There’s nothing quite like the sound of your kid’s ATV firing up, ready for a day of fun on the trails. But that excitement can turn to frustration in a heartbeat when the machine won’t move, makes a horrible grinding noise, or just doesn’t feel right. I’ve been there, staring at a perfectly good engine running while the wheels do nothing.
You’re probably feeling that same frustration right now, searching for answers. You’ve likely run into some form of can am ds 90 transmission problems, and it can seem like a daunting issue to tackle, especially on a youth ATV.
I promise this guide will cut through the confusion. We’re going to break down the common issues with the DS 90 transmission in simple, practical terms. As a fellow rider and mechanic, I’ll walk you through the symptoms, the diagnostic steps you can take in your own garage, and when it’s time to hand the keys to a pro.
In this article, you’ll get a complete can am ds 90 transmission problems guide. We’ll cover everything from identifying warning signs and performing basic checks to understanding the best maintenance practices that will keep this little machine running strong for years to come. Let’s get those wheels turning again.
Understanding the Can-Am DS 90 Transmission: A Simple Start
Before we dive into troubleshooting, it’s crucial to know what we’re working with. The Can-Am DS 90 doesn’t have a traditional manual or automatic transmission like a car. Instead, it uses a Continuously Variable Transmission, or CVT.
Think of a CVT like a simple, automatic system perfect for new riders. It uses a thick, heavy-duty rubber drive belt that runs between two pulleys—a primary (or drive) clutch connected to the engine and a secondary (or driven) clutch connected to the gearbox.
As the engine revs up, the primary clutch squeezes the belt, changing its position on the pulley. This makes the secondary clutch spin, sending power to the wheels. It’s a simple, effective system that provides smooth acceleration without any shifting. Most of the time, the “transmission” issues on these machines are actually related to this CVT system.
Spotting the Warning Signs: Common Problems with Can-Am DS 90 Transmission Problems
Your kid’s ATV will usually give you clear signals when something is wrong. Learning to recognize these symptoms is the first step in diagnosing the issue. Here are the most common signs that point to can am ds 90 transmission problems.
Symptom 1: The ATV Won’t Move (Engine Revs, No Go)
This is the most common and alarming symptom. You start the engine, give it gas, and the engine roars to life, but the ATV stays put. It’s a classic sign that power isn’t making it from the engine to the wheels.
Most Likely Causes:
- Broken Drive Belt: The number one culprit. The CVT belt has snapped, so there is no connection between the engine and the gearbox.
- Worn Out Drive Belt: The belt might be so worn down and stretched that it can no longer grip the clutch pulleys effectively.
- Clutch Failure: Less common, but the primary or secondary clutch could be stuck or damaged, preventing it from engaging the belt.
Symptom 2: Slipping or Hesitation During Acceleration
You hit the throttle, and instead of a smooth takeoff, the ATV hesitates, shudders, or feels like it’s “slipping” before it finally catches and goes. This indicates a poor connection between the belt and the clutches.
Most Likely Causes:
- Glazed or Worn Belt: The sides of the belt have become smooth and shiny (glazed) from heat and wear, reducing their grip.
- Dirty Clutch Sheaves: The faces of the clutch pulleys (sheaves) are coated in belt dust, dirt, or oil, causing the belt to slip.
- Weak Clutch Spring: A spring in one of the clutches may have weakened, failing to provide enough pressure to grip the belt tightly.
Symptom 3: Grinding, Whining, or Clunking Noises
Unusual noises are your ATV’s way of crying for help. Pay close attention to when the noise happens—is it constant, only when accelerating, or when shifting into gear?
Most Likely Causes:
- Grinding/Whining: This often points to a failing bearing in the transmission case or a problem inside the gearbox itself. Metal shavings in the gear oil are a dead giveaway.
- Clunking: A loud clunk when shifting from Neutral to Forward or Reverse could be a misaligned shift linkage or, in more serious cases, worn or damaged gears inside the gearbox.
