Advice on vibration/wirly sound 97 cr250
Richard Mauri
of dirt biking for 15 years, though the last five I've owned
a CBR. Anyway, I didn't notice at the time of sale that there's
this load wirling sound in addition to the ringdingding, that is
most noticable at low revs. I know it's hard to diagnose over the net,
but I heard someone say it's the water pump. I listened to another 97
CR250 and it didn't have the same wirlybird noise. It's almost a
vibration sound.
So now I've blown my budget on the bike and the wife wants me to
fix it if I can, but it may end up being bearings and crankcase
splitting huh? And I don't have the special pullers and other tools.
Maybe I should take it in, and pay, for a diagnosis, but I've done
enough wrenching that if it's not at first obvious, it means that
by the time they diagnose it, they have it so far apart they might
as well fix it then and there.
I just had a Honda dealer put in a new clutch, and you would've thought
they would've noticed the noise and commented, seeing possible $$$,
but they didn't say anything. I changed the oil 2 rides ago using Rock
synthetic. It is dirty (greenish-gray) and there are some tiny shiny
specks in the oil that you can see in sunlight.
I'd rather snop the progression of bad events early than wait and see.
Any advice?
Thanks, Rich.
David Levy
plates in wrong? When the plates slip it sounds like a turbo - pretty cool
but clutch plates are toast.
Richard Mauri wrote in message <36504E77...@home.com>...
><snip>
> that there's
>this load wirling sound in addition to the ringdingding,
><snip>
>Thanks, Rich.
bill lawrence
bearings, or waterpump bearings. but before you tear into it, check all
the motor mount bolts including the head stay. youd be surprised how
much noise and vibration one loose bolt can cause, but a loose motor
mount bolt will usually get more intense with rpm which leads you back
to a bearing. could even be a rod or wristpin bearing. the only way to
tell is to tear into it. start by removeing the ignition cover and grab
the flywheel and try to move it up and down. any (even very slight)
movement is bad, and that bearing is shot. if it checks out, move on to
the counter shaft (this is a long shot) and remove sprocket and seal
collar and try to move it. if they check out then youll have to pull the
complete clutch side cover and check the other main bearing. and the
water pump. spin the impeller, if it feels gritty or notchy, the
bearings are toast. eliminate the good parts untill you find a bad one.
P.S. the dealer probably never even started your bike when they put the
cluth in it. BILYCLUB
sTeVe?
wrote:
>a CBR. Anyway, I didn't notice at the time of sale that there's
>this load wirling sound in addition to the ringdingding, that is
>most noticable at low revs.
I wouldn't want to say "don't worry about it" but almost every '93-'98
CR I've heard has a "whirring" or "whistling" sound at low revs. I
know every one I've owned has had that same noise. You can hear a CR
coming through the woods a long way off just by the whistle, either
that or the squealing rear brakes.
>I just had a Honda dealer put in a new clutch, and you would've thought
>they would've noticed the noise and commented, seeing possible $$$,
>but they didn't say anything. I changed the oil 2 rides ago using Rock
>synthetic. It is dirty (greenish-gray) and there are some tiny shiny
>specks in the oil that you can see in sunlight.
CR's are notoriously hard on tranny oil. I can change the oil, ride
for 60 miles, and it will come out full of shiny stuff and black as
night. I used to worry about it, now I just change the oil every time
I change my socks.
Steve
aged CR250 pilot
3 '94's and a '96
Bill Gearhart
and the piston was way out of spec. The piston was original (eight years).
After replacing the piston, rings and wrist pin the bike sound "normal", as
well as having alot better power.
I would pull the top end and check it, also check the rod freeplay. If all
this checks out OK i guess your left with possible tranny/clutch, or water
pump impeller sounds.
Good luck with it.
Regards
BillGear
Richard Mauri wrote:
> Just bought a used '97 CR250 after having been out
> of dirt biking for 15 years, though the last five I've owned
> a CBR. Anyway, I didn't notice at the time of sale that there's
> this load wirling sound in addition to the ringdingding, that is
> most noticable at low revs. I know it's hard to diagnose over the net,
> but I heard someone say it's the water pump. I listened to another 97
> CR250 and it didn't have the same wirlybird noise. It's almost a
> vibration sound.
>
> So now I've blown my budget on the bike and the wife wants me to
> fix it if I can, but it may end up being bearings and crankcase
> splitting huh? And I don't have the special pullers and other tools.
>
> Maybe I should take it in, and pay, for a diagnosis, but I've done
> enough wrenching that if it's not at first obvious, it means that
> by the time they diagnose it, they have it so far apart they might
> as well fix it then and there.
>
> I just had a Honda dealer put in a new clutch, and you would've thought
> they would've noticed the noise and commented, seeing possible $$$,
> but they didn't say anything. I changed the oil 2 rides ago using Rock
> synthetic. It is dirty (greenish-gray) and there are some tiny shiny
> specks in the oil that you can see in sunlight.
>
MX Tuner
>CR's are notoriously hard on tranny oil. I can change the oil, ride
>for 60 miles, and it will come out full of shiny stuff and black as
>night. I used to worry about it, now I just change the oil every time
>I change my socks.
Do you have steel or aluminum driven plates?
MX Tuner
sTeVe?
wrote:
>>CR's are notoriously hard on tranny oil. I can change the oil, ride
>>for 60 miles, and it will come out full of shiny stuff and black as
>>night. I used to worry about it, now I just change the oil every time
>>I change my socks.
>Do you have steel or aluminum driven plates?
Doesn't seem to matter. Originally CR's come with (I think) 3 steels
and 4 aluminums? I've always changed them over to all steels at the
first opportunity and the quality of the used oil doesn't seem to
change.
Steve
aged CR250 pilot
Vogt Family
>
> > Just bought a used '97 CR250 after having been out
> > of dirt biking for 15 years, though the last five I've owned
> > a CBR. Anyway, I didn't notice at the time of sale that there's
> > this load wirling sound in addition to the ringdingding, that is
> > most noticable at low revs. I know it's hard to diagnose over the net,
> > but I heard someone say it's the water pump. I listened to another 97
> > CR250 and it didn't have the same wirlybird noise. It's almost a
> > vibration sound.
You know, I don't know if you have a lot of experience listening to
other people's bikes, but I hear a sound from a lot of my buddies' 2
strokes, mostly CRs, that sounds kind of "wirly". I usually notice it
as they are pulling out of camp somewhere. It seems to go with engine
speed because as they let the clutch out it drops and then picks up
again as they accelerate away. I don't know if it is normal or not,
many of them are good riders but not such great mechanics, but I haven't
heard of any failures related to it.
All I am trying to say is that don't rule out that it could be normal.
Maybe you could send a WAV file. :-)
Birken
Richard Mauri
The dealer that put the clutch in said the technician is
meticulous and usually test rides after a clutch rebuild.
He said he'll listen to it and advise me.
Many have suggested "piston slap". If that's the case
it happens to all 2 strokes eventually. What sound does
that make even on non cr's?
- Rich
Gazoo5
two steelsin the center not three