We put an XCW cylinder on a 2023-2025 300 XC, and we gained almost 3 foot pounds of torque, and 3 extra horsepower from idle up to 7,000 rpm. The 300 XC already had our TBI Power Bundle mods in place. The bundle includes our TBI Power Mapping, Oversized Exhaust Valve Cover, Billet Crank Case Pressure Sensor Holder, 90 Degree Fuel Rail, Spark Plug and our Power Reed Strips. This Power bundle is available on our website and makes for a great foundation for your build. Then we just switched the cylinder, along with the cylinder head, and put a new piston in it. It also requires a different base gasket. The lower port timing with the XCW cylinder adds that bottom end grunt your looking for. This is the bike that the XC should have been, and you can do this for around $1,000. If you're interested in making this happen, you can get in touch with me, and I will help you get together everything you need including the base gaskets. Before you go there though, we strongly recommend you install our TBI Power Bundle to start. Visit PinitRacing.com

The best thing I've done with this KTM 300 XC is switch out the cylinder with an XCW cylinder. Everything else remained the same on the bike. It lowers the transfer port timing by 10 degrees. You do need a new cylinder head insert and base gasket. Here I'm at 3,600 feet, but even down at sea level it performs well. It makes this bike a total tractor. It will cost you about $1,000 to make the swap. Watch me go up this hill in 5th gear without touching the clutch while traveling close to idle speed, just modulating the throttle. You can hear it's just pulling really well. Definitely a fun little upgrade. Visit pinitracing.com

We're testing out our KTM 300 XC build in Arizona dirt. After all the mods and dyno work, it's time to see how this bike really rides, using just 91 octane gas. Come along for some single track soft enduro riding. We have a spark plug with a 7 heat range, and it looks good after all the riding. This bike had a lower compression head at 178 which worked very well here. We had our reed strips installed, our oversized exhaust valve cover, crank case pressure sensor holder, our aluminum fuel rail, flexible idle screw and an upgraded lithium ion batter. Of course our ECU performance mapping on top of all this made for a much improved experience. This is a great bike for an XC platform if you're racing moto, XS and cross country desert stuff. Parts and mapping available at PinitRacing.com

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When going to rebuild the top end of your KTM / Husky TBI 2-stroke, there are 4 important things to look for, and I will go over each one here: Piston and Cylinder Head Condition - Scratches on the piston is one thing to make note of. We also look for scratches in the cylinder head. The cylinder head scratches can be cleaned up with a ball hone hand drill attachment if you have one handy. You can replace the piston if the scratches are bad. In our instance, they don't look bad, so will leave as is. Condition of Piston Ring - I also look at the piston ring as well, making sure the face of the ring has been cut in properly. It should look shiny and flat all thew ay down the face. This means it's broken in properly and seating fully. Sometimes synthetic oil can prevent the ring from wearing in properly, requiring a shift to petroleum based oil until it does. I use legend oil which is half petroleum and half synthetic. You can also use tech break in oil. Then you can switch back to fancy synthetic oil after. As your rings wear in, your compression should go up. Cylinder Base Gasket - Cylinder base gasket is worth taking a good look at as well. The TBI bikes don't come with sealant on the gaskets. I use clear RTV silicon on a fresh gasket during the rebuild for a better seal. O-rings - Replacing the O-Rings with the proper size O-Ring is important. Many aftermarket rings are off by a bit, and can cause you to run low compression. American sizes are slightly smaller. It's best to get the OEM stock or appropriate metric size O-Rings for proper rebuild results.

Why does your KTM / Husky TBI 250 / 300 seem to idle low? It doesn't have a capacitor. What it does have though is a headlight, and this puts extra demand on the battery when the bike is at rest. The idle adjustment screw doesn't really solve the problem. What does is this Lithium Ion batter from BS. Specifically the BS Li 02 Max battery. It fits nicely on the bike. It gives you peace of mind, better throttle response and a bit more snap off the bottom while solving your low idle issues. Available at www.pinitracing.com

A bad problem just got worse. When riding hard, the intake tabs on the stock piston on your KTM TBI 300 are at risk of making contact with your crank arm. This is a known issue. At this point, you'll need a full top-end rebuild. It's best to replace the stock piston before your engine explodes, especially if you own a 2025 KTM TBI. The 2025 KTM pistons are made by a new piston manufacturer. They are not made by Vertex anymore (which still ran the risk of contacting the crank shaft), and the new pistons for 2025 are slightly longer, making the existing issue even worse for 2025 TBI 250 / 300 bikes. Don't wait for your top end to self destruct. Cut your piston intake tabs down 2mm and save yourself a ton of pain down the road. Visit pinitracing.com