- Rattling at Idle: Sometimes a worn CVT belt can slap against the inside of the cover at low RPMs, creating a rattling sound.
Symptom 4: A Distinct Burning Smell
A burning rubber smell is a tell-tale sign of a slipping CVT belt. The friction from the slipping belt on the clutch pulleys generates immense heat, literally burning the belt material. If you smell this, stop riding immediately to prevent the belt from snapping.
Another possibility is burning gear oil, which suggests a leak onto a hot exhaust component or extremely old, broken-down fluid inside the gearbox.
Your Step-by-Step Can-Am DS 90 Transmission Problems Guide: DIY Diagnostics
Alright, you’ve identified the symptoms. Now it’s time to get your hands dirty. This section will show you how to can am ds 90 transmission problems can be diagnosed in your garage. Always prioritize safety first.
Before You Begin: Safety and Tools
Safety is non-negotiable. Before you touch a single bolt, make sure you follow these steps.
- Work on a Level Surface: A flat garage floor is perfect.
- Let It Cool Down: The engine and exhaust can cause serious burns. Give the ATV at least an hour to cool off.
- Secure the ATV: Make sure it’s in park or neutral with the parking brake set. If you need to lift it, use proper jack stands. Never work under a vehicle supported only by a jack.
Essential Tools You’ll Need:
- A good socket and ratchet set (metric)
- Wrenches
- Screwdrivers
- A drain pan for fluids
- Shop rags or paper towels
- A torque wrench (for proper reassembly)
Step 1: Check the Gearbox Oil
This is the easiest check and a great place to start. The gearbox on the DS 90 has its own oil supply, separate from the engine oil. Low or contaminated oil is a primary cause of internal damage.
- Locate the gearbox fill and drain plugs. Refer to your owner’s manual for the exact locations, but they are typically on the rear portion of the transmission case.
- Place a drain pan under the drain plug and remove it. Let the oil drain completely.
- Inspect the old oil. Is it milky (water contamination)? Does it have shiny metallic flakes in it (internal gear/bearing wear)? Is it extremely dark or thick? Any of these are red flags.
- Replace the drain plug and fill with the correct type and amount of gear oil. For the DS 90, this is typically a 75W-90 synthetic gear oil like the XPS brand, but always confirm with your manual. Do not overfill.
Step 2: Inspect the CVT Drive Belt and Clutches
Most common problems with can am ds 90 transmission problems originate right here in the CVT housing. You’ll need to remove the plastic CVT cover to get access.
- Carefully remove all the bolts holding the CVT cover on. Keep track of them, as some may be different lengths.
- With the cover off, you’ll see the drive belt, primary clutch (front), and secondary clutch (rear).
- Inspect the Belt: Look for cracks, fraying, missing cogs, or glazing (shiny, smooth sides). Squeeze the belt—it should be firm, not soft or spongy. Check the belt width against the service limit in your manual. A belt that is too narrow will slip.
- Inspect the Clutches: Look at the metal faces (sheaves) where the belt rides. They should be clean and smooth. If they are grooved, scored, or have built-up grime, they need to be cleaned thoroughly with brake cleaner and a Scotch-Brite pad. Do not use sandpaper.
If the belt is broken, worn, or damaged, it must be replaced. This is a common wear item and the solution to many “no-go” and slipping issues.
Step 3: Check the Shift Linkage
If your issue is difficulty shifting between Forward, Neutral, and Reverse, the problem might be as simple as an out-of-adjustment shift linkage. Look at the linkage rod that connects the shift lever to the transmission. Ensure the connections are tight and that the rod isn’t bent or obstructed.
Proactive Care: Best Practices for a Healthy DS 90 Transmission
The best way to deal with transmission problems is to prevent them. Following a good can am ds 90 transmission problems care guide will save you headaches and money. These are some of the best practices we follow at the shop.
