KLX 300 Sprockets | Front and Rear Sprocket Install | Common Dual Sport Gearing |

[@CrustyMac300]

Good content. I keep checking in and have upgraded my suspension springs due to your video on that, glad I did (all RaceTech with Eibach rear spring) Gold Valves planned for winter 2025. I'm on the 2023 KLX300, just hit 4000 miles, have done all of the main mods such as EJK fuel injection tuner, KDX air box snorkel, DNA air filter, removed the secondary butterfly, Delkevic slip on, deleted ALL of the smog stuff & PAIR valve delete, installed the 2.7 gallon eBay fuel tank, replaced all of the levers (clutch front & rear brake pedal) and have tried three options of sprocket combos before settling on my forth... 14/40 to 13/40 to 13/42 and now running my all round favorite 13/45! Most of my on-road riding doesn't require me to exceed 60 Mph so I opted for this combo because I want off-road performance. I did have to buy a new longer chain. Some of these mods are on my channel (I'm not as good of a videographer as you.) Oh, and yes I have that same chain guide (also have the same brand chain tensioners too/cnc'd aluminum in green with KLX etched in), it has taken a beeatinng I prefer it over the stock guide.

[@DerekDualSport]

Oh man that is awesome! I’m gonna go watch some of your KLX vids. Thank you for letting me know about the chain guide as well, I was a little worried about it holding up. I bought one from TM design too, I’d like to test em both out. Did your OEM guide break as well?

[@CrustyMac300]

No I didn't break the OEM I just didn't like how got all loaded up with rocks and mud, plus it's heavy and clunky

[@DerekDualSport]

And the green looks pretty awesome too haha. I am glad to know it can take a beating though.

[@DManOnFire]

@crustymac300 how is the ebay tank? I just found it recently but have not found any videos of installs or reviews. Checked your profile but did not se a video there on the tank.

[@seethingsclearlyawaken3424]

Even though I am not at all new to dirtbikes/streetbikes, this video is done extremely well. It's perfect for a new rider. Great job!

[@DerekDualSport]

Thank you for checking it out!

[@tieoneon1614]

Hands down u have the best Info Content about the 300. 13/42 was definitely the best combo for my previous 2 KLX250's and I think 13/40 is best for the 300 after trying 13/42, and 13/45. I need to update you on my STP opinion also. I said Meh after taking it out initially. But I just got back from a great 100 mile UP MI ride, and offroad having the STP out is definitely noticable in a good way. In fact, if u feel like tinkering someday you should try that with the 13/40 cuz the bike is more powerful low rpm and pulls taller gears better. But being in second gear 13/42 on single track makes the KLX feel like my KDX did in third gear...unstoppable from stand still to 25mph. Heres a fun fact : I bought a AL 45 and SuperLite steel 42 rear sprocket thinking Id save weight off the crank, since Im big on that and the lighter MX chain does wonders for power on my small bore bikes. The OEM 40, Lite steel 42, and and AL 45 all weigh exactly the same LOL. LIghter material but bigger size equaled them all out. I collection of throwing stars now

[@DerekDualSport]

I really liked 13/40 as well! I gotta put some time in on 13/42 before I seal my opinion. I’m supposed to be meeting up with a KLX rider who took his STP out and I’m hoping to swap bikes for a couple miles. I have a feeling it may be the final tipping point. That’s funny about the sprocket weights. Never hurts to have a small collection of large throwing stars 😂

[@DManOnFire]

Awesome video Derek. Thanks for taking the time to show this process. Looking forward to your impressions of the new ratio. 👍🏼

[@DerekDualSport]

Hey thanks for watching, and commenting! I’m looking forward to testing out the new ratio too.

[@THE1BMANY]

Thanks this video was a great help. I just changed my sprocket on my 300sm. Kept the 37 rear but changed to the 13T front. I definitely needed an impact wrench. The breaker bar did not cut it lol.

[@DerekDualSport]

Glad it helped haha yeah that thing was stubborn for me too! What do you think of the 13t on the the SM model?

[@THE1BMANY]

@@DerekDualSport haven’t had a chance to test it had to go back to work. When I have a free day I’ll test it out and give you some feedback. I mainly did the change to help with the wheelies lol.

[@DerekDualSport]

@THE1BMANY haha I totally get that 😂

[@THE1BMANY]

@@DerekDualSport finally got to test it! It was what I expected, super twitchy and nice torque off the line but Gives about 1000 higher rpm’s than usual. Example: 4th gear 8k rpm instead of 7k going 50mph. Nothing crazy. Will try the wheelies this weekend 😅😅. Thanks again for the video!!

[@nich2owrstle]

This was an awesome video and super helpful. Thanks for putting this together!

