Introduction
If you own a Bombardier DS 650, you already know it’s a beast on the dunes, trails, and tracks. But if you’re craving even more power and speed, the secret lies in a powerful upgrade: the DS 650 OMR carb mod. This simple yet effective modification can transform your ATV’s performance, giving you more throttle response, horsepower, and fun.
In this article, we’ll guide you through everything you need to know about this mod—what it is, how it works, how to install it, and how to get the most from your DS 650. Whether you’re a weekend warrior or an off-road racer, this guide will help you push your ride to the next level.
What Is the DS 650 OMR Carb Mod?
Basic Understanding of Carb Mods
A carburetor modification (carb mod) helps control the air-fuel mixture that goes into your engine. When done right, it improves combustion, which means more power, smoother throttle response, and better fuel economy.
Why OMR Carb Mod Stands Out
The OMR carb mod specifically made for the DS 650 is one of the best out there. Developed by Off-Motor-Racing (OMR), it focuses on adjusting fuel jets, needle positions, float levels, and air intake for optimal performance.
Benefits of the DS 650 OMR Carb Mod
1. Increased Horsepower and Torque
With the OMR mod, users have reported up to a 15% increase in horsepower. That means faster acceleration and more pull during off-road riding or sand dune blasting.
2. Better Throttle Response
The mod allows your engine to breathe better. You’ll feel quicker and smoother response when you hit the gas, especially at lower RPMs.
3. Fuel Efficiency
Believe it or not, with the right tuning, this mod can also improve fuel efficiency. That means fewer stops and more riding.
4. Cooler Engine Temperatures
A well-tuned carb reduces engine strain. That means less overheating, longer rides, and better engine life.
Who Should Use the DS 650 OMR Carb Mod?
This mod is ideal for:
- Off-road riders who want more power
- Racers looking to gain an edge
- DS 650 owners riding in extreme conditions (sand, mud, hills)
- Mechanics and tuners who want a cost-effective performance boost
It’s NOT recommended for:
- People unfamiliar with carb tuning
- Riders who want to keep the stock setup for resale value
Tools and Parts You’ll Need
Before installing the DS 650 OMR carb mod, gather these tools:
- OMR carb mod kit (jets, needles, gaskets)
- Screwdrivers
- 8mm and 10mm sockets
- Needle nose pliers
- Clean rags
- Carb cleaner
- A good service manual (recommended)
Step-by-Step Guide to Install DS 650 OMR Carb Mod
1 – Remove the Carburetor
- Turn off the fuel valve.
- Disconnect the fuel line and throttle cables.
- Remove the airbox connection.
- Unscrew the carb and take it out carefully.
2 – Disassemble the Carb
- Lay down a clean rag or towel.
- Unscrew the float bowl.
- Remove jets, float, and needle.
- Spray everything with carb cleaner and let dry.
3 – Install New Parts
- Replace the stock jets with those provided in the OMR kit.
- Adjust the needle clip position as per OMR instructions.
- Make sure float height is set correctly.
- Replace any gaskets or O-rings provided.
4 – Reassemble and Reinstall
- Rebuild the carburetor.
- Reattach all cables, hoses, and the airbox.
- Make sure the fuel valve is turned back on.
- Start the engine and let it idle.
Fine-Tuning Your DS 650 After the OMR Carb Mod
Idle and Air-Fuel Adjustment
Start your engine and adjust the idle screw until the engine runs smoothly. Use the air-fuel screw to fine-tune how the bike reacts when you rev it.
Throttle Test
Test throttle response in neutral. If it bogs or stutters, you may need to fine-tune the needle position or jet size.
Ride and Re-check
Take the DS 650 for a test ride. After about 10 minutes of riding, check:
- Spark plug color (tan = good, black = too rich, white = too lean)
- Throttle performance
- Idle quality
Common Mistakes to Avoid
- Wrong jet sizes – Always use the jets recommended by OMR.
- Skipping cleaning – Dirt inside the carb can ruin everything.
- Incorrect float height – This can cause fuel leaks or flooding.
- Not syncing carbs – If you’re using dual carbs, make sure they are synced properly.
Performance Expectations After the Mod
With everything tuned correctly, you can expect:
- Faster takeoff
- More top-end power
- Better handling in sand or hills
- Less engine bogging
Some users even report beating higher cc machines in a straight-line race!
How the DS 650 OMR Carb Mod Compares to Other Mods
| Mod Type | Power Boost | Cost | Skill Level |
|---|---|---|---|
| OMR Carb Mod | High | Low | Medium |
| Full Exhaust System | Medium | High | Low |
| Big Bore Kit | Very High | Very High | High |
| Air Filter Upgrade | Low | Low | Easy |
The OMR carb mod offers the best power-to-cost ratio among all popular DS 650 upgrades.
FAQs – DS 650 OMR Carb Mod
Q1: Is the OMR carb mod safe for my engine?
Yes, as long as you follow the instructions and tune it properly, it’s completely safe and can even improve engine life.
Q2: Can I do the mod myself, or should I hire a mechanic?
If you’re comfortable working on your ATV, you can do it yourself. If not, a mechanic can do it in about 1–2 hours.
Q3: Will this void my warranty?
If your DS 650 is still under warranty, any mod can affect coverage. Check with your dealer first.
Q4: Can I reverse the mod later?
Yes, you can easily return to stock parts if needed. Keep all original parts in a safe place.
Q5: Will I need to rejet for different altitudes?
Yes. Altitude affects air density, so you may need to adjust your jet sizes if you ride in different regions.
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