2021 KTM 300 XC TPI Off-Road Motocross Project Bike | Garage Build

I had the pleasure to meet longtime Oldtimers MX member Jimmy Harris, who told me how much he loved the KTM 300 XC TPI machine but wished he could get it to be more moto-oriented. He found a two-stroke hop-up shop called South Bay Moto Performance, which is the exclusive North American dealer for Two Stroke Performance out of Australia. South Bay Moto Performance sells a TSP Power Kit that comes with a cylinder head, ECU, spark plug, and idle screw for closed-course racing that’s said to help the 300 XC TPI pull much further than the stock setup. In order to handle fast, choppy terrain, along with the occasional motocross track, Jimmy would enlist Kreft Moto to get the suspension comfortable for a wide variety of terrain. Being that I like to ride motocross as well as some West Coast GPs, I tried this setup at Glen Helen to see how much different it felt over a stock 300 XC TPI.
Text: Kris Keefer
Build: Oregon Oldtimers/Las Vegas Chapter
Video: Spencer Owens/Simon Cudby
Parts List:
Power Motorsports
2021 KTM 300 XC TPI
powermotorsports.com
Two Stroke Performance
Power Kit (Cylinder Head, ECU, Spark Plug, Idle Screw)
sbmotoperformance.com
KTM
Factory Triple Clamp
ktm.com
FMF
Gnarly Raw Pipe, 2.1 Titanium Silencer
fmfracing.com
Guts Racing
Ribbed Cover
gutsracing.com
Kreft Moto
Fork/Shock So Cal GP Setting/Valving Set Up
kreftmoto.com
Dubya USA
Kite Hubs, Excel Takasgo Rims
dubyausa.com
Dunlop
MX3S Front (80/100-21)
MX33 Rear (120/80-18)
dunlopmotorcycletires.com
Rekluse
Torque Drive System
rekluse.com
Twisted Development
Dyno Check
td-racing.com
Supersprox
Sprockets 13/49 Gearing (GP)
supersproxusa.com
JJW Designs
Oregon Oldtimers Graphic Kit
jjwdesigns.com
ABOUT DECAL WORKS
Founded in 1989 by Ron and Janeen Joynt, DeCal Works has been the industry leader in pre-printed decals and custom graphics for 30 years. With a passion for racing and innovation, DeCal Works has, since its early days, focused its attention on high-quality products with great customer service.
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[@phild9813]

Keefer, I suppose, is technically a vet, but from what I know he doesn’t ride like one. Bike is sick. Wish they weren’t unobtainiom.

[@TwistedTriggerEnduro]

Great video. Always good to hear your thoughts and see the bike rip. 💪🔥

[@dnrg62]

Nice ,doing a similar build with a 2020 250 xc tpi , been using 2 stroke performance for a lot of years ,they know their stuff.( no affiliation with 2 stroke performance ) 👍

[@jake105and]

Red 🤙🏼 You da Man!

[@devodar2579]

I would love to ride with Red! Good dude for sure. Wonder if he’s ever in Az riding?

[@siaknijustin]

Really bummed that Twisted Development doesn’t have their own TPI power solutions. They sure can tune the carbureted bikes to haul the mail!

[@trueinfidel7321]

Do you have the average cost for that type of Kreft set-up?

[@FirstGendodgegarage]

Are you allowed to run 32:1 in California

[@sitnlow4life]

Have this exact setup on my 250 tpi , it's 💯 Except that gigantic heavy ass Silencer 💩

[@Themusicbiz]

When you say adjust the power valve all the way out, does out signify tame or more aggressive? I imagine more aggressive, but in my experience I liked the 250 TPI all the way tame.

[@t_medaglia]

Ya even though Keefer was riding it like the PV was a fork spring, he’s referring to out being more aggressive

[@Themusicbiz]

@@t_medaglia thanks for the reply

[@nickflanigan3197]

These bikes come stock with a medium (yellow) PV spring installed as well. If you want more of an mx feel, go for the red PV spring and turn the PV out to around flush. If you want more, then upgrade your reeds, put on a shorty silencer, pipe, head, ECU, etc. If you're looking to save money, just buy the red spring and turn out your PV some. Bike is super tame stock, but can absolutely RIP on a track with the right mods.

[@austinleach6968]

Horrible set up. Everything including the graphics. Looks like they did some google research, slapped some things together and boom.