[@KTT1985]

I just got my 2025 klx300 and I am still in the break in period. I can't go over 4k rpms and that really sucks at the moment but once I get to 150 miles I can go up to 6k rpms which will be a little better. I can't wait till I can actually ride it over those break ins on all the valve settings and seals an stuff lol. But I love the bike so far

[@DerekDualSport]

That’s awesome congrats on the 2025! Yeaaah those break ins can feel like they take forever haha

[@KentwoodWarrior]

Solid info as always

[@DerekDualSport]

Thank you my friend! 🙏

[@lamardurden8460]

I dropped 1 tooth on the front but didn't get the results I wanted for off road. I reinstalled the stock front and installed a 52 on the rear. I like this set up much better.

[@DerekDualSport]

I got a pretty similar set up, I got to agree it’s great for off road.

[@logancantrell1806]

awesome video very helpful and straight to the point!

[@DerekDualSport]

Thank you for watching!

[@MilkBone3327]

Just came across your channel. Great stuff man! Thanks for sharing! 👍🏼

[@DerekDualSport]

Awesome! Thank you, for watching and commenting!

[@josephthornton8560]

I am leaning to something similar- I still have a lot to learn so I will wait a while. Maybe when I replace the chain and sprockets from natural wear. I am thinking 14/45 as it has a similar ratio, but more chain, and more teeth means; those parts will all last longer without the additional wear / drag / pressure on the chain slider. It also means, I'd have to move the rear wheel forward a lot to fit it.

[@DerekDualSport]

Not a bad idea at all, enjoy it as it is and swap em when you’re ready!

[@wvadv]

great video! who had the sale on wheel weights? keep up the informative content, it's greatly appreciated.

[@DerekDualSport]

Thank you! I picked up a 12 pack of wheel weights from amazon for like 20 bucks. I couldn’t believe how much weight it took to balance after putting in the rim lock.

[@Mrkomakhidze]

Going from original 14/40 to 13/42 sprockets on KLX300 2024 does it effect chain length? Thanks

[@440Mini]

Awesome video bro, where you ride at, I'm over in south GA, I have a black camo 2023 klx 300

[@DerekDualSport]

I’m in NC those black camo ones look awesome! What’s the best trails out in GA maybe I’ll get out there one day.

[@cruspeed]

Uwharrie? We’ll see you on the trails!

[@DerekDualSport]

Absolutely! Keep an eye out for me.

[@gabrielkopp2036]

Thats funny you basically set it up with the stock wr250r gearing... just a good tip no matter what make bike always be aware of going down 1 tooth could wear into your swinging arm

[@DerekDualSport]

Interesting I didn’t know the WR250 had 13/42 gearing.

[@gabrielkopp2036]

@@DerekDualSport well 13/43 but one tooth on the rear is not a huge difference. But your absolutely correct all dual sports have crap stock gears for any off road use

[@Reviews-Tidbits]

Just found your channel. I was considering buying the KLX 300 over the Honda 300l . I weigh about 225lb. Would I need to get a different shock? I know I would have to upgrade everything on the Honda.

[@DerekDualSport]

I think these bikes are made for folks around 160-175lbs. You don’t need a new spring but it will help.

[@beekeeperbrad6251]

Should use impack sockets

[@earlbarger3071]

Hi, I just bought a new 2024 klx300. I want to do the 13/42 combo, but can not find anything but stock size. Where did you get your sprockets from?

[@DerekDualSport]

I bought mine from sunstar. It will show sprockets for a KLX 250 but it fits the 300. I’ll try to leave a link below. sunstar-mc.com/pages/product-result?rq=jh_off-road~mk_kawasaki~md_klx250~yr_2020

[@earlbarger3071]

@@DerekDualSport thank you for the fast response

[@Mjr1348]

Great vid.

[@DerekDualSport]

Thank you! 🙏

[@georgeleach4673]

Where did you get your 42 tooth? I can’t find it.

[@DerekDualSport]

I got mine directly off sunstars’ website if you search for 2020 KLX 250 sprockets those will all fit the KLX 300 as well.

[@georgeleach4673]

@@DerekDualSport I forgot to ask if you needed a longer chain with 13/42.

[@DerekDualSport]

Nope I used the stock chain with 13/42 setup

[@GIJO]

Hey you fancy giving me a hand on taking the 27mm nut loose?! I cant even get it with my impact, so I just put it back together, and every video I watch everyone already has it broke free.

[@DerekDualSport]

Have you tried PB blaster? That’s my go too, just spray around the nut and the thread let it sit for about 5 minutes and it should break free.

[@GIJO]

@@DerekDualSport yea i tried let it soak for 15 tried and somewhere in the process broke 2 spokes so put it back together again before I break something else lol

[@GIJO]

@@DerekDualSport Ride tomorrow?

[@DerekDualSport]

@GIJO I have plans today, I’m not sure the next time I’ll be out at Brown.

[@GIJO]

@@DerekDualSport I live in Mooresville any time you wanna ride hit me up