Engine bogging down on start

Betlog · January 16th, 2010, 03:35 PM

Hi guys. When I am at low revs (below 4k RPMs), I feel the engine is bogging down. This is most usually the case when I first ride. After about 30 mins or so of driving, then it is not as bad. Sometimes at a stop, the lag is as much as 2-3 seconds. I have 200 miles so far and I do warm it up approximately 2 minutes before riding. Any suggestions?

tapdiggy · January 16th, 2010, 03:53 PM

Hey noob. Was this bogging happening when you bought the bike?

Betlog · January 16th, 2010, 04:06 PM

Quote:

Originally Posted by tapdiggy

Hey noob. Was this bogging happening when you bought the bike?

That is a good question. It might have been. I probably just couldn't feel it then as I am very inexperienced and I was not very smooth. Now that I am getting the hang of it, I am feeling more of the bike's intricacies...

tapdiggy · January 16th, 2010, 04:14 PM

I meant to ask also what year is your bike, and were you the first owner?

Betlog · January 16th, 2010, 04:16 PM

Quote:

Originally Posted by tapdiggy

I meant to ask also what year is your bike, and were you the first owner?

Yes. I got the bike new, it's a 2009.

tapdiggy · January 16th, 2010, 04:21 PM

Is it happening when you start from a stop, or is it when you stop?

tapdiggy · January 16th, 2010, 04:23 PM

Hope you don't mind all the questions. They will lead to more solid advice.

Betlog · January 16th, 2010, 04:23 PM

Quote:

Originally Posted by tapdiggy

Is it happening when you start from a stop, or is it when you stop?

This is most noticeable starting from a stop.

tapdiggy · January 16th, 2010, 04:27 PM

Ok, we may be getting somewhere. Are you giving it a lot of throttle pretty quick or are you applying smooth, steady twist?

Betlog · January 16th, 2010, 04:31 PM

Quote:

Originally Posted by tapdiggy

Ok, we may be getting somewhere. Are you giving it a lot of throttle pretty quick or are you applying smooth, steady twist?

Decent amount of throttle. More so than I used to do when I first got it as I was inexperienced then...

tapdiggy · January 16th, 2010, 04:39 PM

Ya, I was sheepish with the throttle at first also. So are you twisting quickly on it or building it up smoothly? And how are you at letting the clutch engage?

Betlog · January 16th, 2010, 04:42 PM

I let the clutch disengage smoothly. At this point, I am only on the gas but then I notice the engine bogging down, I apply more throttle, but then it just moves at the same rate, then all of a sudden after a second or two, I get a burst of torque.

tapdiggy · January 16th, 2010, 04:47 PM

Ya, I just talked to Plasmatoast. He says their is a deadspot in the low RPMs when the bike is cold. Try warming up longer, with tyhe choke on.

Betlog · January 16th, 2010, 04:51 PM

Truong. Thank you for all your help on this. I'll do that and keep an eye on this and will post again if it becomes a bigger issue. Thanks again bro!

tapdiggy · January 16th, 2010, 05:02 PM

Glad to help. Hope my advice was good.

g21-30 · January 17th, 2010, 09:04 AM

http://www.ninjette.org/forums/showthread.php?t=11963

Racer x · January 17th, 2010, 10:34 AM

+1

tapdiggy · January 17th, 2010, 11:47 AM

Shimming the needles was outside the immediate scope of this troubleshoot. It is rational to improve upon basic technique (ie, longer warm-up period) before simply chalking it up to a supposed shortcoming in the machinery.

g21-30 · January 18th, 2010, 12:33 PM

Quote:

Originally Posted by n00br1d3r

Hi guys. After about 30 mins or so of driving, then it is not as bad.

This is a perfect example of an engine that needs to have the needles shimmed! 30 minutes warmup is totally unacceptable! My bike was the same way and that was with the air temp at 70 degrees! The temp can be in the teens and I can drive away after 2 minutes of warmup.

