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jreutzel

CRF 450 Sprocket Size

23 posts in this topic

I have a 2006 CRF 450. I need to replace the chain and sprockets.

I want to make the bike more trail friendly. I ride a lot of tight single track through the woods in Utah. I am thinking of going 13 on front and 51 on back. Does anybody have any thoughts on this?

Also, if i change the sprocket size, do I need to change from the stock chain length?

I appreciate any thoughts or feedback. Thanks.

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well whats your current gearing? If you are going up a lot in the rear you will proble need to add links to the chain. You may be able to get away with adding 2-3 teeth to the rear if the wheel is already adjusted all the way forward.

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13/50 should be stock. Depending on what you have on there now, you may be able to live with the chain you have. Its much easier to take links off then to put them back on, so be careful

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what ever size you get go for an ironman front and rear with a d.i.d. 520vm x-ring chain......this comba will outlast your bike!.......114 works with 13front-48,49,50,51 no problem

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what ever size you get go for an ironman front and rear with a d.i.d. 520vm x-ring chain......this comba will outlast your bike!.......114 works with 13front-48,49,50,51 no problem

what he said +1

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If you have an '06, 13/48 is stock gearing.

I am running 13/51 for trail riding, works pretty good.

Stock chain length will work fine.

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13/50 should be stock. Depending on what you have on there now, you may be able to live with the chain you have. Its much easier to take links off then to put them back on, so be careful

02'-03' are the only years they used a 50.

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If you have an '06, 13/48 is stock gearing.

I am running 13/51 for trail riding, works pretty good.

Stock chain length will work fine.

wat sort of riding do u do? i have an 06 crf450 and i bush ride a lot. i am finding myself running out of legs on the straights so im wondering Wat i should go with to get a bit of extra speed without loosing to much of the wheelie capability.

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I got a "kit" made up on ebay from Patrick Lytle. Steel front/rear sprockets and an DID o-ring chain.

I've actually bought a few things from him on ebay and have been completely satisfied. I think that I should of gone with at least a 51T rear or a 12T front as I still think the bike ('06 CRF450R) is still geared too tall for tight woods riding. If you email him and tell him what you want he can make up a kit for you.. You can find him ebay http://myworld.ebay.com/ebaymotors/lytleracinggroup/

I don't know this guy personally or have any affiliation. I've just gotten decent service / prices.

Patrick Lytle

info@lytleracinggroup.com

Qty Item ID Description Amount

1 JT28413 JT CS SPROCKET 13T 12.00

1 JT21050 JT REAR SPROCKET 50T 25.00

1 DID520VT120 DID VT ENDURO O-RING CHAIN 120 LINKS 99.00

Subtotal: $136.00

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I run an 06 with 13 - 52 and did not have to add a link. Watch your rear chain guide though for clearance. I have an aftermarket chain guide that fits fine but am uncertain about stock.

We ride single track steep hills. I can start on a steep hill and lug around 1700RPM (tach/hour meter) without problems. I do have an 11 oz flywheel which helps.

52 is tall, 51 would be perfect if you don't find yourself starting off on a cliff.

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I've got an '02, so my stock gearing was 13/50. Last year I ran 13/53 for trails. It worked well. For dunes, I ran 13/50, but three teeth difference is pushing it without needing more/less chain links. This year I've gone to 12/50 for trails and added a 33 oz flywheel. It works very well. Two side effects are reduced top speed (wasn't too bad at 13/53, but definitely noticable at 12/50) and it's harder to pull a wheelie now (likely due to the flywheel). But it is now very trail friendly based on a week's riding in Moab.

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i run the 13/50 witha did vt2 ,sunline sl1 sprockets on the rear,lasts along time.

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where do i get that after market chain guard that will accomodate a 53 tooth sprocket?

TM Designworks makes a chain guide that can handle a 53.

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