rs 125 starting to whine (very rare)

[jamieward]

ive got an little rs 125 and I went for a ride at the weekend and did about 250 miles on it and it was fine !!

on Monday morning I started it seemed fine and then I jumped on it and got to the top of the village and I heard a whine if that is what you can call it. I pulled over and once it stopped moving the whine completely went when I revved it was perfect so I continued to work.

It's rarely happening it seems like it only does it when its under load but im not sure does anyone have any ideas of what it could be or anyone experienced it ?



do you reckon im doing any damage too it


thanks so much jamie
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[jamieward]

ohh I've started to notice its idling around 1k and today I was sat at traffic lights and it just cut out I don't know whether it is something to-do with it but it started right up when I press the electric start button


thanks

Jamie
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[unitynotsocri...]

if its been used for small stop /start commuting then its just a had all the cobwebs blown out its arse.A good stroker needs ahigher rev blast out now and again,stops the exhausts sludging up.

It might be that your 250 run has started the g/box whining,or has worn the rings and little end,but its more probable that the whine is coming from a chain that needs adjusting or a chain/sprocket set thats just been shagged out by some high speed fun.

check the chain and sprockets and check theres no plasticware rattled off and fouling tyre/wheel/chain.

You could pop the drive sprocket cover off just to check the front sprocket has'nt rattled loose on the output shaft.

g/box whines usually come into their own in top gear at higher speeds,g/box damage is noticable even at very low speeds,crunching noises give us clues.

other causes are wheel bearings and fouling brake pads and shoes.
Check the brakes,and wobble the wheels sideways ,any tiny side to side movement can indicate the wheel bearings are on their way out.

Finally ,check the tyres,its easy for cheapo tyres to distort especially if they are given a sudden high speed thrashing after doing years of commuting.An ovalled tyre or uneven tread (have you been doing rear wheel lock ups?) can induce their own vibrations.

Dont neglect your g/box oil.....most strokers (as the personality disorder is defined) pray to invisible gods and never consider the g/box oil needs changing.

if the engines already done a fair bit of work it may be that the crankcase seals or top end has now wanderd into 'top end' service mode...i.e. new piston rings/little end/decoke.

you can check the seals and top end by checking compression measurments,(garage can do it quick and cheap if you remove the plug,)
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[jamieward]

thanks buddy

ive just had a look at the bike and I swapped the gear box oil over. even Though the old stuff is only about 5 month old because I had some spare in the garage (I had a look in the old oil and there was not signs of plastic shards or metal) seems like good news

my next idea was to put the bike on a paddock stand and leave it on tick over I was watching the rear wheel go around. Then I gave it a rev then I saw a little rubber that protects the frame from the chain it was moving around as the chain was moving over it . I don't really know if it should do that. do you reckon it could be anything to-do with it.

ill lube up the chain tonight and double check the chain tension and ill give it goo once over

lets hope it's something and nothing that wont cost an arm and a leg
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[jamieward]

does anyone reckon it could be the water pump ive got a slight idea in my mind thinking it could be that because its only doing it once it gets around 60 degrees and when I stop it goes and when I set off it again it does not come back
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[unitynotsocri...]

if its temperature related it may be a pump bearing or gear begining to wear out.also check your thermostat.
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[jamieward]

im not too sure if its temperature related it could be anything but it only happens if any within the first minuet of riding then it completely sound and its perfect

ill have a look buddy
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[jamieward]

thanks alot for the help mate !! ill have a look tomorrow in the day light
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[unitynotsocri...]

warming up the engine will help then.........
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[jamieward]

I worm it up to about 40 before even jumping on it then I take it easy till it gets around 60 am I do doing the correct thing mate ??


thanks jamie
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[G19RKE]

Yep that's right dude. I start minenn by time I've put my gloves and helmet on its normally about 40-50 an I get on it and keep it below 6 or a couple miles then I start tobgetbit up in the higher revs where it belongs.

[jamieward]

gosh this whine is really starting to do my head in big time

ive just road back from the gym on it and it did it twice within the same run

but asoon as I slow right down to about under 10mph it goes


this really is confusing me big time


anyone got any ideas or not ??


thanks Jamie
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[jamieward]

ive tried pulling the clutch in it does not have an effect on the whining so does that rule out the gear box ??

do you reckon it could be something as simple as a smell end bearing or maybe new piston rings ??
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[unitynotsocri...]

Its worth doing,at least you can check it easily and fix it pretty quick.
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS

[jamieward]

ill check it fully at weekend its just making it awkward because its only doing it once in a blue moon awh well time to stip the head at weekend see what will happen

thanks a lot buddy
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[Efes123]

Don't know your bike, but is it water cooled? A high whine on a car is almost always down to the water pump. Not heard it about bikes though.
____________________
Honda Goldwing GL 1000 Current love
Honda VT500 ED - SOLD
Projects Suzuki GS125 Done, then stolen - Kawasaki GPX750R SOLD - Honda VF750S SOLD

[jamieward]

yer my mate it is mate I don't know weather to give it a top end rebuild I could do with inspecting it first but oh well ill see how I go on and ill report back asp


thanks a lot for all your help people
____________________
first bike was a derbi gpr 50 got some right looks when I fired up lol
second bike is a tuono rs 125 love the bike keeps up with the 600's

[Boxing]

Don't do 40MPH on a cold engine.

And don't rev past 3K RPM's. Let it tick over, get your helmet on and gloves, then go slowly and shift early. Stick to some 30MPH limits if you can, then after warming it up you can pin it.