Plasmatoast · January 18th, 2010, 05:18 PM

when tapdiggy asked me about my bikes I thought he was asking about start up.. definitely need to do something if the bike acts like this for 30 minutes, Shimming the Needles is a good, quick, and relatively inexpensive place to start. Be very careful of the screws on the top of the carbs, and the rubber diaphragms that the needles are in.

Samer · January 18th, 2010, 06:44 PM

Do you turn the choke off before riding it? I haven't done any mods on my bike and I haven't had too much trouble getting it warmed up quickly. I put the choke on and start it, then I gradually reduce choke to keep the RPM at about 2500, once it is settled with the choke at about half way (maybe 5 minutes), I start riding the bike and as it is moving I turn off the choke as I'm applying throttle. This works fine for me.

Chubbs032 · January 18th, 2010, 07:04 PM

Shim the needles and desnorkle, it's a night and day difference.

January 16th, 2010, 03:35 PM	#1
Betlog ninjette.org guru Name: Dude!! Location: Southern California Join Date: Dec 2009 Motorcycle(s): 2009 250r Posts: 443	Engine bogging down on start Hi guys. When I am at low revs (below 4k RPMs), I feel the engine is bogging down. This is most usually the case when I first ride. After about 30 mins or so of driving, then it is not as bad. Sometimes at a stop, the lag is as much as 2-3 seconds. I have 200 miles so far and I do warm it up approximately 2 minutes before riding. Any suggestions?

January 16th, 2010, 03:53 PM	#2
tapdiggy Humble Observer Name: Truong Location: Augusta, Maine Join Date: Mar 2009 Motorcycle(s): 2009 Yamaha XT250 Posts: 612	Hey noob. Was this bogging happening when you bought the bike? __________________________________________________ Everything I post is "IN MY HONEST OPINION". Why is "Parking Lot Enduro" not a thing?

January 16th, 2010, 04:14 PM	#4
tapdiggy Humble Observer Name: Truong Location: Augusta, Maine Join Date: Mar 2009 Motorcycle(s): 2009 Yamaha XT250 Posts: 612	I meant to ask also what year is your bike, and were you the first owner? __________________________________________________ Everything I post is "IN MY HONEST OPINION". Why is "Parking Lot Enduro" not a thing?

January 16th, 2010, 04:21 PM	#6
tapdiggy Humble Observer Name: Truong Location: Augusta, Maine Join Date: Mar 2009 Motorcycle(s): 2009 Yamaha XT250 Posts: 612	Is it happening when you start from a stop, or is it when you stop? __________________________________________________ Everything I post is "IN MY HONEST OPINION". Why is "Parking Lot Enduro" not a thing?

January 16th, 2010, 04:23 PM	#7
tapdiggy Humble Observer Name: Truong Location: Augusta, Maine Join Date: Mar 2009 Motorcycle(s): 2009 Yamaha XT250 Posts: 612	Hope you don't mind all the questions. They will lead to more solid advice. __________________________________________________ Everything I post is "IN MY HONEST OPINION". Why is "Parking Lot Enduro" not a thing?

January 16th, 2010, 04:27 PM	#9
tapdiggy Humble Observer Name: Truong Location: Augusta, Maine Join Date: Mar 2009 Motorcycle(s): 2009 Yamaha XT250 Posts: 612	Ok, we may be getting somewhere. Are you giving it a lot of throttle pretty quick or are you applying smooth, steady twist? __________________________________________________ Everything I post is "IN MY HONEST OPINION". Why is "Parking Lot Enduro" not a thing?

January 16th, 2010, 04:39 PM	#11
tapdiggy Humble Observer Name: Truong Location: Augusta, Maine Join Date: Mar 2009 Motorcycle(s): 2009 Yamaha XT250 Posts: 612	Ya, I was sheepish with the throttle at first also. So are you twisting quickly on it or building it up smoothly? And how are you at letting the clutch engage? __________________________________________________ Everything I post is "IN MY HONEST OPINION". Why is "Parking Lot Enduro" not a thing?

