[biglee]

hi my nsr is making a noise when i slow down, going down the gearbox. the sound this like a grinding noise like something stops and the other part keeps moving. this sound only happens now and then, normally when bikes warm after a good blast.

 

[asaniard]

when do you change gearbox oil , last time . i suggest you change it and have a look in the bottom of the bucket how much mettalic dust it brings
also have a look on your sprockets side play on the front and how are the rubbers on the backwheel

 

[macey nsr125r]

when do you change gearbox oil , last time . i suggest you change it and have a look in the bottom of the bucket how much mettalic dust it brings
also have a look on your sprockets side play on the front and how are the rubbers on the backwheel

i agree

 

[Brian]

Mine used to make some weird screeching sound around 3000rpm when i changed the reeds and jets...it rode out tho...

 

[biglee]

Changed gearbox oil about 500 miles ago, my front sprocket does move i can pull it out a little and push it back in. What are the rubbers on the back wheel more details on these would be nice. thanks

 

[Brian]

He may be on about the rubber dust seals on the wheel bearings...

Actually is there any side play in the rear or front wheel? Like,does it wobble if you shake it hard on its side stand? If so your wheels bearings are shot... Dunno if they would make a sound but its worth a go...

 

[biglee]

Thanks going to have a good look tomorrow

 

[Adam]

my NSR made funny noises when slowing down, eventually after a week of this noise the front wheel bearings colapsed i would check all your wheel bearings

just a thought

adam

 

[asaniard]

about the backwheel rubbers (spare 2 on the picture) they work as anti-shock on the chain when you engage a gear . if they are worn you will hear some noise like "clac" when gearing or a train noise when running . very few people has the idea to change them when fitting a new sprockets kit .
http://www.geneva-racing.com/~alains/backwheel.jpg

 

[biglee]

Had alook at bike cant see a thing wrong with it? the problem started after i tuck the back wheel off to clean swingarm. Ive put all the spacers and that back right way because i checked on asaniard picture. The noise only happens after a good hour or 2 riding. could it be a gearbox fault?

 

[lee125]

Had alook at bike cant see a thing wrong with it? the problem started after i tuck the back wheel off to clean swingarm. Ive put all the spacers and that back right way because i checked on asaniard picture. The noise only happens after a good hour or 2 riding. could it be a gearbox fault?

have you adjusted the chain to the correct tightness when you put the wheel back on as it could just be your chain hitting your subframe cause its to slack just a thought

 

[biglee]

No not chain thats adjusted right, i dont know what it is? im going to leave it until it gets worse and then find the problem. thanks for the help everyone