Good to hear you got it worked out.
There's a number of KLX owners who have installed the adjustable Kawi OEM Needle N1TC instead of dynojet's with good success.

Well, so many have botched a CVk tuning session over the years, it's kinda obvious when it happens but it still requires tact when pointing it out...lol

I / We still have no idea what the flow characteristics of your Chinese 162 jet is - so I can only guide you based on what you should be feeling and noticing now - if your jet does flow similar to a K162:

1. Fuel mileage - You should see same or better MPG than before. Obviously this is only when riding correctly for best fuel mileage.. If your fuel mileage has taken a significant dip downward - after careful monitoring over multiple runs - then there is a problem...

2. It is expected that from 5.5k - 6k rpm to 10,500 rpm, your bike will make significantly more power - as your previous #132 main jet ( assuming it flows like a K132 or even a DJ132) cannot fuel that RPM range correctly. If this is not happening for you, there is a problem..

3. Low speed throttle response and power levels ( below 4.5K rpm) should not have changed significantly - either better or worse - than before.. If this range has changed for the worse, there is a problem..


Once you've had plenty to time to learn your "new bike", you should be able to make accurate assessments .. You do not want to make knee-jerk assessments based on each ride you take - you'll have us chasing our tails / off on wild goose chases !!

Ahh,. IDRIDR, he has removed his N1TC.. The N1TC should really only be used when running a snorkel or lid without snorkel..

Ok, Kwak, I'm done rewriting post #22,,

Installing a DJ needle will richen your midrange from what you are running now (the stock needle) ..

In a few weeks, we will know if that is what your bike needs..

More information for you Kwak:

You stock header: The stock header runs out of flow / capability on a lidless 250 by 9000 rpm. On a 351, it would be expected to stop making power sooner - perhaps 8000 rpm.. If this is true, your power levels up to 8000 rpm should be greatly enhanced, but above 8k, only mildly enhanced.. I am guessing at the 8000 rpm figure, I don't really know for sure at what point the stock header starts to impede power production on a 351...

It is almost a given that you are going to have to fix your drilled slide lift port. All a drilled port does is make the midrange richer. While this ancient mod does work with certain airbox and CVK setups, it does not work with lidless setups..

The smooth(er) power delivery you are feeling, is a hallmark of getting a CVK set up correctly, and is expected. As long as the smooth power is also enhanced power, all is well.. Otherwise, there could be a problem..

Thanks for the information.
Will continue testing.
There is a little problem, I have no idea what rpm the bike makes, it is 2001 Japanese domestic market KLX with the first edition electronic dashboard without rpm indicator...

Well that is most unfortunate.. Without RPM, everything becomes very hard to assess and/or determine outcomes.. We will be shooting in the dark with future tweaks to your setup.. Your MPG will be about the only "tell" we can count on to be accurate..

Snappster, what's your results with Stock Spring + 1N + DJ144.. ?

If your results are "as expected", and you want to further "retune", your next move is to a DJ148 or DJ150.

Hey guys, how bout an update on the CVK setup performance ,,?