Question about 2002 Honda CR 250 R

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Chain keeps coming off

I have an off road Honda CR 80 and my chain comes off when I ride it, is this a common problem? is a new chain easy to fit?

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Make sure you only take out the excessive slack though, its important to leave some free play which can be measured with a ruler, if not you risk snapping the chain which is dangerous to your engine case and your ankles

Posted on Mar 23, 2012

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What you need to do is adjust the rear wheel to take up the slack in the drive chain.
You by now have possibly ruined both the sprockets where the chain need to be securely located.
To take out the slack the wheel spindle will have to be loosened and adjusted by the two clamps around it they are on each side of the swing 10mm nuts used for this purpose.
To replace chain and sprockets the wheel needs to be removed so I suggest purchasing a Haynes manual or similar to study involvement.
Good Luck!
Paul 'W'
Onyer~EDson(:0) {#><U.K.
Please remember to politely rate my effort!

Posted on Jan 21, 2009

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Honda XR600 has at least three very predictable wear problems. I'm referring to wear problems that go beyond the usual replacement items, such as chains, brakes and tires. The first problem usually occurs with the rear hub bearings, which in most cases develops at 6-8,000 off-road miles. You can tell if the bearings are bad by simply grabbing the rear wheel with both hands and applying back and forth pressure to see if there is play. If there is any play, replace the bearings immediately. If they go out on you while you're riding the bike, you'll probably destroy the entire hub assembly, which would be costly. The replacement bearings can be found at almost any auto supply house and will probably last longer than the stock Honda ones. It's not a big problem if you keep and eye on it. You should replace the front hub bearings at the same time. They won't be bad yet, but you can bet they will wear like the rear ones. It just takes a little longer.
The second problem is with the timing-chain tensioner. This is an internal engine mechanism that keeps the timing chain taught. You can tell if it is going out if you hear a clicking noise coming from your engine. It usually occurs at 10-12,000 off-road miles, and will continuously get worse the longer you let it go. Obviously, there are other reasons you can have clicking noises in your engine, but a worn timing-chain tensioner is a very common problem at that mileage. It's not an extremely critical thing to worry about at first, but don't wait too long. The more your timing chain slaps around, the more it will stretch and the more the repair cost. Most shops can do the repair in a few days, and it is covered by an extended warranty plan if you have it, but you'll have to take it to a certified Honda dealer for the repairs.
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