Project Two-Stroke: 2021 KTM 300SX Build

We had the chance to test ride a 2021 #KTM300SX #twostroke built by Twisted Development Racing. Jamie worked his magic on what started out as a stock KTM 250SX and turned it into a fire-breathing two-stroke. We took to Glen Helen Raceway to put this project bike to the test and it did not disappoint. Click play to watch Ping crack the throttle and give a rundown on his first thoughts. Check it out!
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[@Coopdegras]

Love these 2 stroke builds, this sounds so crisp and broad just my cup of tea 👌🏼

[@capmototv3421]

Your building my dream bike. Thanks for sharing.

[@spacejaime]

Super Hunky once said (yes I'm old) and I paraphrase - "no one has ever won a race on a dyno".

[@BobBob-vq3rb]

Gonna have a good summer

[@alexarmstrong1134]

I’m here for 2nd test👍

[@duffyrides]

Jamie definitely knows his stuff! This makes me want to build up one of these bikes. Great video, thanks Ping.

[@spacejaime]

Ping, 15 -16 years ago, 250cc KTM;s dynoed at 47-49hp - depending on the year and which dyno was used. I've never seen one pull just 42. If their shop dyno shows 42hp, the 55hp reading is probably close to 60hp. Again, no mention if it matches a 450 four stroke on the track, which "on paper" it should easily do. Great video, as always!!!

[@mikebrown41182]

Top peak horsepower at certain rpm for the stock 250?

[@spacejaime]

@@mikebrown41182 - obviously peak hp. Like all 250's 2T, power would drop off quickly after peak power.

[@kellybrown6988]

It says on the webpage it makes 41.1 rear wheel hp.

[@Jellyflesh]

My 2015 250 sx had 50 hp on the crank, according to KTM

[@richardsmith3350]

If KTM made a 300SX with e-start they would sell a lot.

[@fourtynine17]

2023

[@BobBob-vq3rb]

The handle bar kushining...vital

[@bptryp]

How about starting with a 300XC for the longer gears, then do the TD mods? They have the same frame

[@Equinsu_Ocha]

I want to see some 22 MC250 2smoke action

[@johnmicallef684]

Can you give an explanation on why you are running the MX dome now?

[@coryfachar3215]

Nice bike setup! Definitely right on the top end power! Very impressed!

[@Kyle-pl6rl]

Would be an awesome dunes bike

[@BobBob-vq3rb]

I live outin the contry this will be perfict

[@jpaul5387]

Who's watching this while waiting for the reveal of the new 2023 KTM 300sx reveal? 😂

[@poullinneberg7041]

Is the yz test comming

[@pierr057]

#mxtest ça copie !!

[@dustin9035]

What is the vibration like?

[@cr-fc5rb]

it has a counterbalancer so very little vibration

[@poullinneberg7041]

How come the yz300 doesn’t come up is it because ping thought the us was better and vital didn’t want that and made a new test with just the sx 😡

[@night1ish]

5:52 🥵🥵🥵🥵🥵

[@BobBob-vq3rb]

Or Kowalski

[@Shaw413]

Someone got carried away with the paint pen on the bolts....

[@ericdunphy114]

Looks kinda cool honestly lol

[@StrykerV8]

First

[@JohnHowerton137]

Can’t imagine how fast these things are, especially when there’s perfect traction. Keep some fresh undies around 😋

[@mitchellgodkin6102]

I believe the 55HP, very impressive... but the 250sx does not come stock with 42HP. 49 and change no ?

[@morley3810]

Yeah, that's what I thought too

[@StrykerV8]

Yes, 49. 55 is great for a 300. 500s "only" made about 60. Modern 450s make about 63 these days

[@cr-fc5rb]

@@StrykerV8 fake-newsv8 you mean crf450 makes 50hp at the wheel kzbin.info/www/bejne/raLKgHWLpKtritE

[@sitnlow4life]

55hp ? Lol my 250 tpi makes that with the tsp kit

[@Godxillaaa]

First👌

[@StrykerV8]

Nope, I was

[@Godxillaaa]

@@StrykerV8 how?

[@Godxillaaa]

@@StrykerV8 you said first 2 mins ago I said it 15 mins ago

[@StrykerV8]

@@Godxillaaa wrong, check again

[@Godxillaaa]

@@StrykerV8 still first

[@mixerguru]

Jesus God damn Fucking Christ

[@vwsandvettes3253]

Satan Beelzebub demon!