Home

Go Back   .: XT660.com - The #1 XT660 Resource :. > XT660 Tech Section > Performance Modifications & Enhancements > Brakes, Wheels and Final Drive
FAQ Calendar Search Today's Posts Mark Forums Read Main site

Google

Reply
 
Thread Tools Display Modes
  #1  
Old 21-07-08, 12:16
g-tec g-tec is offline
Junior XT-Moto
 
Join Date: Jun 2006
Location: Novi Sad
Posts: 20
g-tec is on a distinguished road
Rear sprocket for XT660R

Can someone tell me from which bike I can put rear sprocket with more theets(47 or 48) on XTR
Thanks
  #2  
Old 21-07-08, 13:21
CaptMoto's Avatar
CaptMoto CaptMoto is offline
The Guv'nor
 
Join Date: May 2006
Location: London
Posts: 4,263
CaptMoto is on a distinguished road
Hello gtec, sorry can you explain a bit more in details what you intend to do?

Am I right to assume you want to increase your sprocket pitch by a couple of teeth?

Standard pitch for the rear sprocket is 45 teeth and 15 for the front one, you can see the reaction in revs/power when increasing number of teeth using the attached spreadsheet.

If you need details of a good suppliers please check out B & C Express here:
http://www.bandcexpress.co.uk/cgi-bi...l?cat=SPR-ROAD
__________________
This message is for all new joining members, I recommend you take in as much as you can of

this forum and it's content, by copying important stuff onto your own machine.

This forum will close down on Dec 31st 2019 after 15 years of being online.

Thank you


Last edited by CaptMoto; 16-06-11 at 23:52.
  #3  
Old 21-07-08, 14:02
g-tec g-tec is offline
Junior XT-Moto
 
Join Date: Jun 2006
Location: Novi Sad
Posts: 20
g-tec is on a distinguished road
I know that standard is 45,I want to put 47 or 48 because friend told me(he also has XTR) that he tried one with 48 teeth on rear sprocket and he said that bike pulls incredible and bike is just little slower,170-160km/h
  #4  
Old 21-07-08, 18:21
maxwell123455 maxwell123455 is offline
XT-Moto SuperStar
 
Join Date: Jul 2007
Location: Edinburgh, Scotland
Posts: 1,955
maxwell123455 is on a distinguished road
Quote:
Originally Posted by g-tec View Post
I know that standard is 45,I want to put 47 or 48 because friend told me(he also has XTR) that he tried one with 48 teeth on rear sprocket and he said that bike pulls incredible and bike is just little slower,170-160km/h
If you want better pick up like your mate did its easier and cheaper to go for a 14 tooth front. Very cheap at only £10 or so from BandC express. It does drop the top speed by a few mph but isnt anything massive. It makes the bike pick up alot easier, you can near wheelie in 2nd with out the clutch and easily in 3rd with the clutch, and it also makes the bike feels as if its more free'er revving.

But changing the sprocket sizes means its changes your speedo read out. Not by much, if you get the 14 tooth sprocket at a indicated 70mph your only doing 65mph in real life. You can buy a speed healer if you want but most dont bother
__________________
Plough on
  #5  
Old 21-07-08, 20:09
g-tec g-tec is offline
Junior XT-Moto
 
Join Date: Jun 2006
Location: Novi Sad
Posts: 20
g-tec is on a distinguished road
Yes I know if I put rear 47 then when speedo shows 170 it is realy 163km/h,with front 14 it is 159km/h
  #6  
Old 21-07-08, 22:43
Kev's Avatar
Kev Kev is offline
Administrator
 
Join Date: May 2006
Location: Brisbane, Australia
Posts: 6,067
Kev is on a distinguished road
I ran a 15/47 sprockets on my XTX for a while. I used a Speedo healer to correct the speedo. The bike is great for the hills & around town but reved high on the freeway.
__________________
Click here to join the XT Supporter's scheme

