Takes forever to warm up

Tylorwashere · August 20th, 2017, 02:44 PM

So I have an 05 ex 250, and once it warms up it runs perfect, however it takes forever to warm up to that point. I have to slowly work off the choke until it will stay running, then let it sit another minute or two until it starts idling at about 1500 rpms, then it will be good to go.

I've had the carbs out and done a pretty basic cleaning, but from what I've been reading it seems like the idle circuit might be clogged? But I feel like if that were the case it wouldn't idle even when warm.

If anyone has any insight it would be great, thanks

ducatiman · August 20th, 2017, 05:30 PM

sounds like a good candidate for adjusting the pilot screws provided.....

A: the pilot circuits are, in fact, clear
B: the EPA tamper caps on the pilot screws have been removed

During your clean...did you remove the tamper caps then pilot screws/spring/tiny washer/tiny oring?

Tylorwashere · August 20th, 2017, 07:03 PM

Quote:

Originally Posted by ducatiman

sounds like a good candidate for adjusting the pilot screws provided.....

A: the pilot circuits are, in fact, clear
B: the EPA tamper caps on the pilot screws have been removed

During your clean...did you remove the tamper caps then pilot screws/spring/tiny washer/tiny oring?

The epa caps were removed (one screw was tight closed and the other 3 turns open, they are both at about 3 and a half turns out now). Everything was removed and cleaned with carb cleaner then blown out with compressed air.

MrAtom · August 20th, 2017, 08:01 PM

I just ride it gently around the block a few times. It warms right up.

Tylorwashere · August 20th, 2017, 08:06 PM

Quote:

Originally Posted by MrAtom

I just ride it gently around the block a few times. It warms right up.

Mine likes to stall when I stop if I do that

Ram Jet · August 20th, 2017, 09:19 PM

Quote:

Originally Posted by Tylorwashere

So I have an 05 ex 250, and once it warms up it runs perfect, however it takes forever to warm up to that point. I have to slowly work off the choke until it will stay running, then let it sit another minute or two until it starts idling at about 1500 rpms, then it will be good to go.

I've had the carbs out and done a pretty basic cleaning, but from what I've been reading it seems like the idle circuit might be clogged? But I feel like if that were the case it wouldn't idle even when warm.

If anyone has any insight it would be great, thanks

I've got to believe it's your carbs. My bike gets 1/2 choke and the choke is off after two minutes of running and it idles at 1000 R.P.M. The other day my temperature gauge read 67 degrees when I started the bike, exactly 60 seconds later it read 130 degrees. After my first start of the day I never have to choke it again. Things might be different if it was 40 degrees out.

My bike warms-up quickly because I have modified my cooling system.

Bill

jkv45 · August 21st, 2017, 06:48 AM

Quote:

Originally Posted by Tylorwashere

Mine likes to stall when I stop if I do that

Correct idle mixture and idle speed settings should give you a ride-able bike in just a couple of minutes from starting cold.

ducatiman · August 21st, 2017, 08:14 AM

possible valve clearance issue? tight can undeniably cause weird starting/running issues. Need to eliminate.

Tylor...current mileage and mileage at last known valve clearance check?

Tylorwashere · August 21st, 2017, 10:03 AM

Quote:

Originally Posted by ducatiman

possible valve clearance issue? tight can undeniably cause weird starting/running issues. Need to eliminate.

Tylor...current mileage and mileage at last known valve clearance check?

Current mileage 18.5k, last check unknown

ducatiman · August 21st, 2017, 01:34 PM

3.5 turns should deliver adequate mixture, preventing super lean long warmup.

At 18k with no known valve check...would be advisable to do. These 250's are especially sensitive to tight valves....I'm sure others will agree and chime in here.

Lazarus · August 21st, 2017, 01:52 PM

Waited till 10k miles to even check my valves (I know, shame on meeeee) every one of them was out of spec. The exhaust valves were way tight and the intake valves were on their way over to being too tight as well. Had some minor hard starting issues and stalling every so often. She just loved to mess with me, adjusted the valves and she is a very happy girl.

Tylorwashere · August 22nd, 2017, 12:52 AM

Sounds like I have a weekend project now

A.J. · August 22nd, 2017, 10:05 AM

I think it might be nothing. These bikes are cold blooded. If it takes 3-5min to warm up I wouldn't go dismantling the carbs. JMO
Then again after I warm my bike up once she's warm the rest of the day and no choke needed. So if you aren't able to do that then what these guys are saying is probably necessary.

ducatiman · August 22nd, 2017, 10:26 AM

at 18K (with no known history of valve adjustment) I'd consider a check mandatory...then reevaluate results from that point.

