Delayed throttle response

Greyfox · February 23rd, 2012, 05:23 AM

I'm experiencing delayed throttle response on my 2011 Ninja 250R. What normally causes this? what do I need to check or fix?

The bike is in neutral and is idling at 1,500 RPM. I twist the throttle suddenly halfway and the engine revs up delayed about 1.5 sec.

Also I've notice that the RPM goes down slower than normal and hangs a bit more near 2000 RPM then goes down to idle speed.

Any tips from you guys?

Thanks in advance

Alex · February 23rd, 2012, 05:46 AM

Do you have the carbed or FI version of the bike? Is this after it is warmed up for a little while, or immediately after you start it?

Greyfox · February 23rd, 2012, 06:04 AM

Quote:

Originally Posted by Alex

Do you have the carbed or FI version of the bike? Is this after it is warmed up for a little while, or immediately after you start it?

I have the J version the carb type. The bike is properly warmed up already.

Gorilla25 · February 23rd, 2012, 06:32 AM

Quote:

Originally Posted by Greyfox

I have the J version the carb type. The bike is properly warmed up already.

There ya go. its not FI, so the response is not as quick as FI is.

EDIT: this was taken from another thread: Throttle lag

Quote:

Originally Posted by Alex

Whacking on the throttle sometimes causes a bog in carbed engines. If you roll on rather than slam it on, it might limit the lag.

EDIT2: do you have any intake/exhaust mods?

Greyfox · February 23rd, 2012, 07:05 AM

I see, so the lag is normal on the carb type.

No I don't have any mods on the intake but my exhaust system is Leo Vince.

The slow RPM return may be caused by poor carb balancing? I haven't had my bike carb synced since I bought it 8 months ago. I never adjusted the intake and exhaust valves either. My ODO reading is around 15k+

Gorilla25 · February 23rd, 2012, 07:35 AM

So, you have a slip-on. Did you shim the needles or get a rejet? If not, you should. It will cut on throttle lag and fill in the rpm flat spots. Though you will still have some kind of throttle lag because of the carbs

February 23rd, 2012, 05:23 AM	#1
Greyfox ninjette.org member Name: Warren Location: Asia Join Date: Dec 2011 Motorcycle(s): 2011 Kawasaki Ninja 250R Posts: 23	Delayed throttle response I'm experiencing delayed throttle response on my 2011 Ninja 250R. What normally causes this? what do I need to check or fix? The bike is in neutral and is idling at 1,500 RPM. I twist the throttle suddenly halfway and the engine revs up delayed about 1.5 sec. Also I've notice that the RPM goes down slower than normal and hangs a bit more near 2000 RPM then goes down to idle speed. Any tips from you guys? Thanks in advance

February 23rd, 2012, 05:46 AM	#2
Alex ninjette.org dude Name: 1 guess :-) Location: SF Bay Area Join Date: Jun 2008 Motorcycle(s): '13 Ninja 300 (white, the fastest color!), '13 R1200RT, '14 CRF250L, '12 TT-R125LE Posts: Too much. Blog Entries: 7	Do you have the carbed or FI version of the bike? Is this after it is warmed up for a little while, or immediately after you start it? __________________________________________________ Montgomery Street Motorcycle Club / cal24.com / crf250l.org / ninjette.org ninjette.org Terms of Service Shopping for motorcycle parts or equipment? Come here first. The friendliest Ninja 250R/300/400 forum on the internet! (especially Unregistered)

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February 23rd, 2012, 07:05 AM	#5
Greyfox ninjette.org member Name: Warren Location: Asia Join Date: Dec 2011 Motorcycle(s): 2011 Kawasaki Ninja 250R Posts: 23	I see, so the lag is normal on the carb type. No I don't have any mods on the intake but my exhaust system is Leo Vince. The slow RPM return may be caused by poor carb balancing? I haven't had my bike carb synced since I bought it 8 months ago. I never adjusted the intake and exhaust valves either. My ODO reading is around 15k+

February 23rd, 2012, 07:35 AM	#6
Gorilla25 Dakine... Name: AJ Location: DFW Join Date: Jun 2011 Motorcycle(s): 2009 Ninja 250R (Sold) \| 636 (hopefully soon) Posts: A lot. Blog Entries: 5	So, you have a slip-on. Did you shim the needles or get a rejet? If not, you should. It will cut on throttle lag and fill in the rpm flat spots. Though you will still have some kind of throttle lag because of the carbs