2 stroke mods

Cliffy615
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Cliffy615
After the usual simple bolt on mods, pipe and v force, what would be the next best upgrade got get some more bottom to mid? The top end has plenty, I’ve just ridden a few bikes which get to that power quicker/ easier. Thanks in advance
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Acidreamer
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Acidreamer 12/18/2017 5:14pm
12/18/2017 5:14pm
porting, sprocket change, jetting, modifying the squish, fly wheel weight seems to be great for most people.
colintrax
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colintrax 12/18/2017 5:15pm
12/18/2017 5:15pm
Head work, port work, stroker crank. You're gonna have to spend money if you want real power gains.

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Bruneval
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Bruneval 12/18/2017 8:44pm
12/18/2017 8:44pm
Bottom to mid is a bit of a non-entity on a 150. As they say, there is no replacement for displacement.

Porting gains for mid-top and race fuel is where I am looking to go on my 150sx.
CarlinoJoeVideo
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CarlinoJoeVideo 12/18/2017 8:55pm
12/18/2017 8:55pm
Cliffy615 wrote:
Ktm 150
Have you messed around with the power valve spring tension? That can dramatically change where and when the power hits.
KTM Two Stroke 12/18/2017 10:41pm
12/18/2017 10:41pm
Cliffy615 wrote:
Ktm 150
I Talk with a German Engine Tuner 3 Weeks ago,and he told me
on the 2011-2015 125/150 Engine you can make
13-16% more Power.

But the 2016+ Models are so good in Stock Form that he can make max. 5% more power with the Full Tuning Program.

So i leave the Bike as it is (SXS Pipe and Vforce 4)
and spend the Money in Suspension Tuning
ktm-5
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ktm-5 12/19/2017 4:00pm
12/19/2017 4:00pm
Get a quad flow torque wing, had one on our 125 and my son loved it and talk to jbone motorworks he can re-do the head
Falcon
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Falcon 12/21/2017 10:36am
12/21/2017 10:36am
Mill the head for more compression and run race gas. You'll notice a bump in throttle response and a little ooomph down low, at the cost of some overrev.
Sidecar
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Sidecar 12/22/2017 12:54am
12/22/2017 12:54am
What Falcon said... Or get a 500...
Falcon
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Falcon 12/22/2017 9:17am
12/22/2017 9:17am
Oh, and since I grew up in the MXA days, I can't believe I forgot this mod: go up one size on the rear sprocket! Cool
Moto520
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Moto520 12/22/2017 9:52am
12/22/2017 9:52am
Porting. Keep in mind that when you take from one side to give to the other.....you lose a bit. Up one or two teeth on the sprocket.

Has anyone really ever felt all that much of a gain from an exhaust? I always wind up replacing mine but it's always pretty blah in terms of gains.

Race gas.....biggest gain for the money
flyingeek423 12/22/2017 10:01am
12/22/2017 10:01am
Agree with Moto520. A small sprocket change could make the difference you're looking for while while offering a cheap(ish) solution.
Cliffy615
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Cliffy615 12/22/2017 10:25am
12/22/2017 10:25am
Thanks for the answers, will trying porting, sprocket 1 tooth higher at the back and look to see if I can get a boyesen power wing or similar, can I run race gas on a fairly standard engine? If so which is best? Thanks again
Falcon
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Falcon 12/22/2017 10:49am
12/22/2017 10:49am
Race gas might help a little, but really your engine will only use however much octane it needs and spit out the rest. It's quite expensive to run that kind of fuel if you don't need it for octane. Oxygenated fuels can certainly help, however.

Yes, you can run race gas in any engine.
brocsdad
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brocsdad 12/24/2017 2:29pm
12/24/2017 2:29pm
Moto520 wrote:
Porting. Keep in mind that when you take from one side to give to the other.....you lose a bit. Up one or two teeth on the...
Porting. Keep in mind that when you take from one side to give to the other.....you lose a bit. Up one or two teeth on the sprocket.

Has anyone really ever felt all that much of a gain from an exhaust? I always wind up replacing mine but it's always pretty blah in terms of gains.

Race gas.....biggest gain for the money
If the porting and head mods are done correctly you will gain power everywhere. Contact Terry Varner for your mods.

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