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?? Chain question on 2001 YZ250F ??
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Posted by: revitup---------------------
I bought a used 2001 YZ250F. New to the sport. I'm not sure what kind of chain it has on it. The book says it has a:
DID520DMA2/DAIDO
Is this a non-Oring chain, an O-ring type chain? I couldn't find the part# on the internet.
Also, what's the difference between 520 and 530 when looking at chains?
Thanks!
Posted by: Chief---------------------
Revitup,
Usually the chain that comes from the factory has a part # that you won't find anywhere. A 530 would be bigger than a 520. Most all full size bikes (125's-250's) use 520. From your part number you can tell it's a 520. If you want to know whether you have an o-ring on it or not look at the chain from the back of your bike (top or bottom veiw of chain, not side) where it's on the rear sprocket. There will be a gap between the side plates where you can see the small o-rings that fit on the pins of the chain. If it's not an o-ring, the plates will be flush.
The size of the chain matters ie: 520, 420 etc so match that up. Count the number of links on your chain. (use the master as a starting point) You can't always trust the dealer or shop or your manual for length specs. Most shops specify my bike with a 50 tooth rear sprocket and 116 link chain, but mine came with a 49/112 from the factory.
An o-ring chain is slightly wider than a non o-ring. On most bikes there is room for either type, but I would run a post to ask others with the same model to be sure. Order a few master links to go with it. My masterlink seems to get beat up a lot quicker than the rest of the chain and is generally the weakest link on the chain. I just replaced one yesterday because the clip wasn't really seating well.
Other than that, the choice is yours as far as what brand or type of chain you want. Do a search on chains, there is a ton of posts on chain selection. You will get the most info that way since not everyone is going to repeat what they said 10 times already. Then if you still have a question feel free to post.
btw, I currently have a regina o-ring that seems to be holding up well, and have a renthal r1 works chain and primary drive sprockets that will go on next. Don't drive yourself crazy looking for the perfect chain. If you buy a decent one and give it a little regular attention it should last at least one season or more.
Good Luck,
Chief
Posted by: revitup---------------------
Thanks for the quick response and useful information. I'm doing research on how to maintain the chain and wanted to know more about what type I actually had. Thanks!
Posted by: yota---------------------
I put an RK o-ring chain on my 250f and after about 6 or 8 months the chain guide wore almost thru the master link clip and wore a lot of metal off the master link itself. I barely caught it in time and I can't believe the clip stayed on in the shape it was in. One of the clip legs was completely off the pin. I ordered a new master link a couple of days ago and will have to modify the guide somehow so it doesn't chew up the new link.
Posted by: zcookie49---------------------
I just got a DID O-ring (they call it x-ring) chain, it is a 520. I hope they put it to size or I will need a chain breaker. I bought it from MR.X back in January, with Renthal rear sprocket and rocket frt sprocket, combo deal of $89.95. very good deal. I waited till this past weekend to put it on with my new rear tire for my first harescramble.,Well, the front sprocket was a 14T and for a Yz250, not 250F, so it didnt go on. I called MR. X monday, they were totally professional, told me to keep the 14t sprocket, will send another one to me right away... What more can you ask for?!!!!
I will let you know how the chain works out...
BTW, I hear the chain guides on the 4stroke yamahas wear out easily over time.
Posted by: Chief---------------------
Yota,
Sounds like the exact same thing that is happening to me. I know where it is wearing and plan on replacing masterlinks until it's time to replace the chain. (the renthal is non-o-ring).
Keep an eye on your case as well. I found my case was pretty heavily grooved until I started lining up the sprockets perfectly. Now I mark the grooved area on the case with black permanent marker to make sure there is no more contact. So far so good.
Revitup: Honestly, if I was you I'd just go with the standard non- o chain. You already have 2 guys (one with the same bike) telling you it's not quite working out. You'll have plenty of other problems to worry about. Why not save the aggravation and go out riding instead? Another strong recommendation, use honda dry film lube, it's a red and black can, dries to a waxy finish, rust protection. and leaves your chain sparkling clean. All I can do when I see my buddy glooping on the silkolene brown bubbly tar is shake my head. He will barely put up with my suggestions so I basically keep my mouth shut.
Your rockin' rollin' dirtbikin' Friend,
Chief
Chief
Posted by: revitup---------------------
Thanks for the info guys...I had no intention of replacing the chain right now just wanted to no what kind I have. It is indeed a non-Oring type. From what you guys are saying, looks like I should keep an eye on certain things like the the chain guide, case, and master links.
BTW, what do you mean by "Keep an eye on your case as well"? What's a case?
Thanks, revitup
Posted by: yota---------------------
Chief, thanks for the tip, I'll check my cases tomorrow.
Posted by: Chief---------------------
Revitup,
I was referring to the area behind the front sprocket. You would have to take the sprocket off to get a good look at it. Yea, there's one part I'd rather not replace 
Chief
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