'07 Needs New Sprockets & Chain

[Centrespike]

I have an '07 CRF450 and the rear sprocket is almost worn out. It's currently set up as 13/48, just wondering what front/rear (#of teeth) you guys are running for mostly SX/MX track riding.

Also, I guess I need to replace both front/rear as well as the chain so what is recommended? I put Sidewinder f/r & chain on my 250 2-smoke and have been very pleased with the durability but they are very expensive.

Not sure if this makes too much of a difference for sprocket ratio selection but my bike was built with a lot of Pro Circuit parts (I bought it that way) like piston, valves, cam, exhaust, pipe and whatever else PC makes.

Thanks,

CS

[crf-f crf-r trx cbr]

whatever size sprockets you get......i recommend the ironman sprockets and a did x-ring chain.....lots of m

oney but the best imho

[htrdmx55]

I just bought My stuff from lytle creek racing om ebay. I got a jt front and rear steel sprocket and an o ring chain plus the new bolts for 139.00. This is my second set of sprockets. My last set up was Renthal aluminum and lasted about a year.

[Trixter99]

Ijust ordered iromman spockets and chain for my new 07 crf450 and it was only 219.00 from them .I'm sure the renthal chain and sunstar sprockets were more than that for my 500 last year and ironman waranty them for a year.

[Supafreak_711]

15 hours so far, haven't even had to adjust it yet.

PS: I like to whore out this picture.

[moose drool]

Iron Man is the only way to go!

[red450]

I run 12/49 for MX, unless it's a high speed track (Glen Helen) or desert, then it's 13/49. I run Renthal front and back.

[sigterm]

For the track here in Hawaii, i run a 13/50 , ironman front, renthal back. DID vm xring chain. served me well so far on the new 08 450R. Been contemplating the ironman rear sprocket tho everytime i see that pic of

Supafreak_711's i drooool.

[Centrespike]

was wondering if anyone can explain the difference between o-ring, x-ring, z-ring and any other rings that apply to chains. Advantages of each? Cost? Durability?

thx

[CamP]

was wondering if anyone can explain the difference between o-ring, x-ring, z-ring and any other rings that apply to chains. Advantages of each? Cost? Durability?

thx

The x-ring has less friction and also seals better than a o-ring chain. I use to run the DID 520VM x-rings and they are superb chains that last 100+ hours. The only issue is they rub on the crankcase so a shim is necessary behind the countershaft sprocket to clear the case. I never really like offsetting the sprocket alignment like that so I installed the narrower DID 520VT T-ring chain this go around and it is holding up just as well as my old x-rings did, without having to mess with the chain alignment. I just made my first chain adjustment to the t-ring today after 15 hours and it was very, very small adjustment at that. I'd give the DID 520VT t-ring chain five stars. The only downside is cost. They aren't cheap but if you factor in how long they last, you'll be money ahead in the long run.

Gearing really depends on you and the tracks you ride. I prefer the stock 13/48 for the type of tracks we have around here.

[Centrespike]

The x-ring has less friction and also seals better than a o-ring chain. I use to run the DID 520VM x-rings and they are superb chains that last 100+ hours. The only issue is they rub on the crankcase so a shim is necessary behind the countershaft sprocket to clear the case. I never really like offsetting the sprocket alignment like that so I installed the narrower DID 520VT T-ring chain this go around and it is holding up just as well as my old x-rings did, without having to mess with the chain alignment. I just made my first chain adjustment to the t-ring today after 15 hours and it was very, very small adjustment at that. I'd give the DID 520VT t-ring chain five stars. The only downside is cost. They aren't cheap but if you factor in how long they last, you'll be money ahead in the long run.

Gearing really depends on you and the tracks you ride. I prefer the stock 13/48 for the type of tracks we have around here.

Thanks, what's the deal with the rivit master link? No clip?

[Centrespike]

also, any recommendations on Regina chains? Just thinking it would be easier to get the kit from Dirt Tricks and they offer Regina.

[CamP]

Thanks, what's the deal with the rivit master link? No clip?

Yes, the DID sealed ring chains utilize a rivet style master link which is typically found on street bikes. This style ML is much stronger than a clip style but requires a special tool to install the side plate and peen over the pins. If you have the right tool and you know what you are doing it only takes a few minutes to install. I use a micrometer to insure that I have the pressed the plate to the exact same width as the rest of the chain before peening over the pins. If you have never done this I'd suggest that you have a knowledgeable mechanic install it for you.

[motocrsr82]

Renthal all the way around period. 13/50 on my athena 488 based best. But my new 08 have not tried anything yet. But one thing, I dont really care for the stock gearing. Maybe just me but I am going back to the 13/50.

Flyn Ryan

[fxrs]

you did not mention your wieght makes big difference

[scantone1]

The x-ring has less friction and also seals better than a o-ring chain. I use to run the DID 520VM x-rings and they are superb chains that last 100+ hours. The only issue is they rub on the crankcase so a shim is necessary behind the countershaft sprocket to clear the case. I never really like offsetting the sprocket alignment like that so I installed the narrower DID 520VT T-ring chain this go around and it is holding up just as well as my old x-rings did, without having to mess with the chain alignment. I just made my first chain adjustment to the t-ring today after 15 hours and it was very, very small adjustment at that. I'd give the DID 520VT t-ring chain five stars. The only downside is cost. They aren't cheap but if you factor in how long they last, you'll be money ahead in the long run.

Gearing really depends on you and the tracks you ride. I prefer the stock 13/48 for the type of tracks we have around here.

I just picked up the t ring as well off ebay I got it for 70 bucks shipped witch is a deal! Also i got the tag sprokets form motosport in 13 50 i ride everything for terrain and love this set up. the only down side with the t ring is the master link is a press on so if you dont own the chain press you have to make freinds.

[Centrespike]

I like the idea of the narrow chain, any other brands and can one be found with a clip master link?

[Dr.Crankenstien]

14-52:thumbsup:

[skychicken]

I run the Ironman-DID ERT2 setup which= no spacer and you do have a master clip. The chain has held up very well. Also, if you have not considered this, I had to remove some links from the chain and had to buy a chain breaking tool for around 25 bucks.