CBR300R - How to replace the chain and sprockets
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- čas přidán 18. 07. 2020
- Your chain will become loose over time due to wear. This can usually be resolved by tightening the chain, but sometimes you'll need to replace it along with the sprockets.
Special thanks to my wife for helping with this video!
www.buymeacoffee.com/lightnin...
Filmed with a Canon Vixia HF R800 and edited in Lightworks 2020.1 pro.
Voiceover recorded in Audacity with a Blue Yeti mic.
I tried to remove the rear sprocket without an impact and it's near impossible without stripping the hexes. I'd suggest calling shops and seeing if they'll swap the sprocket if you bring them the wheel. I found one that charged me $20 for basically 15 minutes of work. Totally worth it and I didn't risk stripped hardware.
That's a super good tip! I pinned your comment so hopefully other folks will see it.
Thanks for sharing :)
@@lightningfrog27 question with installing the sprocket flange. Did you have to use a mallet to get it to seat? Mine isn't sitting flush after putting my weight on it.
@@sly9889 Talking about the step that is shown around time stamp 4:31 in my vid?
I did actually try to use a mallet at first, but it didnt seem like it was making any difference (so i didnt include that footage in my video). Basically, the sprocket assembly is just sitting into some rubber dampers, so it's going to seem loose. Once i got it back on the bike (captured by the swing-arm tighted by rear axle), it seemed really good.
@@lightningfrog27 I saw the mallet in the background and was wondering if you used it off camera. I ended up jumping around on mine to get compressed enough to fit in the frame.
Thanks for the help and looking forward to future videos!
It's easiest when you loosen the nuts on the sprocket while the wheel is still on the bike
I like your vids about the CBR300R very much! Keep it up. 😊 I am going to watch them all. 😄
Great video, helped me get through this project. I ended up needing a friend to help me torque the rear sprocket hardware (new bolts and nuts ordered from partzilla for like $20) to prevent stripping it. Definitely needed an impact on the original nut alone with standing on the hub and using a foot to keep the allen/hex from moving (even jammed the old sprocket teeth against a metal cabinet + used an extractor socket since the last nut stripped). Only thing I noticed is that the up/down arrow on the rear swingarm next to the axle bolt is supposed to be to the left of the axle nut and align with the green area above around the 5:20 mark in the video. Adjusted the chain for 1" play and it's been running great now, used to skip teeth/hesitate/jerk on low rpm pulls. Thanks again for making this!!
Glad to hear you made it through and that my video helped!!
U have amazing videos... thanks brotha
thank you man its so good to me
Great video thanks
can you add videos of brake rotor replacement for cbr300r
Love your videos, thanks very much! Btw, I have a cbr250 and there is uneven chain tension, what could be the cause? I’ve heard it’s the single piston engine giving pulses of power. What could be the fix?
Glad you like the videos, and thanks for taking the time to watch and comment :)
For tensions issues, I would check a couple things:
1) are the adjustment nuts even on the left and right side of the swing arm?
2) is the rear axle properly torqued?
3) are there any stiff links in the chain?
For what it's worth, when im riding my (single cylinder) CBR300R, the engine speed is usually between 3000 and 7000 rpm. We'll call it 4000 rpm for an average to make the math easy....since it's a 4-stroke engine, we know it takes two full crankshaft rotations to make the intake, compression, power, and exhaust strokes...which means we should be getting approx 2000 power strokes per minute. If my math is right, that means we're getting over 30 "pulses" of power per second, so i cant imagine that would cause uneven chain tension.
You just saved me $170. Hope I don't die after doing this myself on the weekend ha.
Any follow up? Did you not die?
Question about the impact wrench. Would any impact wrench do, or does it have to new pneumatic? I'm a beginner on doing solo maintenance trying to learn, so go easy on me lol
Yeah, any impact will do. I used pneumatic because that's all I had when I made the video. Personally, I think I prefer battery powered impact wrenches because my compressor is honestly a little too small to get good performance from my pneumatic, and battery power is more portable.
