Ktm 300 power valve

New Bikes, Old Bikes, Bike Setup, Bike Mods, Questions, Riding Technique, Advice.
Post Reply
thebourbonpeasant
User
User
Posts: 11
Joined: Thu Jul 10, 2014 4:18 pm

Ktm 300 power valve

Post by thebourbonpeasant »

Just wondering what guys here are running in their 300s in terms of power valve springs and settings? I just picked up an '11 300XC, and it has the yellow spring a few turns in.

User avatar
AJRJ
2024 RMDRA Member
2024 RMDRA Member
Posts: 1187
Joined: Sat Jun 26, 2010 1:45 pm

Re: Ktm 300 power valve

Post by AJRJ »

Red spring flush was my setting.

User avatar
Dobi
2024 RMDRA Member
2024 RMDRA Member
Posts: 3770
Joined: Thu Mar 03, 2005 9:33 pm
Location: deep in the woods on some epic singletrack
Contact:

Re: Ktm 300 power valve

Post by Dobi »

I run the red spring and run it in a few cranks unless its muddy. The unit does have a lot of adjustment and makes a difference if you play with it.

thebourbonpeasant
User
User
Posts: 11
Joined: Thu Jul 10, 2014 4:18 pm

Re: Ktm 300 power valve

Post by thebourbonpeasant »

So you guys don't find the red spring comes on too strong for our area? I'm hoping to get my powervalve set up so its a lot smoother throughout the entire rpm range. I'm currently running the yellow spring, and just started playing with the preload, but am finding it to be too "peaky". Its a new to me bike, but I'd like to get the power more linear like my old 4stroke. Maybe the 4t just spoiled me?

Braap791
2024 RMDRA Member
2024 RMDRA Member
Posts: 757
Joined: Tue Jun 01, 2010 2:39 pm
Location: Calgary

Re: Ktm 300 power valve

Post by Braap791 »

Have you tried the green spring yet? it should make it even less snappy than the yellow spring

User avatar
AJRJ
2024 RMDRA Member
2024 RMDRA Member
Posts: 1187
Joined: Sat Jun 26, 2010 1:45 pm

Re: Ktm 300 power valve

Post by AJRJ »

IMO I liked the Red spring for two reasons;
- I wanted as much power as possible, as early as possible.
- The other springs all make the same horsepower, but just delay it so you end up with a 2-stroke "hit" when it opens.
Coming off a 4 stroke, I never found the power to be "too much" or "uncontrollable", but YMMV. Some guys set their bikes up to delay the powerband hit, and then never rev them high enough to get there. Riding style comes into play, and I sure learned that KTM 2-strokes can be made into VERY different machines, depending how you set them up.

All that aside, the best thing I ever did was put on a high compression head. Made the bike so much better off the bottom, and complemented the red spring perfectly.

Giles
Writer
Writer
Posts: 175
Joined: Sat Jul 07, 2007 9:06 pm

Re: Ktm 300 power valve

Post by Giles »

hey AJRJ, how much was the high compression head and where did you order it from?

User avatar
AJRJ
2024 RMDRA Member
2024 RMDRA Member
Posts: 1187
Joined: Sat Jun 26, 2010 1:45 pm

Re: Ktm 300 power valve

Post by AJRJ »

I bought the KTM powerparts head, you can find it CycleWorks. It was around $300 I think.

Worth every penny at our elevation.

thebourbonpeasant
User
User
Posts: 11
Joined: Thu Jul 10, 2014 4:18 pm

Re: Ktm 300 power valve

Post by thebourbonpeasant »

Thanks, I'm actually looking for more torque down low, as the 4t I'm coming off was a 525, so I've adjusted my riding to big torque right from idle. I might have to try the red spring out. Who knows, I might end up trying that other head out too.

User avatar
dirtyboy
2024 RMDRA Member
2024 RMDRA Member
Posts: 6971
Joined: Sat Dec 11, 2004 5:04 pm
Location: Calgary, AB
Contact:

Re: Ktm 300 power valve

Post by dirtyboy »

KTM 300 Colored Power Valve Spring Comparison- None Red Yellow Green with PV Screw Near Midpoint
Image

Here's a picture for you. :D

gdg530
Writer
Writer
Posts: 170
Joined: Sun Jul 05, 2009 2:37 pm
Location: calgary

Re: Ktm 300 power valve

Post by gdg530 »

I like to run the red spring in more open areas like Moab but in tight stuff I like the yellow stock spring better traction for me.

Post Reply