Hawk - Stock Carb

faulknja · 04-10-2016, 09:03 PM

so, I've put about 600 miles on my Hawk and the whole time, top speed (even with the 17 tooth front sprocket mod) was around 52. Just realized today that the choke was in the middle position the whole time. DOH! I closed the choke and bam, 58mph on my GPS. Awesome, considering that I'm 6'4" tall and weigh 340!

Only issue is that around half throttle there is a bit of surge / sputter. Crank the throttle just a bit more and it goes away, accelerates strongly. I checked and found no air leaks. Any ideas... not sure that I want to take on the mod with the Mikuni after reading posts here about the trouble getting them dialed in.

Ichrisbot · 04-10-2016, 09:12 PM

The stock carb is so lean that it was nearly jetted right for me in Colorado at around 6,100 feet above sea level. Even so, I switched to the mikuni and it gave me a very noticeable boost in power after getting it set. All I ended up doing was bumping the needle the next clip down.
I think if you're at lower elevation you'll find it's even more worth it, although you can always slot those tamper proof screws and try rejetting the stock one for cheaper.

faulknja · 04-10-2016, 09:15 PM

I'm in Florida, so, elevation is near zero. Maybe I'll have to get someone to help swap out the carb for the Mikuni.

paulesmann · 04-10-2016, 09:35 PM

Faulk that's insane you rode 600 miles with the choke at middle setting!! I'm having some of the same problems with my carb. If you find a good, thorough carb tweak tutorial for the hawk let me know!

Entropy · 04-11-2016, 01:44 AM

Quote:

Originally Posted by Ichrisbot

The stock carb is so lean that it was nearly jetted right for me in Colorado at around 6,100 feet above sea level. Even so, I switched to the mikuni and it gave me a very noticeable boost in power after getting it set. All I ended up doing was bumping the needle the next clip down.
I think if you're at lower elevation you'll find it's even more worth it, although you can always slot those tamper proof screws and try rejetting the stock one for cheaper.

I'm in Utah, about 5000 elevation but in the mountains higher. What jets and needle setting did you use on the Mikuni?

Ichrisbot · 04-11-2016, 09:52 AM

Quote:

Originally Posted by Entropy

I'm in Utah, about 5000 elevation but in the mountains higher. What jets and needle setting did you use on the Mikuni?

I actually left all the jets as is, moved the needle to the 2nd clip down from the top, and adjusted the mixture and idle screws after a couple rides up and down the block until it ran strong and idled reliably. I'm not convinced that it's jetted perfectly, but the bike accelerates so much quicker and with no hiccups in the range of the throttle that I didn't worry about messing with the jets themselves.

faulknja · 04-11-2016, 06:04 PM

Ok, I pulled the trigger and ordered the Mikuni and the 115/30 jets. When they come in, I'll let you know how it goes

traygiddens · 04-11-2016, 07:17 PM

it will go great, put mine on the other day. it's really nicer.
two turns out on the little screw air thingy..

kind of wish it had the big knob for the idle adjustment like the original, but it's dialed in now.

Ichrisbot · 04-11-2016, 09:45 PM

Quote:

Originally Posted by traygiddens

it will go great, put mine on the other day. it's really nicer.
two turns out on the little screw air thingy..

kind of wish it had the big knob for the idle adjustment like the original, but it's dialed in now.

Same here, the finger adjustable knob was nice. Now I actually have to let the bike warm up for a few minutes before it will idle by itself without needing a little bit of throttle.

lee47512 · 04-11-2016, 10:22 PM

You know there is no law stating you can't put the idle adjust screw from your stock carb to you new carb right?lol

mq1991 · 04-11-2016, 10:33 PM

Quote:

Originally Posted by lee47512

You know there is no law stating you can't put the idle adjust screw from your stock carb to you new carb right?lol

Different thread size :/ I was contemplating drilling and tapping the mikuni idle scren and thread a computer thumb screw in with some red loctite.

