Very high revs with choke

diablo250 · May 25th, 2009, 01:01 AM

So after shimming, I started up the bike with the choke. After I got the air out of the gas lines the bike started to idle really high-roughly 4-5k rpm. I turned down the choke to around 2, and then off completely. I turned it back on to see if the problem persisted and it did. Everything runs great, the choke just seems to have a bit more authority now...is this a normal occurrence after shimming?

kkim · May 25th, 2009, 01:12 AM

at what rpm does your bike idle at after it is completely warmed up and the choke is completely turned off?

diablo250 · May 25th, 2009, 09:44 AM

Quote:

Originally Posted by kkim

at what rpm does your bike idle at after it is completely warmed up and the choke is completely turned off?

The bike idles fine without the choke once warmed. It was at almost 2k from the factory, I turned it down to 1250. I just assume since I raised the needles, when the choke is on, there is more fuel flowing through the system, therefore giving me a higher idle. I'll also check the choke cable freeplay.

kkim · May 25th, 2009, 10:16 AM

I think you're okay and that you are correct about the raised needles raising the choke fast idle limit.

however, you don't need to idle at 4-5k and I always try to adjust the choke once the bike is started so it idles at about 2500 during warmup, until the bike can run w/o the choke. It takes a few times adjusting the choke lever during warmup to keep the bike around that 2500 mark.

gizmogamez · May 25th, 2009, 10:40 AM

my bike idles high with full choke as well. I find that if I don't give it at least 5 to 10 min to warm up that my bike can die on me or loose power when I give it gas going from a full stop.
the bike doesn't really idle well if the choke isn't at full and will usually die if lkeft like that for 30 sec or so.

kkim · May 25th, 2009, 10:48 AM

adjust the choke so it idles a bit. it's not an on/off switch... there is some adjustability with the choke lever.

sounds like your bike needs to be shimmed to get rid of that dead spot right off idle.

gizmogamez · May 25th, 2009, 11:31 AM

yea, it only happens if i don't warm up the bike. after 10 min of full choke or riding it doesn't do it. its scary because it give me enough gas to get into an intersection then just dies out when i'm in the middle of it. however if i feel it doing it and I pull the clutch in the bike won't die...
when I first start the bike (depending on outside temp) I usually can't have it at anything other then full or it will put a few times and then die...
It didn't do this the first week I had it, started at about the 500km mark

kkim · May 25th, 2009, 02:48 PM

yes, full choke when you start, but after it has started, to can gradually increment it back so it doesn't rev so high. you can also ride off with the choke on until the engine is warmed up... just don't forget to turn it off after the bike is fully warm.

smcbride11 · May 25th, 2009, 06:40 PM

Quote:

Originally Posted by kkim

adjust the choke so it idles a bit. it's not an on/off switch... there is some adjustability with the choke lever.

I wanted to thank you for this statement, Kelly... Embarrassing though it is, having never driven/ridden a carbed vehicle before, I honestly didn't realize that - saw it in a thread you posted in a month or so ago and it's been a huge help during warmup.

diablo250 · May 25th, 2009, 08:27 PM

Yea, I fixed the idle problem. It turned out that when I re-tightened the diaphragm covers I moved the choke bracket over just a bit. I wiggled the wire and it re-seated itself in the ferrule.

May 25th, 2009, 01:01 AM	#1
diablo250 Crafty Salesman.... Name: Mike Location: Las Anjules(L.A.) Join Date: May 2009 Motorcycle(s): 09 250r, 06 sv650sf Posts: 170	Very high revs with choke So after shimming, I started up the bike with the choke. After I got the air out of the gas lines the bike started to idle really high-roughly 4-5k rpm. I turned down the choke to around 2, and then off completely. I turned it back on to see if the problem persisted and it did. Everything runs great, the choke just seems to have a bit more authority now...is this a normal occurrence after shimming?

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May 25th, 2009, 01:12 AM	#2
kkim Join Date: Nov 2008 Posts: Too much.	at what rpm does your bike idle at after it is completely warmed up and the choke is completely turned off?

May 25th, 2009, 10:16 AM	#4
kkim Join Date: Nov 2008 Posts: Too much.	I think you're okay and that you are correct about the raised needles raising the choke fast idle limit. however, you don't need to idle at 4-5k and I always try to adjust the choke once the bike is started so it idles at about 2500 during warmup, until the bike can run w/o the choke. It takes a few times adjusting the choke lever during warmup to keep the bike around that 2500 mark.

May 25th, 2009, 10:40 AM	#5
gizmogamez ninjette.org member Name: Mike Location: Barrie, Ontario, Canada Join Date: Mar 2009 Motorcycle(s): 2009 Ninja 250R SE Green Posts: 217	my bike idles high with full choke as well. I find that if I don't give it at least 5 to 10 min to warm up that my bike can die on me or loose power when I give it gas going from a full stop. the bike doesn't really idle well if the choke isn't at full and will usually die if lkeft like that for 30 sec or so.

May 25th, 2009, 10:48 AM	#6
kkim Join Date: Nov 2008 Posts: Too much.	adjust the choke so it idles a bit. it's not an on/off switch... there is some adjustability with the choke lever. sounds like your bike needs to be shimmed to get rid of that dead spot right off idle.

May 25th, 2009, 11:31 AM	#7
gizmogamez ninjette.org member Name: Mike Location: Barrie, Ontario, Canada Join Date: Mar 2009 Motorcycle(s): 2009 Ninja 250R SE Green Posts: 217	yea, it only happens if i don't warm up the bike. after 10 min of full choke or riding it doesn't do it. its scary because it give me enough gas to get into an intersection then just dies out when i'm in the middle of it. however if i feel it doing it and I pull the clutch in the bike won't die... when I first start the bike (depending on outside temp) I usually can't have it at anything other then full or it will put a few times and then die... It didn't do this the first week I had it, started at about the 500km mark

May 25th, 2009, 02:48 PM	#8
kkim Join Date: Nov 2008 Posts: Too much.	yes, full choke when you start, but after it has started, to can gradually increment it back so it doesn't rev so high. you can also ride off with the choke on until the engine is warmed up... just don't forget to turn it off after the bike is fully warm.

May 25th, 2009, 08:27 PM	#10
diablo250 Crafty Salesman.... Name: Mike Location: Las Anjules(L.A.) Join Date: May 2009 Motorcycle(s): 09 250r, 06 sv650sf Posts: 170	Yea, I fixed the idle problem. It turned out that when I re-tightened the diaphragm covers I moved the choke bracket over just a bit. I wiggled the wire and it re-seated itself in the ferrule.