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  # 1  
Old 01-05-10, 20:09
Rubu Rubu is offline
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Changing the front sprocket to one tooth smaller.

I have a new front sprocket with 14 spikes and I assume it is one tooth smaller than the original?

Do I need to cut the chain or will it go bolt-on?

Have You fitted one?
Is it better than the original ration for town and less than 120km/h speeds?
Does it give better acceleration?
  # 2  
Old 01-05-10, 20:33
weeksy weeksy is offline
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1. MAy go straight on, depends on how far on the adjusters your current wheel position is, the rear will move back about 2cm.
2. Nope, not to an XT660
3.Better ?
4. Yes increased acceleration.
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  # 3  
Old 02-05-10, 01:51
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Kev Kev is offline
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[quote=Rubu;127688]I have a new front sprocket with 14 spikes and I assume it is one tooth smaller than the original?

Do I need to cut the chain or will it go bolt-on? It will fit straight on, then adjust your chain.

Have You fitted one? Yes
Is it better than the original ration for town and less than 120km/h speeds? Yes, but your speedo will now over read, you need to fit a Speedo Healer to correct the speedo reading.
Does it give better acceleration? Yes much better.
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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

  # 4  
Old 02-05-10, 10:00
weeksy weeksy is offline
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I already find 1st gear quite short Kev, does 1st not feel a little ridiculous now?

How much effect on top end ?
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  # 5  
Old 02-05-10, 12:31
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Kev Kev is offline
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Quote:
Originally Posted by weeksy View Post
I already find 1st gear quite short Kev, does 1st not feel a little ridiculous now?

How much effect on top end ?
I have tried most of the ratios, it all depends where & how you ride.

15/45
15/46
15/47
16/45
14/45

I prefer 15/46 using a Stage 3 air box & Carbon cans.

With the big bore & hot cam 15/47 was best.
__________________
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


Last edited by Kev; 02-05-10 at 12:59.
  # 6  
Old 03-05-10, 21:12
Rubu Rubu is offline
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Will the smaller sprocket put the chain to eat the swings rubber?
  # 7  
Old 03-05-10, 21:59
xam xam is offline
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Where can i get a 16 tooth front sprocket?
I'll try 16/46 for longer distances.
At the moment im using 14/46 with 110 links.

greetz
xam
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