Help, problems with my CBR

[ricksta]

Hey guys, i just got the bike on saturday and after a few days driving i've noticed a few problems... i find that sometimes while waiting at the traffic lights or intersections i have my bike in gear with the clutch pulled right back but it sometimes dies :( so i have to rev the bike... am i spose to rev the bike when i'm not moving? or is there a problem with the bike itself?
also... the bike gets hot very easily... especially when i'm in traffic (having to stop and go all the time)

i'm new with bikes so i have no idea if its me thats causing the problem or is it the bike?

thanks in advance guys :)

[Coyote]

Does the bike lose revs then stops?

[bugjuice]

has the idle been adjusted too low? There's a * shaped black plastic knob near where your left knee would be, which adjusts the idle speed. Can't remember which way is which, but it'll be obvious when you twist it. Turning it one way will raise the idle speed, the other will lower it. Try that and see what happens. If that still doesn't solve your problem, then might be a bit more than that. Post back and we'll see I guess..

As for the heat problem, CBR250s are known for their toasty ways. Just have to be sure that the bike has had a recent radiator flush and is clean in there, and that the fan works too. can check that by letting it stand and idle by itself (when you sort the idle out!), and the fan should start spinning up when the temp goes up. I think it kicks in about 3/4s up the temp gauge, or check it when sat in traffic..

[ricksta]

Does the bike lose revs then stops?
yes


has the idle been adjusted too low? There's a * shaped black plastic knob near where your left knee would be, which adjusts the idle speed. Can't remember which way is which, but it'll be obvious when you twist it. Turning it one way will raise the idle speed, the other will lower it. Try that and see what happens. If that still doesn't solve your problem, then might be a bit more than that. Post back and we'll see I guess..
i just went and check that knob ur talking about... i couldnt see any knob on either side of the bike except for the fuel knob (on, res, off) other than that... no other visible knobs.


As for the heat problem, CBR250s are known for their toasty ways. Just have to be sure that the bike has had a recent radiator flush and is clean in there, and that the fan works too. can check that by letting it stand and idle by itself (when you sort the idle out!), and the fan should start spinning up when the temp goes up. I think it kicks in about 3/4s up the temp gauge, or check it when sat in traffic..
i bought the bike from Red Baron and they service every bike that they're about to sell... maybe they didnt service it that well... damn it. :(

The bike is an 1988 model but its only done 15K

[Coyote]

has the idle been adjusted too low? There's a * shaped black plastic knob near where your left knee would be, which adjusts the idle speed. Can't remember which way is which, but it'll be obvious when you twist it. Turning it one way will raise the idle speed, the other will lower it. Try that and see what happens. If that still doesn't solve your problem, then might be a bit more than that. Post back and we'll see I guess..

Thats what I was going to say

NEVER UNSCREW IT ALL THE WAY!!!!!!!!!!!!!!!! IT IS A REAL SHIT TO SCREW IT BACK ONTO THE CARBS!!!!!!!!!!!!!
Can't stress that enough!

BTW, the attached picture shows what the thing looks like, at least on the RR

[bugjuice]

i just went and check that knob ur talking about... i couldnt see any knob on either side of the bike except for the fuel knob (on, res, off) other than that... no other visible knobs.


i bought the bike from Red Baron and they service every bike that they're about to sell... maybe they didnt service it that well... damn it. :(

The bike is an 1988 model but its only done 15K
The knob might be tucked a little under the frame. It's on the same side as the fuel tap, but a bit further forward, should be mounted on the engine left side (as you sit on the bike).

If the bike was bought not too long ago from RB, then I'd bet a ball that it's been well serviced, so I wouldn't worry too much about that then, and just have to get used to warm legs in traffic. That's what they do, cos they perfer the open roads to the city. Still awesome little bikes tho, I used to have one..
15k is increadably low for an '88 too, good find if that's the case!!

[bugjuice]

NEVER UNSCREW IT ALL THE WAY!!!!!!!!!!!!!!!! IT IS A REAL SHIT TO SCREW IT BACK ONTO THE CARBS!!!!!!!!!!!!!
Can't stress that enough!

BTW, the attached picture shows what the thing looks like, at least on the RR
what was that? didn't quite hear you.. Nice one on the pic :niceone:

yeah, forgot to mention that too. Was in my head, but forgot to type. It's very *very* easy to unscrew it accidently. So just twist slowly and listen carefully to what the engine is doing. If it goes down a little, leave it a sec and see if it stays or picks up. If it rises, then you're on the right track..

[ricksta]

The knob might be tucked a little under the frame. It's on the same side as the fuel tap, but a bit further forward, should be mounted on the engine left side (as you sit on the bike).

