GSXR250 help - bogging out [Archive]

lone_slayer

13th February 2011, 06:37

Hi guys more problems for my little gsxr250 just when i think all is well....
Well the bike is starting great and seems to run fine and High revs it ldles fine but sometimes it will bog down when i go to take off, cant hill start on it if iam lucky to get it moving i would be at slower than walking speed no matter where the throttle is.
Probably is worse when its warm. Any ideas will be greatly appreciated

The Baron

13th February 2011, 06:44

If it revs - worn clutch come to mind.

lone_slayer

13th February 2011, 06:49

Have only recently replaced the clutch plates and the feel the old clutch plates gave was very different when its 'Bogging' it wont rev at all but will still idle if no accelerator used.

Juzz976

13th February 2011, 08:15

Sounds like too much fuel at low rev... idle air screw possibly.

or

stuck choke or worn choke seals (assuming its not air restrictor but fuel richening type)

or

fouled up spark plugs?

you don't use your choke to start it when its not snowing do you?

lone_slayer

13th February 2011, 08:21

first start of the day iam always using choke after that dont really need it for the rest of the day... Just put new plugs in yesterday with no change Just been playing with it and if i spray start ya bastard on the rubber inlet hoses (between carbs and engine) there is a very slight increase in revs . Could this be causeing my problem?

Juzz976

13th February 2011, 08:45

next time you start it don't use choke, have gears on ready and go ride straight away without letting the revs drop too low like under 6000rpm. Just see how that goes for ya.

http://www.kiwibiker.co.nz/forums/showthread.php/131394-Starting-issues?p=1129917364#post1129917364

lone_slayer

13th February 2011, 09:15

Bike starts fine and runs fine over 6000 all the time the problems are at lower revs mainly start off/hill start

Juzz976

13th February 2011, 10:32

yep, still thinking too much fuel...

may pay to check ignition leads are on good.
sometimes the leads are straight wires (not inductive leads like cars) at the socket they have a current limiting resistor and sometimes they need a clean up, or they loose or the socket isn't screwed onto the lead properly.

A good old thrashing would sort out an overfueling problem

GOONR

13th February 2011, 10:39

I had the same problem with my 250 bandit, had the carbs cleaned and balanced.

Problem gone.

lone_slayer

13th February 2011, 11:40

just had the carbs balance and no change

FJRider

13th February 2011, 12:07

Have only recently replaced the clutch plates and the feel the old clutch plates gave was very different when its 'Bogging' it wont rev at all but will still idle if no accelerator used.

That "feel" was the clutch slip(ing) ... it is a 250 ... so ride it like a 250.

They need the rev's to get the power ... under 6000 RPM ... it wont have the horsepower (or torque) it needs to get you going properly.

I imagine it rev's out to about 18,000 RPM (correct me if I'm wrong... often am)

6000 RPM is bugger all in the great scheme of things ... 250 wise anyway ...

hayd3n

13th February 2011, 12:44

lone_slayer

13th February 2011, 14:28

yeah the idle is reasonably smooth. have recently replaced the 'carb boots' with other second hand ones and the feel is quite similar to what was going on then only much worse last time... any idea on what i can use to seal them up better?

Cam_Valk

13th February 2011, 17:06

Haha.
I too have this problem, but to get around it, i just rev it a bit more before i drop the clutch.
Would be interesting to know how to fix it.

lone_slayer

14th February 2011, 06:48

Tightend up the carb boots yesterday and it was little better so iam thinking thats my problem wont know unless i can seal them up better. Any ideas?

Would also like to thank the 2 that helped me out on broadlands road when my accelarator cable got stuck i forgot my tools pushed the bike for about 2 k's on a bloody hot day and it was probably a 5 min fix. Thanks guys

lone_slayer

14th February 2011, 15:00

Ok am picking up some more manifold boots after work today will give them a try by the weekend and will let you know how it all goes

MSTRS

14th February 2011, 15:04

You have taken it to Katman, haven't you? He LOOOOVES old Suzukis...

Cam_Valk

14th February 2011, 16:40

Tightend up the carb boots yesterday and it was little better so iam thinking thats my problem wont know unless i can seal them up better. Any ideas?

Hey dude.
Mind posting a picture of these 'boots' for me?
Would be interesting to compare them to mine.
Thanks

lone_slayer

14th February 2011, 17:20

Well got some pics of the boots the ones on the white background are the ones i got today.
whild i had the tank off I sprayed with start ya bastard 1 and 2 the revs went down while 3 and 4 didnt change so when i have time ill replace 1 and 2 and see what happens

http://www.kiwibiker.co.nz/forums/album.php?albumid=3936&attachmentid=232151
http://www.kiwibiker.co.nz/forums/album.php?albumid=3936&attachmentid=232150
http://www.kiwibiker.co.nz/forums/album.php?albumid=3936&attachmentid=232149
http://www.kiwibiker.co.nz/forums/album.php?albumid=3936&attachmentid=232148
http://www.kiwibiker.co.nz/forums/album.php?albumid=3936&attachmentid=232147
http://www.kiwibiker.co.nz/forums/album.php?albumid=3936&attachmentid=232152

lone_slayer

18th February 2011, 19:43

Ok used some sealant and replaced the rings that tighten onto the carbs with better ones (dont know their names at the moment) all seems sealed up now still not running 100% but just before i realised there was a air leak I had the carbs balanced.

Would I need to get them re-balanced now that the leak is gone?

lone_slayer

18th February 2011, 21:17

lone_slayer

19th February 2011, 07:13

bump :scooter:

lone_slayer

19th February 2011, 10:30

was also wondering if i should adjust the pilot screws?
any help much appreciated I would really like to go for a ride today :violin:

lone_slayer

20th February 2011, 08:20

ok played with the pilot screws and its a bit better now but i have another question about these bikes.

When I go for a ride it normally revs right round nice and smoothley then at about 15k it slows down then just over 16k it really takes off like I have a shit load more power any ideas on how to smooth this out?

lone_slayer

27th February 2011, 12:39

took it in and got it checked out I was only running on 3 as a coil was playing up put another coil on and took it for a ride today and shes going good again still a bit of hesitation at lower revs ocasionaly so would still like try a differennt CDI on it but its running fine if I can try another CDI it will just let me and the my mechanic know not to look there anymore... and have to say guys if your in Taupo Steve from W.O.T Motorcycles has been great has had alot of time for me and is more than happy to have a chat...

lone_slayer

14th April 2011, 07:58

I got another CDI the other day with no change so I now have a CDI for sale if anyone is need let me know.... Also sorted out the bogging it was a mix of 2 things 1st the idle air screws were 2 far open.... only 1.5 turns on the GSXR250 not the 2.5 you find posted on most posts.... (www.gsx-r250.com had it right) and I had a loose spark plug lead. Took the bike out the other day and wow she was running great.... I am of a mind of changing the rear sprocket when the chain gets changed mainly because at the moment you are not really using the top 2 gears unless cruising at 120. But bikes going great now thouh only 3 months till upgrade time so well I guess all my time and work gets to be passed onto someone else.... Oh well....