redline on the back straight (6,7,8,9) or the front straight (15,1) if I have too

any thoughts?

I like my setup for Infineon (sear point) and Reno Fernley... It was ok for Streets of Willow and I would need to look at more teeth for ButtonWillow

__________________
Matt
AFM #940
2001 Racing Yellow TT600

Will

You want to be just about to hit the rev limiter when you brake for the corner after the fastest part of the track, assuming there are no other issues. You may find this gearing screws up another part of the track for you, because you will be out of the powerband in a more critical area, like getting a drive onto the front straight at T-Hill. There's no set answer, and since you are riding a TT600, the chances of finding anybody to compare notes with is very small. It's all going to be trial and error.

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Will
It's a squid thing. You wouldn't understand.
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yimmit

here is a site that will work out roughly what changes to the gearing will make. although they dont list the tt they do list the speed four and daytona 600
http://www.gearingcommander.com/

Agkistrodon

anyone know what sprockets from other bikes fit these bikes? They dont list them in the sizes I want in parts unlimited.

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Agkistrodon "aka" billy badass

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Will

Front sprocket: '96-'97 ZX6r
Rear sprocket: '01-'03 GSXR

I'm about 99% sure of these. Other years may fit, but I don't know for sure. I used Vortex sprockets on my TT600, if memory serves.

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Will
It's a squid thing. You wouldn't understand.
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Go soothingly on the grease mud, as there lurks the skid demon.

Will

Are you planning to run a TT600 in the endurance racing? Vortex makes 675 sprockets, although they don't list them in their sponsored parts list on Sponsorhouse.

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Will
It's a squid thing. You wouldn't understand.
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GNTurbo6

Vortex makes sprockets for the TT600. I bought mine from sumofallparts.net

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'00 TT600
'87 GN

ncdave

I've found sprocket choices to be a real art when it comes to what works best at different tracks depending on the tightness of the course.

Attached is a spreadsheet that someone provided to me to have a better view of sprocket changes and power points. it might help you to assess power at different RPMs.

Attached Files

shift points Me.zip (26.8 KB, 4 views)

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NCDave
05 Kawi Concours, 03 Buell XB9R, 01 Triumph TT600,
99 Honda Superhawk
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pete2

Here's a few thoughts.

The right gearing setup is such that fits the track. In my opinion the less you _have_ to shift the better. You should always be in the rev range on your cornering speeds... so that the bike pulls strong but doesn't run out of revs right when you start opening the throttle. A bit below max torque. And of course tall enough, that you don't run out of revs on the straights.

R6 has a 48 rear sprocket as standard in the 99-05 models, so 50 isn't really that big for it... You can't really compare different bikes and their sprockets. I think the shortest gears I used, when I had an R6 were 14/53. In the Speed Four I have 14/48 if I remember correctly. In my opinion, that's starting to be even a bit on the short side. 2nd is essentially unusable. A gearbox with racing ratios would make it more better again with its taller low gears.

I haven't ever ridden a TT, but I don't think it's that much faster than a Speed Four. Any R6 is a lot faster than a Speed Four. The newer ones are in a completely different league.
Example 1: a few years ago I was riding my Speed Four and '02 R6 on the same day. Both bikes had BT002's. With the R6 I did 1.30 something and with the Speed Four 1.35 something.
Example 2: Last summer I rode my Speed Four (BT002's) and my ex girlfriend's completely standard '06 R6 (Pilot Powers, her suspension settings). Sadly, no AiM in use this time, but the people I was able to hang with but not overtake using the Speed Four were like moving chicanes with the R6.

So, being slower than an R6 is kinda inevitable in my opinion if rider skill is about equal.

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FART FYRA

yakoo11

yes yes and yes the less shifting you have to do the better,

... but I know my goal times are about 3 seconds off of what I want and I know I can make this up in a race but I would rather make it in practice as well. I have duplicate videos here of me on an 05 cbr600 and me on the 01 TT and it's pathetic. I can use the power more efficiently on the cbr and run the cbr 3 seconds faster... My times on the SV are 2 seconds faster. So i know right now that I am not riding the TT properly. Something is wrong somewhere. I got into discussion with EDR (eric dorn) and with TWF (Zoran) about some places where I am having issues on the TT and they seem to agree that it's more power delivery. I am just not putting the right power to the ground at the right time. We are going to work on my exit throttle application and see if we can't figure out how much sooner I could roll on. But my thought becomes is there a sprocket setting that would help put me in a better area of the powerband.

and I have worked out a few turns where I don't down shift prior to entry so I can have more throttle application on the exit.

__________________
Matt
AFM #940
2001 Racing Yellow TT600