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SouthBayMOTOPerformance
TWO STROKEWe provide the best tune and set up for two strokeShop Now!
motorcycles to maximize performance while maintaining
reliability for both competitive racers and trail
enthusiast of all skill levels. -
Exclusive Dealer for
South Bay Moto Performance is proud to be the exclusive distributor for allLearn More
Two Stroke Performance products sold in the US and Mexico. -
TWO STROKE PASSION
PERFORMANCEToday's modern machines need modern solutions.SHOP NOW!
Let South Bay Moto Performance help you go fast and stay strong on the trails.
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Exclusive Dealer for
South Bay Moto Performance is proud to be the exclusive distributor for allLearn More
Two Stroke Performance products sold in the US and Mexico.
South Bay Moto Performance is proud to be the premier distributor for
Two Stroke Performance products sold in the US and Mexico.
Specializing in off road motorcycle, two-stroke performance parts:
- CNC Billet Cylinder Heads – multiple options designed for specific rider preference
- TPI Power Kits and Carb Power Kits – all parts designed and matched to provide the ultimate performance upgrade for each individual bike and rider
- Performance Parts – the parts you need for your KTM, Husky, and Gas Gas TPI and Carb bikes
WHAT DO YOU RIDE?
NEW PRODUCT SHOWCASE
Track and Trail Tested Performance Upgrades!
Check out these videos to see how the TSP performance upgrades from SB Moto Performance hold up on the track and trails. See all of our videos here.
Kris Keefer and the guys at Racer X discuss and test the garage build of a 2021 KTM 300 XC TPI.
Dirt Bike Test rides RPM Racing KTM team rider Kaitlyn Jacobs’ 2022 KTM 150SX with motor mods tuned by TSP and SBMP.


Performance and reliability for all skill levels!
We are dedicated offroad riders. We understand the importance of not only going fast, but also keeping our motorcycles running in top condition. Nobody wants to spend a weekend at the trailhead wrenching on their equipment. Let us help you select the perfect parts to keep your two stroke running at peak performance!
2018 KTM 300cc XCW Carb and Head Review
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.
This could get expensive!!
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.
Second hand Bike???
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.
Major Improvement
Installed the low compression head and ecu flash. Tremendous improvement. The power is incredibly smooth on my 250. Before the flash and head, the power would surge a lot. Best improvement I’ve made to myRead more “Major Improvement”
That is the Best Customer Service
I just wanted to let you know I really appreciate your time helping me out with my TPI sensor. That is the best customer service I’ve had in a long time! Thanks again – you’re a goodRead more “That is the Best Customer Service”
2020 Husqvarna TE 300-i
I installed the ECU and new head and it made the power phenomenal compared toRead more “2020 Husqvarna TE 300-i”
Follow-up on Fine Tuning My Bike
I just wanted to follow-up on all of your latest recommendations for fine tuning my bike: Rekluse: Set Bevel Spring to #3 (stiffest setting) and set to Low Engagement Installed Idle screw and set to 600MV Bike runs even better and no more stalling issues. Thank you again for all of your time andRead more “Follow-up on Fine Tuning My Bike”


Three of these Huskies have your products installed! At the creek atRead more “”
2021 GasGas EX300 South Bay Moto Performance/TSP Power Kit First Ride
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.
Read more “2021 GasGas EX300 South Bay Moto Performance/TSP Power Kit First Ride”
Super pumped for the upcoming race season.
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.
Great Kit, Great Setup! Thanks Again!
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!