Montesa 300rr engine noise

[Andy12343]

Hi, I’ve got a 2016 300rr when riding around under load or slight throttle I get some weird noises from the left side of the engine (sounds like a bag of ball bearings) soon as the clutch lever is pulled in it stops, release the lever and it starts again, any help is appreciated 

[kurtas]

Is the bike moving or stopped when pulling the clutch helps?

[Andy12343]

15 hours ago, kurtas said:

Is the bike moving or stopped when pulling the clutch helps?

When it’s moving, even if cruising at 5mph slightly on the throttle, second you clutch it it goes away

[jrsunt]

Drain the gearbox oil and check for metal. 
The flywheel is on the left side. It would be unusual to have clutch related noise there. Could it be output shaft, gearbox sprocket or chain related?

Does it only happen when the bike is moving in gear or does it also happen when moving but in neutral?

Does the sound not happen at all when stationary?

Is the bike new to you or have you owned it a while?

Just looking for a bit more information 

Edited Saturday at 09:04 PM by jrsunt

[Andy12343]

2 hours ago, jrsunt said:

Drain the gearbox oil and check for metal. 
The flywheel is on the left side. It would be unusual to have clutch related noise there. Could it be output shaft, gearbox sprocket or chain related?

Does it only happen when the bike is moving in gear or does it also happen when moving but in neutral?

Does the sound not happen at all when stationary?

Is the bike new to you or have you owned it a while?

Just looking for a bit more information 

Yeah that’s what I thought strange as it’s coming from flywheel side, I’m not sure on the output shaft or gearbox sprocket, only happens when in gear, moving, no noise when in neutral or clutch is pulled in, I’ve had it a less than a year 

[jrsunt]

It will be difficult to pin point the noise without a bit of investigation. If you don’t mind a bit of spanner work there’s a few things you can try. Get a workshop manual if you don’t already have one, they are very useful.

Firstly, take the chain off to see if taking load off the gearbox sprocket makes any difference. If not, put chain back on, you’ll need it on later.
Drain the Gear oil and coolant

Now you need to take the full right side canckcase cover off by removing the brake pedal and kickstart. The kickstart can be very tight on the shaft and can take some prying off. The bolts for the cover are various lengths so make a note or plan of what goes where.

Be careful when lifting the case off, use the pry tabs. There is a shim/washer on the water pump shaft and kickstart shaft that like to disappear. They usually stick to the cover.

Take the clutch apart and basket off, ideally you need clutch holder and impact gun to get the 36mm nut off the basket. (it can be done without with some improvisation)

If the sound is still there when spinning the rear wheel it will likely be gearbox related and possibly an engine split. If the sound has stopped, it’s in something you’ve taken off. 
Good luck

 

[Andy12343]

15 hours ago, jrsunt said:

It will be difficult to pin point the noise without a bit of investigation. If you don’t mind a bit of spanner work there’s a few things you can try. Get a workshop manual if you don’t already have one, they are very useful.

Firstly, take the chain off to see if taking load off the gearbox sprocket makes any difference. If not, put chain back on, you’ll need it on later.
Drain the Gear oil and coolant

Now you need to take the full right side canckcase cover off by removing the brake pedal and kickstart. The kickstart can be very tight on the shaft and can take some prying off. The bolts for the cover are various lengths so make a note or plan of what goes where.

Be careful when lifting the case off, use the pry tabs. There is a shim/washer on the water pump shaft and kickstart shaft that like to disappear. They usually stick to the cover.

Take the clutch apart and basket off, ideally you need clutch holder and impact gun to get the 36mm nut off the basket. (it can be done without with some improvisation)

If the sound is still there when spinning the rear wheel it will likely be gearbox related and possibly an engine split. If the sound has stopped, it’s in something you’ve taken 

thanks bud much appreciated, yeah im capable of stripping it etc just more on the lines of cba lol looks like a strip down it is 🤦🏻‍♂️ thanks again 

[kurtas]

I'd be checking your countershaft sprocket before pulling anything apart, if its worn it might be catching the chain.
Next thing would be as JRSUNT has said and take the chain off and run it in gear and see if noise is affected by the clutch, which means you will have to dig further.