2018 GP Tuning

[markwoodlief]

So i started with an EC, that i specifically asked for since I'm almost 50 and not as fast as I used to be.
I ended up with a GP300, (long story). And after the factory fixes it's back in my garage and rideable.
My question is how to tame the beast? I've been on 4t bikes for awhile, although had a KTM 300 for many years as well.
The GP is a fire breathing dragon. Serious arm stretcher with a very very touchy throttle. On my trials bike i just got the white throttle tube and it tamed my 280 very much and is way more controllable, especially in tough sections.

Curious if anyone has tried that with the new GG Enduro bikes?

 

[thumperrider1]

In the past on my 300's I experimented with the suzuki needles and the G2 throttle cam system.

I'm actually looking to pick up an 18 XC300, so will post what I end up doing to it.

 

[Gottsell]

Adjust powervalve 1 1/2 -1/45 out and Suzuki needle necj. Works fine for me

 

[markwoodlief]

Adjust powervalve 1 1/2 -1/45 out and Suzuki needle necj. Works fine for me

is that on new 300?

 

[RS1]

Hi,

My 300 2018 work better with NEDW at 3, 42/172 and AS at 1.5.

T? 5 to 15?C , sea level.

 

[pigpen966]

My 300 GP runs great with the N3CJ #2, 42 pilot and 180 main in Ohio.Very linear power. I have my power valve set at the standard 2 turns.

 

[markwoodlief]

Was told by a very knowledgeable unnamed source that it's the High Compression Head that is making it so dramatically different than the EC. .. SO loving the power, but the throttle needs tamed a touch for my old body.

 

[memphis2857]

It’s the jetting that makes it so “pipey”. Throw that p.o.s. N1EF needle in the trash can and get a N3CH or N3CJ needle with a 42p and a 180 main. Still a nice hit but mega bottom end. The NEDW needle works OK to but is rather rich on bottom and causes the bike to load up.


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[gasser]

I have to second the suggestion of a Suzuki needle and the G2 #400 throttle, that will make it much more like a 4stroke. The throttle was a must for me when I had my 300 but I don't need it on my 250 (even though I have minor muscle control issues) so you might get by with just a needle change. I run a NEDW in my 250 and it is a huge difference from the N3-- I was running. It runs super clean right from idle and it will crawl around for hours and never load up. Yes it is a little rich on the bottom but that makes it strong without being snappy and like I said it never loads up. My 250 runs just a little flat in the midrange but that shouldn't be a problem on a 300. My bike revs out fine on top.

 

[markwoodlief]

Bud is the man.. i mentioned this to him yesterday and BAM!!

https://www.gasgaspartsguy.com/THROTTLE-detail.htm?productId=-8007778&shopBy=-35992&catalogId=-15678

Love that guy!!!!

 

[Gibnut]

Go 14/48 & jet it fat.

 

[memphis2857]

Go 14/48 & jet it fat.

14/48? Are you trying to do 120mph? You would be in 1st gear the whole time you rode if you’re anywhere east of the Mississippi River


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[thumperrider1]

I got the maiden voyage in on the XC 300 I bought yesterday. Coming off a YZ250X the motor had a little more bottom end and lugged very well. It did not hit hard to me, at least not compared to the YZX. The jetting is really not good stock IMHO. Blubbery on the bottom and then hits when you get on the pipe. Going to try an NECJ needle next week.

 

[memphis2857]

I got the maiden voyage in on the XC 300 I bought yesterday. Coming off a YZ250X the motor had a little more bottom end and lugged very well. It did not hit hard to me, at least not compared to the YZX. The jetting is really not good stock IMHO. Blubbery on the bottom and then hits when you get on the pipe. Going to try an NECJ needle next week.

I suggest N3CH or NEDJ.


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[Zman]

For a free fix you can retard the ignition timing a few degrees.

 

[thumperrider1]

I suggest N3CH or NEDJ.


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Thanks. I have those two needles coming as well to try out as well as the NECJ.

 

[barossi73]

The NEC is halfclip leaner than NED.
Other riders/members have often found NED #2 for pre 18 250/300,my 200 likes NEC #3 (NED 2.5)depending elev etc.But the 18 is a little unknown i guess..some internal changes? (if the stock needle is same as previous you should be sweet)Be sure and post results.Should be a very useful comparison and setup info(for when i manage to convince the other half i really need an 18!)

 

[thumperrider1]

The NEC is halfclip leaner than NED.
Other riders/members have often found NED #2 for pre 18 250/300,my 200 likes NEC #3 (NED 2.5)depending elev etc.But the 18 is a little unknown i guess..some internal changes? (if the stock needle is same as previous you should be sweet)Be sure and post results.Should be a very useful comparison and setup info(for when i manage to convince the other half i really need an 18!)

I am not a fan of the stock needle on the 18. I have the NECJ Suzuki needle, N3CH, and N3CJ to try out.

 

[Jacob 'Berg]

I am not a fan of the stock needle on the 18. I have the NECJ Suzuki needle, N3CH, and N3CJ to try out.

For the record, what is the stock needle for the 2018 bikes?

 

[RS1]

For the record, what is the stock needle for the 2018 bikes?

N1EF, Now my 300 2018 work perfect with NEDW at 3 172/42. tested between 5C and 15C at sea level.