bike keep cutting out

[stranger12]

hi all,

my 125 is keep cutting out when turned on in the morning unless switched on with full chock. i turn it on and then give it few rev to 4-5k and then half the chock but again it dies so i end up just driving it with half chock or 1/4 chock for around a mile and then turn the chock off

is this ok or normall ? how one should warm up his bike ?


also when getting home from work , the bike keeps cutting out when idle or behind traffic light . with choke or without it , are there any adjustments that needs to be made to the carb in order to keep the rev higher during winter so it won't cut out. i am asking because if i rev it to 2-3 while waiting in traffic or behind light , it won't cut out but as soon as i let the grip go , it will cut out after few mins

so i believe it is either because it is very cold or the carb need adjustment to increase the idle rev to 2-3 k


thanks for all of your helps

[stranger12]

can it be due to spark plug ?

[P.addy]

You want to set the idle when the bike is hot to around 1400rpm.

Cold and for the 1st mile or so, have the choke on if it has been left for over say... 2 hours in this cold weather.

When its warm, no need for choke.

[Srengam]

Yeah in this weather you may need your choke on for longer, 1 mile or more is pretty normal.

Idle problems could be idle jet issues, maybe a blockage or gummy, depends on the bikes recent history (recent usage), hows it been recently or has it been sat up for / or recent purchase?
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Suzuki GSX600F Katana (1997)

[Rogerborg]

It's a 125, it should be able to come off the choke in seconds. Lawd's sakes, I start my 500 on full choke, ride away immediately, and I'm off choke by the second corner on Scumbag Estates.

You'll want to increase the idle speed and possibly enrich the idle mixture. How that's done is entirely down to your bike.

What bike do you have? Do you have a manual for it?

I'm going to stick my neck out and assume that you've got a CG or Chinese copy (fair odds), in which case you're looking for these:

https://2.bp.blogspot.com/__DYtEEjm5wE/SdE2lp3cYgI/AAAAAAAAABo/92yQIiecTJM/s320/carb.jpg

If you've got a bike designed in the latter half of the 20th century though, where the choke also increases the idle speed, then I'd go with 'blocked idle jet'. That's a carb strip, you can start mucking around with Redex or a carb cleaner spray, but you're only wasting time and money.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[P.addy]

[bikersupermot...]

[Rogerborg]

GPZ is water cooled, and I very much doubt the OP is on a 2-smoke.

Anyway, he's apparently sorted his problem, so that's all right.
____________________
Biking is 1/20th as dangerous as horse riding.
GONE: HN125-8, LF-250B, GPz 305, GPZ 500S, Burgman 400 // RIDING: F650GS (800 twin), Royal Enfield Bullet Electra 500 AVL, Ninja 250R because racebike

[Nick_Giles]

Think it depend on the bike.

CG I had took about 1/4 - 1/3 of a mile before it was happy off choke.

ER5 needed full choke to start from cold and was happy within a few hundred yards without any.

Hornet is full of beans on start with choke and is able to be reduced to 1/2 choke straight from firing up. Totally off after about 1/4 mile and a bit less since iridium plugs fitted last weekend.

Never had one but I am told a GS500 takes nearly a decade before its happy without choke.


Nick
____________________
Peter Cook: "I have learned from my mistakes, and I am sure I can repeat them exactly".

[stranger12]

[P.addy]

Your idle is miles too high.

What bike?

[stranger12]

125 xs

it is usually on 1 so i put it on 2 , it is high ?