My 300 has mediocre low end!

[thumperflipper]

Taylor Park is my second favorite place to ride (second only to Moab). I am having the same problem with crappy lean feeling low end power on my 2011 300. All started after a topend rebuild. No amount of fiddling seems to help get back what I had. Maybe a difference in crown from the wiseco to the wossner piston? I am interested to hear your solution. Keep us posted

[GGRider01]

What frustrates me is that in February, on this same top-end and the N1ED on clip 1, the bike wanted to point skyward in 1st gear. This is with the supermoto gearing, I think 14/42. Temperature was 17 degrees. Have you ever been so cold that it made you want to throw up due to the pain of thawing flesh? Yikes. Winter riding is not for me. Plug looked on the dark side of what is ideal, but damn close.

I can tell you from what little I've retained from everyone here is that it is probably going to come down to having the head cut and maybe RB Designs mod to the carb. If it came to that, I'd just get the smartcarb - no point in buying 100 dollars in needles, 160 dollar carb mod, and on and on. But like I was saying, when the jetting and temperature were just right, the thing had power and jerked my arms off so I'm hoping like hell one of these needles will do the trick.

If you think your jetting is close I would consider advancing your timing. I'm holding off until the weekend to do mine. Will definitely report on results. Right now, the CCK is looking like a bandaid fix until the suzuki and yamaha needles show up. Seems rich down low and lean mid (due to clip position??) and nice when wide open. Just feels and sounds flat, but much quicker than before. Still has a nice punch, which I hope the N3xx needles give. No plug chops 'til the weekend.

[GGRider01]

N3EH, #2 clip.
38 pilot, 175 main

Hard to start (CCK had this issue too) so went up to a 40 pilot and it's a lot happier but the choke is unnecessary - seems like too drastic of a change for such a small adjustment. However, it seems common for these to start cold without the choke.

After a few runs, dropped main to 172, pulls harder and doesn't seem to sign off any earlier than before. Need to do wide open throttle chop.

The bottom end didn't change at all. Advanced the timing 1mm and it has come to life. Four-stroking is 90% gone at sustained low throttle openings, still need to clutch up the front end in second and above. 1st is too short to get sustained lift but it is quite willing with 14-51 gears. Will be dropping to a 13 for trail riding. I'll be happy with power wheelies in 2nd gear with the 14-51 setup and probably call it quits when it happens (it's close).

[95jersey]

Originally Posted by Getoviq95

try N3CJ 175/178-45/42 this is the best combination for me between 500-1500 meters.

Maybe try a richer slide? Comes to a point only so much you can do with jets and needles. Fix one thing...create another problem.

[Getoviq95]

Originally Posted by 95jersey

Maybe try a richer slide? Comes to a point only so much you can do with jets and needles. Fix one thing...create another problem.

Yeah N3CJ is leaner ,but i have 4 friends with gas gas 300 and they all ride with this needle and for many years they dont have a problems only in winter put N1EG

[GGRider01]

The n3ej is too lean for the as1, as per Jakobi and my own testing, the cj is half a clip leaner. It did work beautifully at extreme elevations, 10k+.

[Getoviq95]

N3C_ series which are 1/2 clip leaner than N3E_ but again otherwise identical. With them N3CJ #3 = N3EJ #2.5 .

[GGRider01]

Originally Posted by Getoviq95

N3C_ series which are 1/2 clip leaner than N3E_ but again otherwise identical. With them N3CJ #3 = N3EJ #2.5 .

Correct.

Also, I am rich off bottom - if anything I will be going to a #8 slide. In theory this should pull more fuel through the pilot but get closer to optimal ratio with even more air coming through. Who knows (not me). Could probably compensate by going to a 38 again.

[GGRider01]

Currently going nuts trying to lean this bike out. 35 pilot, N3EH #1 with a 170 main.

Smokes just the right amount, cleans up when warmed up. Takes out a chunk of earth off bottom, strongest hit in #1 position. Plug reads slightly dark after aggressively riding around the desert.

Would the needle being in #1 position really suggest dropping the main?? I'd hate to drop the main any more, although some people are using 168s and 165s.. Just scares me a bit. Going to N3CH sounds safer.

I really like these N3 needles, Seem to be pushing to a leaner diameter. N3CH, N3EW and N3CW (this is referred to as an N3CC as well???) are on the way.

I like how it runs now but don't like not being able to drop the needle anymore. At this point the smart carb would've been cheaper.

[cvl05]

I've run 165/168's in my 300's but only above 5000 feet, ncej #3, 38 p 165/68 main. stock slide. runs fine 5-9000 feet. tad rich up high but manageable.