If you've spent any time out on the trails with a Yamaha TDub, you probably already know that keeping your tw200 chain in good shape is one of those small tasks that makes a massive difference in how the bike feels. The TW200 isn't exactly a speed demon, but it's a tractor that thrives on low-end torque and reliability. Because this bike often finds itself buried in mud, sand, or dust, that chain takes a serious beating. Understanding what kind of chain you need and how to look after it will save you from a nasty trailside repair or, worse, a snapped link that cracks your engine case.
Understanding the Stock Specs
When you start looking for a replacement, the first thing you'll notice is that the standard tw200 chain is a 428 pitch. If you're coming from the world of bigger dirt bikes or street bikes, you might be used to a 520 chain, which is Beefier and wider. The 428 is a bit narrower and lighter, which fits the TW200's modest horsepower perfectly.
Usually, the stock setup calls for 122 links. If you're running the standard 14-tooth front and 50-tooth rear sprockets, that's your magic number. However, if you've swapped your sprockets to get more top-end speed or even more crawling power, you might find yourself needing a link or two more or less. It's always a smart move to buy a chain with 124 or 130 links and just cut it down to size with a chain breaker. It's a lot easier to take links off than it is to try and find a way to safely add them back on.
O-Ring vs. Non-O-Ring: What's Better?
This is one of those debates that will go on forever in the TW200 forums. On one side, you've got the non-O-ring crowd. These chains are cheaper, lighter, and have a tiny bit less rolling resistance. If you're a racer trying to squeeze every decimal point of a horsepower out of the bike, maybe that matters. But for the rest of us, the non-O-ring chain's biggest flaw is that it wears out fast if you aren't obsessive about lubing it every single ride.
Then you've got the O-ring (or X-ring) tw200 chain options. These have little rubber seals between the plates that lock grease inside the rollers. They're a bit wider and more expensive, but they last significantly longer in harsh conditions. If you're riding through creek crossings, mud, or dusty desert trails, an O-ring chain is almost always the better call. It stays lubed internally, so even if the outside looks a bit dry, the pins and bushings aren't grinding themselves into metal shavings. Just a heads-up though: because the O-ring chain is wider, you need to make sure you have enough clearance near the engine case, though on a stock TW, it's usually not an issue.
The 520 Chain Conversion
You might hear some riders talking about "upgrading" to a 520 tw200 chain. This involves changing out both the front and rear sprockets to accommodate the wider, heavier 520 pitch. Why would anyone do this? Mostly for durability. A 520 chain is essentially overkill for a bike with 14 horsepower, meaning it will almost never stretch and could theoretically last the life of the bike if you treat it well.
However, there is a trade-off. The 520 setup is heavier, and you might feel a slight loss in snap because the engine has more mass to move. Also, your sprocket choices become a little more limited compared to the wide variety of 428 sprockets available for the TW. For most casual trail riders, the standard 428 setup is plenty, but if you're planning a cross-country trek on your TDub, the 520 conversion might give you some extra peace of mind.
Keeping It Clean Without Losing Your Mind
Cleaning a tw200 chain isn't exactly the most fun way to spend a Saturday afternoon, but it's the best way to prevent the "TDub stretch." If you let sand and grit sit on the chain, it acts like sandpaper, eating away at the metal.
You don't need a fancy setup. A simple grunge brush and some kerosene or a dedicated chain cleaner will do the trick. Don't use a wire brush—especially if you have an O-ring chain—because you'll tear those little rubber seals and ruin the chain instantly. Once you've scrubbed off the gunk, wipe it down with a rag and apply a good quality chain lube.
If you're riding in the desert or very sandy areas, look for a "dry" lube. These don't stay sticky, so they won't attract a thick layer of sand that turns into a grinding paste. If you're in a wet or muddy environment, a "wet" or wax-based lube will stay on better when things get sloppy.
Setting the Tension Just Right
One quirk of the TW200 is that the chain tension can be a bit finicky. Because of the long-travel suspension (well, long for a TW) and the way the swingarm moves, if you set the tw200 chain too tight while the bike is on a stand, it'll become way too tight when you actually sit on it.
A chain that's too tight puts immense pressure on the countershaft bearing, which is a repair you definitely don't want to deal with. It's always better to have a chain that's a little too loose than one that's a little too tight. Usually, you want about 35-45mm of slack while the bike is on its side stand. A good rule of thumb is to check it while you're actually sitting on the bike (or have a buddy check it). If it still has a bit of play when the suspension is compressed, you're in the clear.
Signs It's Time to Replace It
No chain lasts forever, especially on a dual-sport bike. You'll know your tw200 chain is on its last legs when you start seeing "kinks." This is when certain links don't straighten out as they go around the sprockets, usually because the internal lubrication has dried up or dirt has seized the link.
Another sign is the "pull test." Go to the very back of the rear sprocket and try to pull the chain away from the teeth. If you can see a significant gap or more than half a tooth, the chain is stretched out and needs to go. Also, take a look at your sprockets. If the teeth look like shark fins—hooked and leaning to one side—they're worn out. It's always best to replace your chain and sprockets as a set. Putting a brand-new chain on old, worn sprockets will just cause the new chain to wear out in half the time.
Final Thoughts on Trail Maintenance
The TW200 is a legendary bike because it's almost impossible to kill. It'll chug through just about anything you throw at it. But even the toughest bike needs a little love. Spending ten minutes every few rides to check your tw200 chain tension and give it a quick spray of lube will keep your rides smooth and quiet.
There's something weirdly satisfying about a perfectly adjusted, clean chain. The bike shifts better, it sounds better, and you don't have that nagging "what if" in the back of your mind when you're ten miles deep into the woods. Whether you stick with the stock 428 non-O-ring or go all out with a 520 X-ring setup, just keep it clean and keep it adjusted. Your TDub will thank you for it with years of trouble-free thumping.