The TSP Keihin Carb and High Compression Head work great on my 300cc XCW. Much better than the stock Mikuni. Power band is smooth and just keeps pulling, amazing. Raced 60 miles last week in the Nevada desert of which 10 miles was frozen ground, ice, snow. Kept it on 2 wheels on the ice and was able to pull hard on the dry dirt. Very strong and useable power. Will buy more products from SBM.

Just got back from racing. My kids first race ever.
He placed 5th overall in the 250 beginners class. In reality he was 2nd. 1-3 were sandbagging the class They rode several levels up also and played towards the top. He’s beyond happy with how his bike is running. Absolutely ripping. He was pulling on 250f’s. Once we get the photos back he’s going to do a full review on the TPI page and tag you guys and TSP. This could get expensive!! Thanks again.

Just got myself the newest bike I have ever Had!! A Husqvarna TE 300 2021. I have a 2004 EXC 250 KTM.
The Husqvarna has no paperwork with it Except the registration documents. IT has a Performance Ecu And Head installed. I have taken the bike apart for inspection before I ride it. Sent the information to Steve regarding the identification of the head. He has spent time and effort to tell me the type installed on the bike and its a medium compression. I am thanking them for the super fast response for the information as I did not buy the parts from them. But I will be back.

I received the kit yesterday afternoon and installed it right away, thank you for the immediate turnaround! I thought I’d give you a quick “first ride” impression/review.
 
2021 GasGas EX300 South Bay Moto Performance/TSP Power Kit First Ride
 
I warmed the bike up and took it for a quick test/setup ride. You were right, the difference was immediately noticeable! Better pull from down low and a MUCH smoother transition into the mid-range. Now I can easily do low speed balance point wheelies and not worry about getting hit with that sudden mid-range surge that was there before (when I would occasionally get up into the rpm’s a bit). So much easier to control (and safer) and it sounds much better now too! Like it’s crisp and well-tuned. I played with the air screw settings as suggested in the kit but ended up with it back at its original position of 3.5 turns out. That’s where it seemed to run best off idle and at low throttle settings; maybe it’s because I’m at about 4750 feet above sea level here. I couldn’t tell any real difference between air screw settings at higher throttle openings. The idle speed at this air screw setting was basically perfect at about 1470 rpm, so I haven’t installed the idle screw modification yet. We’ll see if I decide I want/need to install it after running at other elevations, but the stock idle setting seems fine for here so far.
 
Anyway, I’m super happy with the kit so far and can’t wait to get it out into some terrain for a more thorough impression in varied conditions.

Wanted to thank you for all the help on the phone the other day with the “power valve flutter” I was experiencing in the mid range under load (primarily in the snow). Adjusted power valve to about a millimeter from flush, slightly less than it was stock completely solved the issue. TE300i, medium comp head, air screw .5 turns, idle screw installed after a couple rides. The bike is running fantastic, most dialed in 300 motor I’ve ever ridden. Super pumped for the upcoming race season. You should have a few eager customers heading your way soon.

Got the bike out a few times since the install and man oh man I am stoked.. The power band is exactly as I wanted from the bike since day 1 … We ride a lot of trials bikes around here and the off-idle torque feels like my trials bike which is amazing.
I’ll be sending more customers your way as soon as they get to try my bike … Even though it’s sled season I’ve been going out and riding my bike a lot!