XR650R Gearing


10 replies to this topic
  • XR650R-Andrew

Posted April 16, 2006 - 02:49 PM

#1

I'm finding my 2006 XR650R is geared too tall. I'm only using about half of 4th gear. My question is what can I change my gearing to before having to replace the stock chain? I'm thinking I'd like to go with 13/50 gearing. Would I still be able to use the stock chain with this gearing?

Sorry if this question has already been asked, I didn't see it when I tried a search.

Thanks,
Andrew

  • Tber

Posted April 16, 2006 - 04:44 PM

#2

i went to a 13/51 and the chain was too small. i bought a new chain and i didn't like the gearing. It was too short. I compromised and went to a 14/51 and found it to be a perfect match. BTW the 13/51 gearing topped out about as fast as a yz250 two smoke on the top end.

  • Max Power

Posted April 16, 2006 - 06:14 PM

#3

I'm finding my 2006 XR650R is geared too tall. I'm only using about half of 4th gear. My question is what can I change my gearing to before having to replace the stock chain? I'm thinking I'd like to go with 13/50 gearing. Would I still be able to use the stock chain with this gearing?

Sorry if this question has already been asked, I didn't see it when I tried a search.

Thanks,
Andrew


No. You need a 112 link chain.

  • TimBrp

Posted April 17, 2006 - 02:49 AM

#4

13/51 is damn extreme if you ask me. I run 14/50(only two up on the rear) and it works fine in the tight New England woods. 14/51 would be the most I would do. After that 3rd gears becomes too short and 4th gear just doesn't cut it for trail cruising. With the 14/51 3rd gear becomes like (D) drive in a car and you just go.

  • XR650R-Andrew

Posted April 17, 2006 - 02:56 AM

#5

Thanks everyone. I'm starting to rethink how extreme I'll change the gearing.

I run 14/50(only two up on the rear) and it works fine in the tight New England woods.

TimBrp, did you have to change the chain or did the stock chain work?

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  • uncleroby

Posted April 17, 2006 - 03:44 AM

#6

My BRP mounts 14/48, I reckon yours too.

Why don't you go for a 13/48 as first step, it's a cheap and quick modification, no need to change chain.
After that you will realize if you need something shorter.

Uncleroby

  • TimBrp

Posted April 17, 2006 - 03:53 AM

#7

My BRP mounts 14/48, I reckon yours too.

Why don't you go for a 13/48 as first step, it's a cheap and quick modification, no need to change chain.
After that you will realize if you need something shorter.

Uncleroby



Good advice.

With the 14/50 or 51 you will need another chain. I, however, don't think you'll go back to the 14/48 anyhow and the smaller countershaft sprocket will wear on you slider more. Although, the downside to increasing your rear sprocket tooth count is that the axle spacers will need to be moved out more to accomodate the new, longer chain which puts your rear tire out farther and hinders cornering as the wheelbase is elongated. I may go back to the stock 48 tooth rear sprocket and just chuck a 13 tooth on there for the tight woods riding and put the 14 or 15 tooth back on for faster riding. It is much quicker and easier to do than the rear. Just keep an eye on your chain slider for wear, that's all. :thumbsup:

  • XR650R-Andrew

Posted April 17, 2006 - 08:29 AM

#8

Ok, I've got the 13 tooth sprocket on order and I'll try that out first.

Thanks for all the help. :thumbsup:
Andrew

  • snaggleXR650

Posted April 17, 2006 - 08:45 AM

#9

I agree with the 13/48 setup. I used it in tight Florida woods/trails and found it to be about perfect for tight/slow stuff. First gear is low enough that you can damn near idle around with no clutch. One tooth on the front is ~= to 3 teeth on the rear. So, one tooth change on the front will make a noticeable difference in gearing.

On the other hand, if your complaint is only the excessive top end speed and not necesarily that the lower gears are too tall, then adapt to the 14/48 gearing. The 650R simply has ALOT of top end that's hard to use anywhere but in the desert or on the street.

  • creeky

Posted April 17, 2006 - 09:06 AM

#10

Agree with the 13/48 gearing, excellent all around. If you gear the 650R too short, you are losing the advantage of all the low and mid range torque of this engine and you will be shifting too much.

  • needsprayer

Posted April 17, 2006 - 01:29 PM

#11

Been running 13/48 for a long time. Got a 15 on hand for street riding. Going to buy some Avon Gripsters for the Pig right after I bring home a 2007 250 2 smoke. :thumbsup:





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