Adjuster · 04-12-2016, 12:18 AM

They sell the correct idle screw and air/fuel screw thumb versions on Ebay and Amazon.

/

lee47512 · 04-12-2016, 04:21 AM

Quote:

Originally Posted by Adjuster

They sell the correct idle screw and air/fuel screw thumb versions on Ebay and Amazon.

/

Ebay is awesome.

faulknja · 04-12-2016, 10:26 AM

http://www.ebay.com/itm/CNC-Billet-A...lXBAEP&vxp=mtr

Ships from China

mq1991 · 04-12-2016, 11:22 AM

Quote:

Originally Posted by faulknja

http://www.ebay.com/itm/CNC-Billet-A...lXBAEP&vxp=mtr

Ships from China

Do you know where to get the correct idle adjustment screw?

04-10-2016, 09:03 PM	#1
faulknja Join Date: Nov 2015 Posts: 35	Hawk - Stock Carb so, I've put about 600 miles on my Hawk and the whole time, top speed (even with the 17 tooth front sprocket mod) was around 52. Just realized today that the choke was in the middle position the whole time. DOH! I closed the choke and bam, 58mph on my GPS. Awesome, considering that I'm 6'4" tall and weigh 340! Only issue is that around half throttle there is a bit of surge / sputter. Crank the throttle just a bit more and it goes away, accelerates strongly. I checked and found no air leaks. Any ideas... not sure that I want to take on the mod with the Mikuni after reading posts here about the trouble getting them dialed in.
	1

04-10-2016, 09:35 PM	#4
paulesmann Join Date: Jan 2016 Location: Portland, OR Posts: 76	Faulk that's insane you rode 600 miles with the choke at middle setting!! I'm having some of the same problems with my carb. If you find a good, thorough carb tweak tutorial for the hawk let me know! __________________ Paul Mann 2015 Haosen Hawk 1989 Kawasaki EX500 1991 Suzuki DR350 Last edited by paulesmann; 04-11-2016 at 03:29 AM.
	0

04-11-2016, 10:22 PM	#10
lee47512 Join Date: Jun 2014 Location: Bicknell Indiana Posts: 120	You know there is no law stating you can't put the idle adjust screw from your stock carb to you new carb right?lol __________________ Lee 2014 powermax 150. 2015 Hawk 250. Poop happens
	0

04-10-2016, 09:12 PM	#2
Ichrisbot Join Date: Sep 2015 Posts: 108	The stock carb is so lean that it was nearly jetted right for me in Colorado at around 6,100 feet above sea level. Even so, I switched to the mikuni and it gave me a very noticeable boost in power after getting it set. All I ended up doing was bumping the needle the next clip down. I think if you're at lower elevation you'll find it's even more worth it, although you can always slot those tamper proof screws and try rejetting the stock one for cheaper.
	0

04-10-2016, 09:15 PM	#3
faulknja Join Date: Nov 2015 Posts: 35	I'm in Florida, so, elevation is near zero. Maybe I'll have to get someone to help swap out the carb for the Mikuni.
	0

04-11-2016, 06:04 PM	#7
faulknja Join Date: Nov 2015 Posts: 35	Ok, I pulled the trigger and ordered the Mikuni and the 115/30 jets. When they come in, I'll let you know how it goes
	0

04-11-2016, 07:17 PM	#8
traygiddens Join Date: Mar 2016 Location: Houston texas westside Posts: 40	it will go great, put mine on the other day. it's really nicer. two turns out on the little screw air thingy.. kind of wish it had the big knob for the idle adjustment like the original, but it's dialed in now.
	1

04-12-2016, 12:18 AM	#12
Adjuster Join Date: Dec 2014 Location: Deerfield Beach FL Posts: 1,410	They sell the correct idle screw and air/fuel screw thumb versions on Ebay and Amazon. /
	0

04-12-2016, 10:26 AM	#14
faulknja Join Date: Nov 2015 Posts: 35	http://www.ebay.com/itm/CNC-Billet-A...lXBAEP&vxp=mtr Ships from China
	0