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CB125 T 89 idle problems*

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supra3turbo
Nova Slayer



Joined: 11 Mar 2012
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PostPosted: 13:22 - 31 May 2012    Post subject: CB125 T 89 idle problems* Reply with quote

Hi all,

I got my bike rebuilt and it started first time, after a few carb bowl seal issues.

I cannot get it to idle what so ever, and it only starts with the choke on, it still runs if you turn the choke off, but you have to keep revving it. Ive had the idle/pilot jets out and i cannot get anything through the little hole in the screwdriver slot, but im not sure if your supposed to be able to on that jet, but i would presume so. Could that be the problem?

Im not sure if a bike has to be running for an MOT but id like it to be, and i plan on booking it this weekend or early next week.

Thanks - Joe Smile
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Boydy
Borekit Bruiser



Joined: 12 Mar 2012
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PostPosted: 17:21 - 01 Jun 2012    Post subject: Reply with quote

yeah there should be a clear hole through the jets with no blockages or any muck at all anywhere near it.
It does sound like not enough fuel is getting through your idle jet. Maybe you could try getting it out again and giving it a good blow through and a clean incase it is blocked.
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Usher4566
Spanner Monkey



Joined: 29 Apr 2011
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PostPosted: 18:22 - 01 Jun 2012    Post subject: Reply with quote

Give all jets a blow with compressed air or carb cleaner all holes possible
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Walloper
Super Spammer



Joined: 24 Feb 2005
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PostPosted: 18:36 - 01 Jun 2012    Post subject: Reply with quote

Strip some copper wire to make a pick and try to poke that through the orifices.

Carb/Brake cleaner straw held over holes and skoot.
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supra3turbo
Nova Slayer



Joined: 11 Mar 2012
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PostPosted: 14:32 - 05 Jun 2012    Post subject: Reply with quote

I tried everything with them, they were completely blocked i had another mechanic look at them who builds race engines and he said they were corroded solid, Im going to order some Keihin star #38 pilot jets for it now Smile

Thanks for your help guys
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supra3turbo
Nova Slayer



Joined: 11 Mar 2012
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PostPosted: 14:34 - 05 Jun 2012    Post subject: Reply with quote

Im ordering 2 of these now:
https://www.ebay.co.uk/itm/Keihin-CVK-FCR-PWK-PE-PD-PWM-PJ-pilot-jets-N424-21-38-/260951657963?pt=UK_Motorcycle_Parts&hash=item3cc1ee4deb#ht_796wt_905
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nightshaddow
Nearly there...



Joined: 18 Feb 2008
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PostPosted: 15:52 - 05 Jun 2012    Post subject: Reply with quote

supra3turbo wrote:


ouch near enough 16 quid

my carbs are not running right on mine either so i bought this

https://www.ebay.co.uk/itm/250990615471?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1438.l2649

does both carbs with everything included
38 pilot, 88 main X 2
Gasket set X 2
Needle X 2
Air screw and Spring X 2
Float Valve X 2
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supra3turbo
Nova Slayer



Joined: 11 Mar 2012
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PostPosted: 17:15 - 05 Jun 2012    Post subject: Reply with quote

Ah i didn't know whether that kit would work/was the right one you see, ill order that instead. Glad i hung on haha

Thanks - Joe
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