Mods that I have done to my XTX's

My 04 XTX
Stage 1 & 2 DNA filters / Kev fuel mod / snorkel mod / Drilled air box mod / Engine breather mod / Fork Spacer mod / 15w fork oil /
[
My 07 XTX
Raptor 700 cylinder 102mm / Modified Crank Case to take a 105mm Raptor Cylinder / 11:1 102mm JE Raptor piston / Stage 1 Raptor Hot Cam / Ported head / Colder Spark Plug / +2mm Throttle body / DNA stage 1 & 2 filters / Modified Air Box / Snorkel removed / Worry Brothers stage 2 filter cover / 6mm & 8mm Bolts Replaced with Titanium Bolts / Recovered seat in Black / O2 Eliminator /

My 09 XTX
59HP at the rear wheel / Stage 2 Raptor Hot Cam / DNA stage 3 Air Box / Carbon Can Exhausts / Modified Exhaust Link Pipes / PCIII With Custom Fuel Map / Wideband Commander O2 Data logger / LCD100 Dyno Jet display & fuel adjuster / 2500 OHM HT lead instead of a 10K OHM XT lead / Extra Coolant Cooler / Protaper Fat Bars / Tail Tidy With LED Tail Light / OKE Protection Knobs / LED indicators / AIS blocked / Modified rear sprocket rubbers / Rear Foot Pegs removed / 09 ECU With 02 Sensor Changed To A 06 ECU / Complete wiring harnes Changed from 09 to 04 / Home made LED resistor flasher / Hole drilled in the fuel tank filler neck to allow quicker filling / Modified Bar End Weights / Progressive front fork springs, 15W fork oil, forks lowered 25mm, used XTR rear links lowering the rear 20mm, rear spring one click stiffer / Changed front & rear guards from blue to black / 47T rear sprocket / Speedo Healer V4.0 / Kev throttle cam mod / Throttle grip mod / The new 2010 O2 sensor mod is out, works a treat, The new 2012 O2 Controller is out, PM me for details

Now ride a 2018 MT09SP ABS + TCS

My KTM 990 SMR Mod book. http://www.ktmsmt.com/viewtopic.php?f=13&t=4946

  #7  
Old 19-09-10, 08:46
richardsracingmad richardsracingmad is offline
XT-Moto SuperStar
 
Join Date: Jul 2010
Location: the South
Posts: 875
richardsracingmad is on a distinguished road
I want to change from a 15t to 14t front sprocket.

Will the chain need shortening?


or....if keep the standard front 15t, and go 48t rear, will I need a link put in the chain?
Sponsored Links
  #8  
Old 19-09-10, 09:36
berserkers berserkers is offline
SemiPro XT-Moto
 
Join Date: May 2009
Location: SZCZECIN
Posts: 35
berserkers is on a distinguished road
For XTR you have JT SPROCKETS 47 and 48 teeth ( JTR855-47 or JTR855-48 )
  #9  
Old 19-09-10, 11:00
motonacio's Avatar
motonacio motonacio is offline
XT-Moto SuperStar
 
Join Date: Jan 2007
Location: Here and There
Posts: 404
motonacio is on a distinguished road
Quote:
Originally Posted by richardsracingmad View Post
I want to change from a 15t to 14t front sprocket.

Will the chain need shortening?


or....if keep the standard front 15t, and go 48t rear, will I need a link put in the chain?
No and no.

There is enough adjustment in the chain to cope with either of those changes.
__________________
My Mods | TLC | A good spannering | Kev's brilliant Mods & advice via XTSupporters - Best £10 ever spent.Lucid Puppy && SeaMonkey - Wubi - - Boinc - electric sheep

"Strive to be the person your dog thinks you are"


  #10  
Old 19-09-10, 11:09
richardsracingmad richardsracingmad is offline
XT-Moto SuperStar
 
Join Date: Jul 2010
Location: the South
Posts: 875
richardsracingmad is on a distinguished road
thanks Monty
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT +1. The time now is 21:54.
Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2019, vBulletin Solutions Inc.

  XT660         Archive   Main site


Footer
vBSkinworks Top