Honda CBR 300 Forum banner
1 - 8 of 8 Posts

·
Registered
Joined
·
8 Posts
Discussion Starter · #1 · (Edited)
Hi all,

Riding home from work today and i noticed a brushing sound (idk how to describe it) when rolling on the throttle and accelerating. It sounds like it's coming from the rear of the bike but i'm not sure.

Went for a ride after to test and it is really noticeable after rolling off the throttle entirely and rolling on again. It's more noticebale in higher gears.

I've had my 2016 300r for about a month or so (bought it off a mate) and it has 26,000 km on it. My mate had it serviced before he sold it to me and I've put about 400-500 on it since i got it.

I'm thinking it could be the clutch as I'm a beginner rider and dumped it quite a bit when i was learning on it. I've also accidently shifted gears up and down a couple of times recently without the clutch (don't judge).

Edit: another possibility i'm thinking is chain. I haven't cleaned it or lubed since it got it but it looks fine and isn't too loose or tight or dry.

Otherwise, the bike runs fine.

Would appreciate any suggestions.
 

·
Registered
Joined
·
72 Posts
Start with the easy stuff, clean and lube up your chain. A couple drops learning to ride shouldn't be a big deal and shifting with out the clutch really isn't either if you slightly let off the throttle to let the gears synchronize enough.
 

·
Registered
2017 Honda CB300FAH (ABS)
Joined
·
38 Posts
As kiwi rider said, sounds like the chain. It should be cleaned and lubed (which also gives a chance to feel for kinks and check tension) every 650 - 800km, though all of us are guilty of going longer. To be safe and since you said it's a 2016 that's new to you, have you verified that the crank shaft recall warranty repair was done on the bike? That one's very important. Good luck.
 

·
Registered
Joined
·
8 Posts
Discussion Starter · #6 ·
Thanks for the replies, everyone!

Update: I cleaned and lubed the chain today and after I removed the drive sprocket cover I saw a massive build-up of grease/old lube pretty much everywhere. I scrapped a lot of it off and don't think I did too bad a job with just chain cleaner, paper towels, and cloth.

Wheel Automotive tire Tire Motor vehicle Automotive design
Sleeve Personal protective equipment Art Bridal accessory Fashion design

Automotive tire Automotive lighting Alloy wheel Automotive design Motor vehicle


However, I have noticed that the original brushing sound mentioned in the OP persists, and might even be more noticeable than before. Additionally, I noticed that the engine was running quite hot today so much that I could feel the heat on my right calf (~20 degree celsius day) and the engine cover was hot to the touch. I've never noticed any heat radiating from it in the last month (admittedly it has been quite cold). Engine oil temps are at three bars and I believe an oil change was done a month ago.

There's also the issue of difficulty shifting into neutral but that could just mean time for a new clutch cable (bike has had problems with clutch before).

So tl;dr weird noise when openning throttle is not chain + new engine heat. Also, the crankshaft recall was done on this bike.

Thanks!
 

·
Super Moderator
Joined
·
5,704 Posts
The three bars are for your coolant temp, not your oil temp and as long as they stay at three bars then your good to go. Check your coolant level is correct though.

Ok, so the standard test when trying to work out if a noise is engine related or drive train related is to get up to road speed and then pull the clutch in (not on the freeway!) and flick the kill switch on the RH control block to get rid of engine noise. If you can still hear the noise then its your drive train ie. Transmission, sprockets & chain, but could also be wheel bearings, brake rotors rubbing etc.
Then, at a standstill rev the engine in neutral. Do you hear the noise increasing and diminishing as you rev it?
 

·
Registered
Joined
·
8 Posts
Discussion Starter · #8 ·
The noise is only in higher gears and only for a short second as you roll the throttle on hard (e.g. after shifting up). Best way I can describe it is a brushing/rubbing sound.

I've looked up some other bike forums wiht similar issue posts and ppl have suggested sprocket issues? Both the chain and sprockets on mine look ok although the rear have a few teeth than are looking more sharp than flat.
 

Attachments

1 - 8 of 8 Posts
Top