Congrats on starting to build the DIY maintenance skill - finishing solo projects feel great, and save a ton of money.
Good luck!!
What did you torque the front sprocket retainer bolts to? the two 10mm ones. I broke off one of mine in the sprocket trying to tighten it lmao
Did you ever figure it out?
Yikes! The chain removal sounds scary, but doable. If you were doing sprocket replacements on a rear wheel more often, would you build a jig to hold the sprocket?
I bet there's some fancy holding tool that dealerships have. I don't think I'd build something since chain and sprocket replacement is doesn't happen very often.
FYI I got the same kit and my rear sprocket that was aluminum completely wore out let me know how long yours last
did you replace yours? if do what did you get?
What is the part called that the sprocket is held onto by a nut and bolt? I looked at mine today and found two huge chips in the circle that sticks out towards the chain. Not sure what part needs to be replaced or if it’s even safe to ride like that
Around time stamp 2:20 there is an exploded view of the rear wheel assembly. I think you're describing the "driven flange".
Without a robust understanding of the forces on that component (and any stress risers caused by the damage), i'd recommend doing the safe thing and just replace it. I did a quick ebay search just now for "CBR300 driven flange", and it looks like you can find a replacement for about $30.
Good luck!
@@lightningfrog27 after looking at photos from searching “driven flange” yes that is exactly what I’m describing thank you! I’m going in for my second service Wednesday and hopefully they can replace it then
Wait, you own the press out tool, but you cut your chain anyway?!
Also can you link the video for reinstalling the front sprocket?
haha...yeah. Actually, i just couldnt find the chain breaker tool when i needed to pull off the old chain, so i just cut it off lol.
Here's a link to the bike reassembly. The front sprocket installation is at about a minute and 16 seconds
czcams.com/video/-Wm_Bmi_YzI/video.html
how many miles did the bike have when you did the change?
Close to 10k.
That said, I don't know if it was the factory original chain. The life of a chain depends a lot on whether you maintain the right tension, and keep it relatively clean and regularly lubricated.
Doing mine over the winter. My bike lives outside half the year and gets rained on and I don't clean or lube as much as I should. Maybe every 1-2k miles lol it has 7.5k on it.
haha...yeah, that would do it. i try to spritz on some lube after each time i gas up.
do you prefer the clip style master link or the rivet style?
@@lightningfrog27 definitely rivet is more secure
What size torx bit is that for the rear sprocket?
It's a 6mm hex key (not torx). 👍
@@lightningfrog27 ok thanks so much. About to ride my giant grom to the hardware store to get a grinding wheel and a couple other things to switch out my chain/sprockets. I’ve had the parts a while. Chain is finally needing to be changed
Hello from Russia! Thanks for you videos, now I buyed New Honda cb300r 2020 and if it possibile you can send me manual an engine, becosuse I can t find it. Thanks.
Torque specs for rear sprocket?
Looks like the driven sprocket nuts (qty 6, thread diameter 10 mm) calls for a torque of 55 ft-lbs (or 75 N-m if you're into metric torque units!)
@@lightningfrog27 bro thanks so much. Believe me I’m not lazily asking. I scoured the internet to no avail🤦🏻♂️. Maybe I just suck🤷🏻♂️
lol...no trouble at all my dude, I went through all the same hassle when I was working on my bike, so I feel your pain!
Lucky enough for me, I found a copy of the factory service manual, so that's where I'm getting my numbers from.
If I was better at this game I would have put important info like the torque specs into the video 🤪
Good luck on your project!
I come here to say thank you. Also I had a trick to remove the sprocket bolts without an impact driver. You may need a breaker bar to make it easier.
I also uploaded a video for it:
czcams.com/video/e5Dl3ImQLvM/video.html
TL:DR, put the sprocket back on the axle, but without the wheel.
Thanks for sharing the tip! I'll have to try that next time my chain is due.
Dude did front sporket has a bit of freeplay
Yeah, just a little, and that's actually just the tolerance of the transmission gears. 👍