January 16th, 2010, 04:42 PM	#12
Betlog ninjette.org guru Name: Dude!! Location: Southern California Join Date: Dec 2009 Motorcycle(s): 2009 250r Posts: 443	I let the clutch disengage smoothly. At this point, I am only on the gas but then I notice the engine bogging down, I apply more throttle, but then it just moves at the same rate, then all of a sudden after a second or two, I get a burst of torque.

January 16th, 2010, 04:47 PM	#13
tapdiggy Humble Observer Name: Truong Location: Augusta, Maine Join Date: Mar 2009 Motorcycle(s): 2009 Yamaha XT250 Posts: 612	Ya, I just talked to Plasmatoast. He says their is a deadspot in the low RPMs when the bike is cold. Try warming up longer, with tyhe choke on. __________________________________________________ Everything I post is "IN MY HONEST OPINION". Why is "Parking Lot Enduro" not a thing?

January 16th, 2010, 04:51 PM	#14
Betlog ninjette.org guru Name: Dude!! Location: Southern California Join Date: Dec 2009 Motorcycle(s): 2009 250r Posts: 443	Truong. Thank you for all your help on this. I'll do that and keep an eye on this and will post again if it becomes a bigger issue. Thanks again bro!

January 16th, 2010, 05:02 PM	#15
tapdiggy Humble Observer Name: Truong Location: Augusta, Maine Join Date: Mar 2009 Motorcycle(s): 2009 Yamaha XT250 Posts: 612	Glad to help. Hope my advice was good. __________________________________________________ Everything I post is "IN MY HONEST OPINION". Why is "Parking Lot Enduro" not a thing?

January 17th, 2010, 09:04 AM	#16
g21-30 ninjette.org certified postwhore Name: Sam Location: Northern Virginia Join Date: Nov 2008 Motorcycle(s): Ninja 250R 2009 Posts: A lot.	Can't believe no one mentioned this! http://www.ninjette.org/forums/showthread.php?t=11963

January 17th, 2010, 10:34 AM	#17
Racer x ninjette.org certified postwhore Name: Eric Location: Iowa City Join Date: May 2009 Motorcycle(s): 2008 Kawmeracchi 350 2010 Project X Posts: A lot. Blog Entries: 54 MOTM - Sep '18, Feb '16	+1

January 17th, 2010, 11:47 AM	#18
tapdiggy Humble Observer Name: Truong Location: Augusta, Maine Join Date: Mar 2009 Motorcycle(s): 2009 Yamaha XT250 Posts: 612	Shimming the needles was outside the immediate scope of this troubleshoot. It is rational to improve upon basic technique (ie, longer warm-up period) before simply chalking it up to a supposed shortcoming in the machinery. __________________________________________________ Everything I post is "IN MY HONEST OPINION". Why is "Parking Lot Enduro" not a thing?

January 18th, 2010, 05:18 PM	#20
Plasmatoast ninjette.org member Name: Ryan Location: Augusta Me Join Date: Dec 2008 Motorcycle(s): 09 250R - 08 250R - 03 250EX - 86 KLR 250 Posts: 60	when tapdiggy asked me about my bikes I thought he was asking about start up.. definitely need to do something if the bike acts like this for 30 minutes, Shimming the Needles is a good, quick, and relatively inexpensive place to start. Be very careful of the screws on the top of the carbs, and the rubber diaphragms that the needles are in.

January 18th, 2010, 06:44 PM	#21
Samer ninjette.org guru Name: Samer Location: Jupiter, Florida Join Date: Sep 2009 Motorcycle(s): 09 Ninja 250R SE Posts: 376	Do you turn the choke off before riding it? I haven't done any mods on my bike and I haven't had too much trouble getting it warmed up quickly. I put the choke on and start it, then I gradually reduce choke to keep the RPM at about 2500, once it is settled with the choke at about half way (maybe 5 minutes), I start riding the bike and as it is moving I turn off the choke as I'm applying throttle. This works fine for me.

January 18th, 2010, 07:04 PM	#22
Chubbs032 ninjette.org member Name: Chris Location: LA Join Date: Dec 2009 Motorcycle(s): 250r Posts: 199	Shim the needles and desnorkle, it's a night and day difference.

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