Take one stock KLX300.
Pull out the secondary throttle valve.
Perform the MCM ( both cams, deactivate the KACR by simply pulling off its' spring)

Massive HP and TRQ increase from off idle to 8000 RPM, same-as-before power above 8000 rpm, ALL FOR FREE !
You'll be riding a whole new bike, performance wise, and will probably kiss goodbye any plans for further performance parts.

Just FYI.

 

Yeah new to this so not sure what you mean by MCM and KACR if you have time can you explain Thanks for your Time

 

Marcelino camshaft mod. ( MCM )
This is a mod to the timing of the camshafts.
It is the first sticky on the forum home page - https://www.kawasakiforums.com/forum...rcelino-35904/

 

So I've recently bought a 2022 klx 300 and I've done a few mods. I'm looking for advice on the next steps.
current mods.
-Stp removal
-lidless airbox
-stock exhaust with holes drilled in it for exhaust flow
-mcm intake and exhaust cam job
I dont have a tuner and im wondering if I would benefit from one or if there's something else that can help to bring this bike up to par with some of the more powerful bikes here.

 

Firstly, replace the airbox lid immediately. You can leave the snorkel in or out (of the lid), but put the lid back on the airbox.

Your next step is to replace your ECM. Use either the BDSB ecm or the "unlocked" ecm sold by @tsc
The link to the BDSB ecm is https://www.bestdualsportbikes.com/k...lx-ecu-mapping.
@tsc link is https://planetklx2.netlify.app/docs/...restricted-ecu

When your ECM is replaced, you will enjoy a huge leap in performance.
Do not run the airbox lidless unless/until a piggyback tuner is installed and dyno tuned to properly fuel ONLY open loop operations ( never disconnect the O2 sensor for ANY reason) ..

 

If you want to go straight to 30-32 hp, replace the ECM, install the Barker Exhaust system, install a fuel tuner, pull off the airbox lid, drive slowly to a dyno shop for tuning 75% thru 100% throttle position ( open loop ops only) to an AFR that stays between 12.5 & 12.8 to one.

Barker System : https://barkersexhaust.com/collectio...exhaust-system

 

so with the lid off the intake I'll be running too lean with the way the bike is now? Appreciate the input. It's hard to choose between the ecms.

 

Yes waaaaaay too lean.
I am hoping that @Olsen29 will create new , well vetted, data regarding the operation of the stock ECM - and at this point he is thinking that open loop ops begin at a TPS value of 75%.
In Joe-Sixpack terms, the indications/findings to date is that fueling is automatically "taken care of", regardless of mods, until you open the throttle past 3/4.
This is probably why you haven't damaged, or (hopefully) not accelerated much wear on your engine.

About the ECM's - Assuming both are in stock and available to purchase, the choice is between a OEM Kawasaki ECM ( A Japanese version that is unrestricted.) and the BDSB ECM that has been programmed by Pinit Racing.

Neither will allow the top performance mod combo ( lidless airbox and full exhaust system) without a piggyback tuner that has been tuned to provide proper fueling.
The BDSB was touted as having a revamped ignition scheme. Maybe they read my ignition tuning thread but they say they are employing what I called a "Big front end" in the low to mid RPM range.
Properly designing a "Big Front End" on the ignition scheme was the single biggest performance boost I could find, during my ignition tuning project, on the KLX.

So, I would choose the BDSB ECM.

 

Bdsb ecu is not verified independently on the dyno.
I've sold JDM ECU to the guy who already had bdsb. He compared two and sold bdsb.

 

It is always a problem of having to make decisions based on the data available. I am not aware of any data for the JDM ECU.
All I know of is your data on the unrestricted Japanese ECU and the BDSB ECU.

If you have data for the JDM, and it is actually available to purchase, please share.