August 20th, 2017, 02:44 PM	#1
Tylorwashere ninjette.org member Name: Tylor Location: Michigan Join Date: Aug 2017 Motorcycle(s): 2005 Ninja 250 Posts: 78	Takes forever to warm up So I have an 05 ex 250, and once it warms up it runs perfect, however it takes forever to warm up to that point. I have to slowly work off the choke until it will stay running, then let it sit another minute or two until it starts idling at about 1500 rpms, then it will be good to go. I've had the carbs out and done a pretty basic cleaning, but from what I've been reading it seems like the idle circuit might be clogged? But I feel like if that were the case it wouldn't idle even when warm. If anyone has any insight it would be great, thanks

August 20th, 2017, 05:30 PM	#2
ducatiman ninjette.org certified postwhore Name: Gordon Location: new york Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot. MOTM - Nov '18, Mar '17	sounds like a good candidate for adjusting the pilot screws provided..... A: the pilot circuits are, in fact, clear B: the EPA tamper caps on the pilot screws have been removed During your clean...did you remove the tamper caps then pilot screws/spring/tiny washer/tiny oring? __________________________________________________ gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com

August 21st, 2017, 08:14 AM	#8
ducatiman ninjette.org certified postwhore Name: Gordon Location: new york Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot. MOTM - Nov '18, Mar '17	possible valve clearance issue? tight can undeniably cause weird starting/running issues. Need to eliminate. Tylor...current mileage and mileage at last known valve clearance check? __________________________________________________ gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com

August 21st, 2017, 01:34 PM	#10
ducatiman ninjette.org certified postwhore Name: Gordon Location: new york Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot. MOTM - Nov '18, Mar '17	3.5 turns should deliver adequate mixture, preventing super lean long warmup. At 18k with no known valve check...would be advisable to do. These 250's are especially sensitive to tight valves....I'm sure others will agree and chime in here. __________________________________________________ gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com

August 22nd, 2017, 10:05 AM	#13
A.J. ninjette.org guru Name: AJ Location: Green Valley, IL Join Date: May 2017 Motorcycle(s): 2001 Kawasaki Ninja 250r(SOLD) 2006 Kawasaki Ninja 250r full Muzzy(my pride and joy) Posts: 331	I think it might be nothing. These bikes are cold blooded. If it takes 3-5min to warm up I wouldn't go dismantling the carbs. JMO Then again after I warm my bike up once she's warm the rest of the day and no choke needed. So if you aren't able to do that then what these guys are saying is probably necessary. __________________________________________________ "A car or truck will get you from point A to B. But a motorcycle, that is the point." -unknown

August 20th, 2017, 08:01 PM	#4
MrAtom . Name: . Location: . Join Date: Aug 2014 Motorcycle(s): . Posts: A lot. MOTM - July '15	I just ride it gently around the block a few times. It warms right up.

August 21st, 2017, 01:52 PM	#11
Lazarus ninjette.org member Name: RJ Location: PA Join Date: Dec 2015 Motorcycle(s): 2008 Ninja 250 Posts: 210	Waited till 10k miles to even check my valves (I know, shame on meeeee) every one of them was out of spec. The exhaust valves were way tight and the intake valves were on their way over to being too tight as well. Had some minor hard starting issues and stalling every so often. She just loved to mess with me, adjusted the valves and she is a very happy girl.

August 22nd, 2017, 12:52 AM	#12
Tylorwashere ninjette.org member Name: Tylor Location: Michigan Join Date: Aug 2017 Motorcycle(s): 2005 Ninja 250 Posts: 78	Sounds like I have a weekend project now

August 22nd, 2017, 10:26 AM	#14
ducatiman ninjette.org certified postwhore Name: Gordon Location: new york Join Date: Sep 2009 Motorcycle(s): '95 DUCATI 900SS/SP '07 DUCATI SS800 '19 HONDA CBR650R Posts: A lot. MOTM - Nov '18, Mar '17	at 18K (with no known history of valve adjustment) I'd consider a check mandatory...then reevaluate results from that point. __________________________________________________ gordon@customcarbservices.com Custom Carb Service www.customcarbservices.com

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