The Importance of Regular Fluid Changes
Gear oil is cheap; gears and bearings are not. Clean fluid lubricates, cools, and carries away contaminants. Change the gearbox oil at least once a season or according to the hours specified in your owner’s manual. This simple step is one of the most effective can am ds 90 transmission problems tips you’ll ever get.
Drive Belt Maintenance and Break-In
Treat your CVT belt as a wear item, like tires or brake pads. Proactively replace it according to the service schedule, even if it looks okay. When you install a new belt, it’s critical to break it in properly. This involves riding at varying low-to-mid-range speeds for the first 20-30 miles, avoiding full-throttle starts and high-speed runs. This process seats the belt in the clutches and dramatically extends its life.
Riding Habits Matter
Teach your young rider good habits. Avoid abrupt throttle changes, don’t hold the throttle while on the brakes, and always come to a complete stop before shifting between Forward and Reverse. These simple habits reduce shock load on the entire drivetrain.
Sustainable and Eco-Friendly Transmission Maintenance
Being a responsible off-roader means taking care of our machines and our environment. The most sustainable can am ds 90 transmission problems solution is proper, preventative maintenance. A well-maintained ATV lasts longer, consumes fewer parts, and stays out of the landfill.
When you perform maintenance, follow eco-friendly can am ds 90 transmission problems practices. Never, ever dump used gear oil on the ground or down a drain. Used oil is a hazardous material. Pour it into a sealed container and take it to your local auto parts store or a municipal recycling center. Most places will take it for free. This simple act protects our groundwater and trails for future generations to enjoy.
When to Call a Pro: Knowing Your DIY Limits
DIY is empowering, but it’s also important to know when a problem is beyond your tools or expertise. Your safety and the machine’s reliability are paramount. You should strongly consider taking your DS 90 to a qualified technician if:
- You hear deep internal grinding noises from the gearbox.
- You’ve replaced the belt and cleaned the clutches, but it still slips badly.
- You find large metal chunks on the magnetic drain plug.
- The transmission case is cracked or leaking significantly.
- You simply don’t feel comfortable performing any of the diagnostic steps listed above.
There’s no shame in asking for help. A good mechanic can diagnose internal issues quickly and save you from causing more expensive damage.
Frequently Asked Questions About Can Am DS 90 Transmission Problems
What kind of transmission does a Can-Am DS 90 have?
The Can-Am DS 90 uses a fully automatic Continuously Variable Transmission (CVT). It relies on a belt and pulley system to transfer power, making it very easy for young riders to operate without needing to shift gears.
How often should I change the transmission oil on a DS 90?
Always consult your owner’s manual for the specific service interval. As a general rule of thumb, a good practice is to change the gearbox oil at least once per riding season or every 25-30 hours of use to ensure maximum protection.
Is a slipping CVT belt a serious problem?
Yes. A slipping belt not only robs you of performance but also generates extreme heat, which can damage the belt and the plastic clutch cover. If left unchecked, it will eventually break, leaving you stranded.
Why does my DS 90 clunk when I put it in gear?
A minor clunk can be normal as the gears engage. However, a loud, harsh clunk could indicate an issue with the shift linkage adjustment, a high idle speed, or, in more severe cases, worn internal gear dogs inside the transmission.
Can I use regular motor oil in the DS 90 gearbox?
Absolutely not. The gearbox requires a specific type of high-pressure lubricant, typically a 75W-90 or 80W-90 hypoid gear oil. Using engine oil will not provide adequate protection for the gears and will lead to rapid wear and catastrophic failure.
Tackling can am ds 90 transmission problems doesn’t have to be intimidating. By starting with the basics—the oil and the CVT belt—you can solve the vast majority of issues yourself. Regular maintenance is your best defense, ensuring that your little rider has a safe, reliable machine for every adventure.
Remember to work safely, take your time, and don’t be afraid to consult your manual or a professional when you’re in doubt. Now get out there, get those hands dirty, and get that DS 90 back on the trail where it belongs. Ride safe!
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