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2017 KTM 300 XC power looking for more low to mid grunt.

By farmboybob,
in KTM 2 Stroke

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Lehiguy
Lehiguy

I am not a fan of the Gnarly.  The torque curve is too short.  Stock is better, PC is better still.  

Lehiguy
Lehiguy

For the the record, the PC Platinum II is the same gauge of steel as the FMF Gnarly.  It is possible to have too much low end.  I have been to that point, even with the PC pipe, and the bike got so ju

bitshifted
bitshifted

Not on the 250 for sure. Still, if someone wanted to make their 300 go like a clown on fire, looks like there's room for a more insane curve...   2017 CDI 250 SX 55439031000 ELECTRONIC CASE 250SX

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Kommander

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I want one so bad it aint even funny man...

https://www.youtube.com/watch?v=8bdIAyKgufY

I've got one on order. We used to run the dual lectron on old drag bikes. They were an all or nothing carb. But it didn't matter when wide open was the only throttle position that counts.

I ride with three guys that run them. They say if they had to pick one mod that would be it.

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91kdx25088

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Get an RK tek head. You'll have the same set up as I do and the motor is incredible. Make sure you have the red spring as well.

 

I'd also add that I switched bikes with a buddy with a 15.5 factory edition 450 to try out his air fork and my 300 mimics the 450 pretty damn well.

 

 

I recently came back to a 2 stroke after 15 years on 4 strokes. I'm a expert vet class desert racer. After sorting out the bikes jetting issue (I installed a Lectron carb) I love this bike. It's fast, lite, eats whoops up, and turns like a dream. I am looking to broaden the low to mid range power. I miss the 4stroke grunt in that range. I'm hoping to get some more power there by adjusting my power valve. I know this bike is pretty new out, but share what you've done to get more power. I really don't want to give up the awesome top end to get it. I'm also looking for info on this all new motor, not on older models.

changing power valves wont don't do much if anything. even the softest spring doesn't even come into play until something about 5000rpms

 

Simple basic fix to get more power on the bottom end is the FMF gnarly pipe.. There is a noticeable difference in the bottom end by changing the pipe. We ride tight gnarly single track with relentless hill climbs so our bikes are run majority of the time needing that low end power.

 

Yes, whatever you do make sure you buy a gnarly.

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farmboybob

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What about throwing on a lectron carb? No personal experience as of yet but a few of the single track racers I ride with run them and have nothing but good to say on regards to the bottom end response and grunt

 

I put on a Lectron carb on my 2017 ktm 300 xc.  It is great.  I'm loving it.  I'm doing some testing with the power valve settings this weekend.  Then I will check with Slavens to see if I want to try a different head.

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Grand Master

THUMPERRRR

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I am not a fan of the Gnarly.  The torque curve is too short.  Stock is better, PC is better still.  

seems like PC isnt really helping at the bottom,,, in fact less bottom than stock from what I read...

great mid range and up with some good over rev up top there...

 

myself

I want the bottom grunt and a heavier duty pipe...

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Kommander

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going to read up...

platinum 1 or 2?

If I remember correctly the platinum 2 is thicker material. Don't quote me on that. I ran a pc on my last 300xcw. I have no complaints. The power didn't seem as torquy in the bottom like my gnarley does but it was a little more aggressive from mid to top.

I e heard guys say the build quality is a little better on the pc and their cunstomer service is better than Fmf. But I have no personal experience with this.

There are many decent pipes out there. Some of it comes down to personal preference but tough to make an opinion without feeling one.

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KennyMc

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seems like PC isnt really helping at the bottom,,, in fact less bottom than stock from what I read...

great mid range and up with some good over rev up top there...

 

myself

I want the bottom grunt and a heavier duty pipe...

If your just looking for low end grunt, and heavy duty, your are describing the FMF Gnarly.

 

http://dirtbikemagazine.com/home-features/ktm-300-exhaust-systems

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Kommander

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If your just looking for low end grunt, and heavy duty, your are describing the FMF Gnarly.

http://dirtbikemagazine.com/home-features/ktm-300-exhaust-systems

From my experience I would have to second that. Another thing to mention with my old pc pipe if

You short shifted it would easily fall off the pipe of your weren't in the higher rpm range.

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Lehiguy

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For the the record, the PC Platinum II is the same gauge of steel as the FMF Gnarly.  It is possible to have too much low end.  I have been to that point, even with the PC pipe, and the bike got so jumpy it was pulling up the front wheel in the corners and was hard to control on technical stuff. This was due primarily to the SXS ignition module, lots of compression, and a shorty silencer (these add low end) and spot on jetting.  I have dialed it back now to the point that is has all the low end I can use in the technical stuff, but still has the vicious mid range and top end for sand and the fast sections.

Edited by Lehiguy
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THUMPERRRR

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Posted (edited)

For the the record, the PC Platinum II is the same gauge of steel as the FMF Gnarly.  It is possible to have too much low end.  I have been to that point, even with the PC pipe, and the bike got so jumpy it was pulling up the front wheel in the corners and was hard to control on technical stuff. This was due primarily to the SXS ignition module, lots of compression, and a shorty silencer (these add low end) and spot on jetting.  I have dialed it back now to the point that is has all the low end I can use in the technical stuff, but still has the vicious mid range and top end for sand and the fast sections.

Edited by THUMPERRRR
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Grand Master

THUMPERRRR

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Posted

For the the record, the PC Platinum II is the same gauge of steel as the FMF Gnarly.  It is possible to have too much low end.  I have been to that point, even with the PC pipe, and the bike got so jumpy it was pulling up the front wheel in the corners and was hard to control on technical stuff. This was due primarily to the SXS ignition module, lots of compression, and a shorty silencer (these add low end) and spot on jetting.  I have dialed it back now to the point that is has all the low end I can use in the technical stuff, but still has the vicious mid range and top end for sand and the fast sections.

thks...

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Kommander

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For the the record, the PC Platinum II is the same gauge of steel as the FMF Gnarly. It is possible to have too much low end. I have been to that point, even with the PC pipe, and the bike got so jumpy it was pulling up the front wheel in the corners and was hard to control on technical stuff. This was due primarily to the SXS ignition module, lots of compression, and a shorty silencer (these add low end) and spot on jetting. I have dialed it back now to the point that is has all the low end I can use in the technical stuff, but still has the vicious mid range and top end for sand and the fast sections.

Just to clarify. I was comparing the thickness of the platinum 1 vs the platinum 2.

And as for "too much" bottom end, wouldn't that come down to clutch control?

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Lehiguy

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Just to clarify. I was comparing the thickness of the platinum 1 vs the platinum 2.

And as for "too much" bottom end, wouldn't that come down to clutch control?

Yes and no.  I used to ride CR500s, so I know all about clutch control.  What I realized is that I had defeated one of the bikes most amazing qualities, that of being able to tractor up anything and never lose traction because of the engine's unique characteristics.  Once I had it dialed all the way up to Fire Breather status, that was gone, and I had a more difficult time (no matter what I did with the clutch) finding the traction to move ahead.  Perhaps I should admit that I was going places where most sane people wouldn't, but I did it because the bike was able to do it.

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