41T rear

[Stupify]

So I put the bigger sprocket on the Tiller last night. WOW! It's much quicker now. I'm liking it. How off, if at all did it throw anyone elses' speedometerss off. I'm not noticing much of a difference.

[dsly1]

12.5% was my 16 T front.. your around that ball park as well.. TLS Steve will have the acutally math for a though

[horkn]

amazing what 2 teethin back will do, isnt it?my speedo is off a little, with the 40 in back versus the 38 stock. steve will let us know...

[Cyntax]

I just got a chance to try out my new 41tooth rear this morning. I agree, its amazing what a difference it makes. I'm really happy with it.

[yeller_twin]

Do you need a longer chain? Previous owner didn't take care of the chain and it's in sad shape. Figure if I am getting a new chain I might as well change sprockets too. Who needs such a tall first gear. Feels like I'm riding a Buell, they need such gearing cause they lack in the RPM department. Tiller's don't.

[Rupes]

Heres an excel file to pinched of Steves site
right click and save as

http://tl1k.com/Usefull%20tools/tl_gearing.jpg

[horkn]

nope, they fit on the stock chain..

[KBOlsen]

Steve posted the formula for calculating the variance not too long ago... I think we figured my 16/46 is something like 3% off.

Steve?

[Stabber]

I run 16/41 and with a sigma bike speedometer showing 60 my stock speedo says 69. Kim I bet yours is off by about 15% but that just a guess

[Steve TLS]

TLR

Std 17/39 = 2.294 = standard speedo error
2up 17/41 = 2.411 = standard speedo error + 5.1%
1dn 16/39 = 2.4375 = standard speedo error +6.25%

And for Kim,
16/46 = 2.875 = standard speedo error + a whopping 25.3%


Just divide rear by the front i.e 39/17 and you get the standard base of 2.294:1 now do it for your new sprocket combo i.e 41/17 = 2.411:1, the difference is new/base so 2.411/2.294 = 1.05128 that is 5.128% difference. (1 being 100%)

TLS is all different because the standard base is 17/38 = 2.235:1 and 2up is 17/40 = 2.322:1 = 5.263% difference.

[Stabber]

What would mine be with 16/41 on my TLS

[Steve TLS]

17/38 standard = 2.235:1
16/41 Stabber = 2.5625:1

= 1.146 so your speedo error is the original error wit hstandard gearing + an extra 14.6%

16/41

[TLs-Ryder]

I went up 3 in the rear from the standard 38 to 41 also (steath sprocket) aluminum body steal teeth.
And it pulls like a banshee

[TLs-Ryder]

steel teeth

[Stabber]

Originally posted by Steve TLS
17/38 standard = 2.235:1
16/41 Stabber = 2.5625:1

= 1.146 so your speedo error is the original error wit hstandard gearing + an extra 14.6%

16/41

So my gearing is 14.6% different than stock right You have to bear with me I sat at the back of the short bus