New 2025 ktm 300sx

Hey guys, just bought my first dirtbike about two weeks ago and we’ve been out riding five or six times with the wifey and my 2 boys. It’s been a great time.

I’m going to start taking the bike to some tracks and I need to get suspension dialed in for weight I am 6 foot two and 235 pounds

I already ordered a new spring for the rear shock
 I need some help on setting up the front forks. One of my buddies told me to run them at 165-167 psi
 is there any adjustments I can make?

Sorry if this is already been answered I’ve googled and searched and I can’t find a good answer.

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joelsmith
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5/15/2023
Location
Marysville, OH US
5/23/2025 4:03am

Motocross action has really good setup guides for the WP forks. Start with the “travel rings” on the forks all of the way up. Run it at your PSI and see where the rings are. Somewhere around 1 1/2 inches from the lower leg will get you close to your “spring rate” and if not, adjust accordingly. Adjust for feel with the clickers. You’re pretty much a clone of me, size wise, and this method has worked well for me

2
5/23/2025 4:46pm

Thanks man, I appreciate it I’ll give it a shot.

TDC
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HTown, TX US
5/26/2025 1:17pm

Now that's an amazing first bike. Keep it in the white map, green map light could be hazardous to your health. It's a good idea to learn about maintaining dirt bikes properly. Super easy for the simplest things to cause costly damage.  

Be aware that KTM has no parts availability these days. I had to get a used power valve motor and new cylinder/piston kit off of ebay. 300's have a seizing issue with poor cooling around the exhaust port power valve. There's a fix, but I was waiting to do it with the first piston replacement(top end job). D'oh! waited too long and ended up spending over a grand!   

1
bdoza10
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Location
Rialto, CA US
5/27/2025 6:23pm
TDC wrote:
Now that's an amazing first bike. Keep it in the white map, green map light could be hazardous to your health. It's a good idea to...

Now that's an amazing first bike. Keep it in the white map, green map light could be hazardous to your health. It's a good idea to learn about maintaining dirt bikes properly. Super easy for the simplest things to cause costly damage.  

Be aware that KTM has no parts availability these days. I had to get a used power valve motor and new cylinder/piston kit off of ebay. 300's have a seizing issue with poor cooling around the exhaust port power valve. There's a fix, but I was waiting to do it with the first piston replacement(top end job). D'oh! waited too long and ended up spending over a grand!   

Do you have any links to this issue and fix? I’m at 40 hours and looking to do a top end soon 

The Shop

TDC
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388
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Location
HTown, TX US
5/29/2025 10:17pm
TDC wrote:
Now that's an amazing first bike. Keep it in the white map, green map light could be hazardous to your health. It's a good idea to...

Now that's an amazing first bike. Keep it in the white map, green map light could be hazardous to your health. It's a good idea to learn about maintaining dirt bikes properly. Super easy for the simplest things to cause costly damage.  

Be aware that KTM has no parts availability these days. I had to get a used power valve motor and new cylinder/piston kit off of ebay. 300's have a seizing issue with poor cooling around the exhaust port power valve. There's a fix, but I was waiting to do it with the first piston replacement(top end job). D'oh! waited too long and ended up spending over a grand!   

bdoza10 wrote:

Do you have any links to this issue and fix? I’m at 40 hours and looking to do a top end soon 

The fix is to use a 1/4" drill bit to slightly enlarge a coolant passage/hole at the top of the cylinder towards the exhaust, on the shifter side. You would do this with the cylinder removed, as to clean out any debris of course.

After this first top end job and coolant flow fix, I wouldn't worry about changing the top end more often than 80 to 100 hrs. Trail riders go 100-150 and say all looks good. Now if you were at the pro racer level or ripping a 125, 40hrs makes sense. 

MotoRoss678
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Waynesburg, PA US
5/30/2025 6:09am Edited Date/Time 5/30/2025 6:10am

I have a 2024 I race GNCC on as well as moto as often as I can talk the rest of my vet crew into it.  I found this when researching basically how to properly do a topend:  https://youtu.be/T2eQhKeL35o?si=WVvnr9CWvWJIcTnH  He talks about the cooling issue and the modification at some point.

5/30/2025 9:59am

Hey guys, thanks for the input. I appreciate it already managed to hurt myself, but I’m already riding again.

Does anybody have suggestions for some lower foot pegs and if so, how much lower should I go with the fact that I’m 6 foot two?

MotoRoss678
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Joined
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Location
Waynesburg, PA US
5/30/2025 12:10pm
Hey guys, thanks for the input. I appreciate it already managed to hurt myself, but I’m already riding again.Does anybody have suggestions for some lower foot...

Hey guys, thanks for the input. I appreciate it already managed to hurt myself, but I’m already riding again.

Does anybody have suggestions for some lower foot pegs and if so, how much lower should I go with the fact that I’m 6 foot two?

Pretty sure I will have ordered these by the end of the weekend.  I am about 5'10" and find the rider triangle a little cramped but I came from Yamahas and still ride a 125 fairly often.  That said, in some respects I don't want to lower the pegs because it forces me into a more aggressive rider position.  One the other hand I need sharper pegs than the stock oddities that came OEM so this seems like a logical solution for less than $150.  The last set of Ti bearclaw pegs I had were $300.

 

https://www.motoes.net/product-page/foot-pegs-stainless-tbi-ktm-husky-gasgas-2023-24-offset

2
wrc777
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Location
Greenwood, IN US
Fantasy
5/30/2025 1:51pm
Hey guys, thanks for the input. I appreciate it already managed to hurt myself, but I’m already riding again.Does anybody have suggestions for some lower foot...

Hey guys, thanks for the input. I appreciate it already managed to hurt myself, but I’m already riding again.

Does anybody have suggestions for some lower foot pegs and if so, how much lower should I go with the fact that I’m 6 foot two?

Pretty sure I will have ordered these by the end of the weekend.  I am about 5'10" and find the rider triangle a little cramped but...

Pretty sure I will have ordered these by the end of the weekend.  I am about 5'10" and find the rider triangle a little cramped but I came from Yamahas and still ride a 125 fairly often.  That said, in some respects I don't want to lower the pegs because it forces me into a more aggressive rider position.  One the other hand I need sharper pegs than the stock oddities that came OEM so this seems like a logical solution for less than $150.  The last set of Ti bearclaw pegs I had were $300.

 

https://www.motoes.net/product-page/foot-pegs-stainless-tbi-ktm-husky-gasgas-2023-24-offset

I think those are carapaks. They have 5mm and 10mm down without moving the pegs back too on eBay. 

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