https:// www.pinitracing.com

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

Here is the list of things we are going to start out trying in 2025. This applies to the 2023-25 KTM / HUSKY 300 SX / XC / TX / TC https://www.pinitracing.com

This battery is the most powerful battery you can get, that will fit in the stock compartment. Even on the 23-25 new frame bikes. This "max" version gives 180 cranking amps, which is more than anything else out there. When a battery is all you have to start your bike, and you're out there in the cold, you'll always be glad you didn't skimp. Available at pinitracing.com

Get our new KTM / Husky snow bike All Altitude dual mapping for 2 and 4 stroke 2023-2025 bikes. Get the dual mapping for $375, or both the mapping and switch (if needed) for $500. With two maps, you can add the needed ignition timing to the bikes necessary for them to perform at higher altitudes. This mapping gives you the much needed power boost that higher elevations suck away. See if your bike is a candidate. Mapping and Switch Available at www.pinitracing.com