A 15/48T rear won't fit a 09 XTX.

I just fitted a 15/47T rear & had to grind a bit of the swinging arm away to move the axle forward so I could adjust the chain correctly.
:Driving_6XFY3G:

Sorry mate - I didn't know the swing arm had changed on the R. I've had both set ups on my 2004 and 2006 models.

It has not change on the R you are right Dave, I fitted a 15/47T on my 04 XTX with no problems.

I just added additional info for the XTX riders who have 07 on wards X's with the new style swinging arm, 15/47 won't fit unless you grind the swinging arm or go a longer chain.

So will putting a 14 on the front cause issues then.

A 14T front sprocket will fit straight on a XTX & XTR, your speedo will over read by 6.7%.

I use a Speedo healer V4 to correct my speedo reading.

http://cgi.ebay.com.au/Speedo-Healer-V4-0-and-Harness-Speedo-Tuner-Calibrator-/120621409011?pt=AU_Motorcycle_Parts_Accessories&ha sh=item1c1598a2f3

changing sprockets
 

Hey guys... been reading this old thread about changing sprockets because I want to give my bike a bit more bottom end power and also because 1st gear seems too tall on the bush tracks. As it is now I'm just idling along in top gear at 100km/h so I don't reckon I'll miss the top speed given the places I ride.

The fix is obviously going for a 14T front or (I was thinkin') a 48T rear. The issues about which option is better is not just financial. I have a 2011 XTR (so R-style swing arm) and I will soon add shorter dogbone links to raise the bike. This means the swing arm angle will be steeper... As such, to help keep the chain off the swing arm protector (whatever the correct name for that is...) I figured it'd be better to go a bigger back sprocket sprocket rather than a smaller front one... hope I'm makin' sense! i.e. a smaller front sprocket might mean the chain will rub on the swing arm pivot given the swing arm's increased angle with the shorter links...

My questions... is this even an issue? Is there enough adjustment to fit a 48T rear without having to replace the standard chain? If anyone has done this mod, is it worth it?

Appreciate your thoughts!

I have been using a 14 front for 13000km
 

And I prefer it to the 15/45 set up. My girlfriends XT660R (from the same year same roughly km) runs 15/45 and I get on it and stall.

Yeah... I agree. I found 1st gear on the XT pretty tall after riding other offroad bikes. Spend a lot of time slipping the clutch on tighter or rougher trails - can't be good for the clutch in the longer term. Plus it's just annoying. So I'm pretty convinced that I'll change the gearing but still not sure whether to go smaller (14T) front or bigger (48T) rear.

Front sprockets are obviously cheaper but, again, my issue is that the shorter done bones increase the angle of the swing arm so to ensure that there is a straight chain drive between the front and rear cogs (i.e. no rubbing on the swingarm pivot) it might be better to go with the bigger back sprocket. That is, a bigger diameter back cog will negate some of the effect of the increased swing arm angle.

I've read the threads and still can't find a definitive answer on whether the 48T rear cog will fit on the XTR with the standard chain. Someone must have tried that?? Kev says it won't fit on the XTX with standard chain but the swing arm is different on the X.

Plus keen to hear from those who have installed shorter dog bones about whether the have issues now with chain rubbing on the swing arm pivot - especially if they have also installed a 14T front cog.

'aveagoodweekend... Dan

On simular theme, I have an XTR and find it a bit high geared for trails - so if I fit a 14t front would a std chain be ok with 47t or 48t on the back?

It's not that hard to change over to 15/45 for the summer riding - is it?

Thanks in advance I don't plan on jacking my bike up

I've got a 2008 XTR and fitted a Supersprox Stealth 48t on the rear primarily to do the Oonadatta Track and the Birdsville loop. I also changed the front to a JT sprocket but kept the 15t because running chains around smaller sprockets will give accelerated sprocket and chain wear (or so the good books say:rant2:).

Sorry I can't comment about the chain because I also fitted a new DID 520 chain at the same time and just added the extra links - the gold looks real pretty too :bling:

Given the number of fixed speed camera's and general attentiveness of the local constabulary I also fitted a speedo healer soon after :gsmile:

Generally I found the lower ratio gearing to be beneficial with better low speed tractability and certainly the performance both off-the-line and in the twisties is somewhat more exciting :occasion14:

But it does get a bit buzzy especially riding the longer on road distances from Melbourne to the Great Oz Outback. If I did it again I'd probably compromise on a 15t front / 47t rear - just my 2 cents worth.