If the bike was bought not too long ago from RB, then I'd bet a ball that it's been well serviced, so I wouldn't worry too much about that then, and just have to get used to warm legs in traffic. That's what they do, cos they perfer the open roads to the city. Still awesome little bikes tho, I used to have one..
15k is increadably low for an '88 too, good find if that's the case!!
went for a second look and found it :)... the knob was a little loose.. i could twist it both ways very easily but then i got a bit hard to twist...

umm i had a little play with it and it was a bit hard to tell the difference.... but the rev pointer stays at 1K rpm (out of 20K) this time and the engine didnt die at all... i think i have it on the right setting... but we'll see tommorow wether it works on not when i take it to work.

thanks for the help guys... i might take it back to RB and have it checked on saturday or sunday if the problem doesnt stop.

[GROOMER]

Hey guys, i just got the bike on saturday and after a few days driving i've noticed a few problems... i find that sometimes while waiting at the traffic lights or intersections i have my bike in gear with the clutch pulled right back but it sometimes dies :( so i have to rev the bike... am i spose to rev the bike when i'm not moving? or is there a problem with the bike itself?
also... the bike gets hot very easily... especially when i'm in traffic (having to stop and go all the time)

i'm new with bikes so i have no idea if its me thats causing the problem or is it the bike?

thanks in advance guys :)

Try pulling upto the lights in neutral. If it doesnt die like it has been, then more than likely the clutch needs adjusting out slightly.

[ricksta]

Try pulling upto the lights in neutral. If it doesnt die like it has been, then more than likely the clutch needs adjusting out slightly.
good point there! thanks.

[k14]

Turn it clockwise to increase the idle. The idle for CBR250's is 2200rpm +/-500 so if its at 1000 its way too low. Just turn your bike on and keep turning it clockwise till you notice the idle going high, like up to 5000rpm then slowly turn the knob the other way till it is around 2000rpm.

Mine sometimes dies when it is cold just after starting it. Are you using the choke to start it??

[bugjuice]

you get this fixed yet?

[FEINT]

Turn it clockwise to increase the idle. The idle for CBR250's is 2200rpm +/-500 so if its at 1000 its way too low. Just turn your bike on and keep turning it clockwise till you notice the idle going high, like up to 5000rpm then slowly turn the knob the other way till it is around 2000rpm.



Wow, my CBR idles at 1000rpm as well and it doesn't stall. I didn't know they were suppose to idle at 2200 +/- 500rpm... :whistle:

[Maximus]

Wow, my CBR idles at 1000rpm as well and it doesn't stall. I didn't know they were suppose to idle at 2200 +/- 500rpm... :whistle:


:killingme :whistle: :killingme

[bugjuice]

Wow, my CBR idles at 1000rpm as well and it doesn't stall. I didn't know they were suppose to idle at 2200 +/- 500rpm... :whistle:
if it ain't broke, don't fix

[Coyote]

Turn it clockwise to increase the idle. The idle for CBR250's is 2200rpm +/-500 so if its at 1000 its way too low. Just turn your bike on and keep turning it clockwise till you notice the idle going high, like up to 5000rpm then slowly turn the knob the other way till it is around 2000rpm.

I though it was 1500rpm?

Got mine at about 2000 anyway

[FlyingDutchMan]

1500 is what the manual says... I've got mine there and it runs sweet as.

[FEINT]

I adjusted mine to 1750 just below 2000rpm.. and it is all good. I think it is smoother then it was before. :2thumbsup

[ricksta]

after trying a few different settings i've finally got it in the right spot. it now idles around 1500 rpm and i got stuck in the traffic today and had no problem with the bike stalling or anything so that's great... thanks a lot for the help u guys... especially bugjuice and alarumba u guys rock :Punk:

[k14]

I though it was 1500rpm?

Got mine at about 2000 anyway

Oops, sorry, my bad. Glad you got it fixed.

[kev4eva]

Thats what I was going to say

NEVER UNSCREW IT ALL THE WAY!!!!!!!!!!!!!!!! IT IS A REAL SHIT TO SCREW IT BACK ONTO THE CARBS!!!!!!!!!!!!!
Can't stress that enough!

BTW, the attached picture shows what the thing looks like, at least on the RR


oh shit, i unscrewed it all the way, and it come off... i spend all day try to find the damp hole to screw it back it. any one know where/how to screw it back it...

[MidnightMike]

oh shit, i unscrewed it all the way, and it come off... i spend all day try to find the damp hole to screw it back it. any one know where/how to screw it back it...

Srry but lol.

I know this is a stupid question but how do you multi quote?
:blank:

[quickbuck]

Wow, it was almost a year ago that this thread was started!

I will have a looksey on my 600 tomorrow and see where it goes for sure. Can't say I have ever been tempted to unwind it though.
Adjusted it for the first time in two years (since I bought the bike) for a rider training course last week.

[Cabbit]

*revives*
My CBR250's been doing the same thing..
I'll go have a look for the screw/knob thing after class and say if it's fixed or not when i get home :P

Thanks in advance, yay for old threads!

[Wasp]

so is my bandit but theres also rumors of faulty coils and melted wires for me...

[Cabbit]

I decided not to look for it because it was dark..

but now i'm just not going to touch anything till i find out what's going on..
http://www.kiwibiker.co.nz/forums/showthread.php?p=568039#post568039

=(