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A lot of people say Honda did this for emissions but the CB300 is also honda's and it has the better air intake and cams, could it be that the intake snorkle is long to avoid water getting into the engine easily? By being so long it dumps water at the bottom of the intake box and avoid it getting sucked through the filter

Awesome hack - just bent mine recently!

why would honda make the box restrictive? I don't understand why they chose that. is there a benefit?

Thanks a million mate, just done the same thing and managed to adjust the shock preload on my Suzuki vstrom Yss shock.

Just found the same problem. ridiculous that the tool to adjust preload is so useless. Thanks.

Did you put the judder springs back in?

This test does not take into account the resonance of the intake system when the bike is running. This is just backyard "engineering." Not quite the same as those pesky Japanese automotive engineers use with their fluid dynamics testing. Leave engineered products alone!

Do you have any footage of reinstalling the right crank case cover back on? My clutch lever isn't operating correctly after I put it in place. Anyone can help?

Mine shows up tomorrow. I'm glad I found this. Thank you!!

I'm confused. What is powering the relay switch? I presume that the secondary circuit is being powered by the lead from the ABS fuse box, hence the on/off at the handlebars. As far as I can understand, you have only described one power source, whereas a relay requires two power sources. I'm scratching my head here.

in camshafts, it is not only the duration that counts, there is also the survey (subtract the side measurement from that of the highest point) and one of the factors that most influences torque and hp is certainly timing! even if the camshaft measurements are identical, the start of opening and the start of closing of the valves may vary

I have a question I hope you can answer. I installed a G2 Ergonomics throttle body and a quicker cam. My problem is the cables bind at full right lock despite adjusting for maximum slack. You removed the nut on the adjuster at the carb and the adjuster is screwed all the way down. Does that position and removal of the nut provide the greatest amount of slack in the cable?

Thanks, but it would have been better to see when you do it 😜

Amazing video!

Hi, please advise. what amount of oil for the rear shock absorber without expansion tank for suzuki DR 650?

Great video!! Thank you

help how do you unlock it to move it? I have the allen key but it doesnt seem to catch anything. do I need to raise the back of the bike or can it be done on the side stand, any help apricated

Sorry if I write you here, to talk about the Honda CRF300 seat removal but on that video the comments seems not to be allowed. I found your solution for the seat removal very nice. I only have one doubt: with this solution the saddle is held in place by two bolts screwed onto the plastic mudguard. I wonder if the plastic mudguard is strong enough to withstand the forces that arise from the movement of the body on the saddle. What do you think about it? Thank you

Well done

I thought this was going to be a problem too but then I noticed that the airbox lid has little tabs that hold those rubber tabs in place and keep them from moving.

Leaving the small plate out the 250 clutch is a bad idea its there to aid smooth take up because the CRF's have no rubber shock pads in there rear sprocket hub leaving that out will wear chains and sprockets out twice as fast 😁🤘

No dyno results?

Thanks for sharing this. It's funny I came across your video after having issues of my own on the CRF 300 Rally. When doing maintenance I took the filter out & found a lot of dust in the air box past the filter. At first I blamed myself & then started looking into the fit & was shocked how much movement there is with the Hurricane & how flimsy the outer edge is. To solve the issue, I ordered a Twin Air Filter & installed the Hurricane inside it. It was easy to peel back & remove the outer rubber off the Hurricane leaving it with a nice fit inside the Twin Air cage c/w the Twin Air pre-filter. Hurricane Filters are probably just fine in other applications, but I would never recommend the CRF300 Filter as it comes from Hurricane. Problem solved & now fits secure.

I did the mod and I love it!!! ThANK YOU for posting the guide.

FYI..... Finding the rattle doesn't solve it. That's probably not even the source of the rattle... What did you do to solve it?

Great video

... 2:45 ... do you mean the resonator will not be installed? It is not needed? It is there "to take intake noise out of the bike"? Yeah, I'm confused.

I thought the rattle was caused by the PAIR valve?

My rattle went away when I took the reed valve out of the valve cover. Definitely was not in the clutch... at least on my bike.

F()cking nice. I have my bike tore apart doing these modifications right now. Removed the evaporative control system. Removed in intake snorkel then enlarged the intake. I added the CBR300 High Flow Airbox Velocity Stack and the air box lid with the "frog skin" from 550 Performance. I have a stage 1.5 ECU coming next week. Added the full RS-4 Yoshimura exhaust (which I highly recommend). I might add the CBR cams but I doubt it. I'm loving this bike, but if I want more power the only real option is to install the big bore kit from 550 Performance which I will never do. After I fix this all up I'm going to ride it for a while then buy the KTM 500 EXC-F for more power. I will never sell my CRF 300L but sometimes I need more power and speed so I'll get on my KTM 500 for that. But for longevity, durability, and low maintenance I will ride my Honda. I have a BMW 1250 GSA but I ride my little Honda 300L much more than that 600 pound BMW.

Very good info and video. any info on using twin air filter

What is that Needle valve bleeder official name? and where do I get a rebuild kit .?

... 19:00 ... Is that red filter oiled? If it is not, that will cause even more restriction. Loving this video. Thank you for doing it. . Jeff .

Hi Mate, Where are you located Do you do any crf300L work for others for money?

Any chance of getting a wiring schematic? As a non-mechanic I found the video a bit hard to follow when you were pointing out the various leads from the fuse box and where to connect them on the relay.

How did you remove and install the spring?

Great video's. Is this one cam replacement suitable for both Lvl 1 or lvl 2 ECU refresh?

The 300L clutch is a better design & that’s why Honda did it. Your going backwards here if you install in a 250L clutch, both designs are good.

These rust and brake down really fast. Juts a heads up..

Well done, thanks heaps.

Its a Honda. Just ride it hard 😅 thanks for the video!

I use hex key, spanner and a hammer 😂💪

Thank you for the tip. It’s too bad you didn’t show the exhaust camshafts side-by-side, just like the intake you could shown them being the same like you mentioned. What was the measurement of the lobe on the exhaust side?

Nah. That's typical of most motorcycle pressure plates. The springs are loose when not installed. The 5k rattle is likely the decompression ring on the camshaft. They disengage as RPM climbs using centrepital force and loosen up as the engine wears in. Its a harmless noise. If you ever upgrade the camshaft, they often delete the decompression ring... i.e. Hotcams stage 1 upgrade.

Hey Aaron, is it possible to send you a video of the rattle im getting on my CRF 300L? Ive just documented it and noticed that it goes away when clutch is pulled in.

I was born with a bend in my rod.

Mixing spring rates puts a differential side load on the forks , it’s much better to use the same rate springs on both sides . Although it’s more expensive.

Thanks for sharing this vid!

Thank you so much for the testing.

I went this route but its to harsh. Im 95kg and the preload spacer is at 30cm( cant be less) and combination of oem fork spring and dr650se fork spring is to harsh, even on large bumps at speed I cant use more then 13cm of fork travel..and thats only 60%. Rider sag is 5cm and should be 6.5-7cm. So I only recomend this option for full travel with bagage.