Hawk stalls when cold

Ac21 · 11-16-2018, 10:01 PM

Recently I've been having this problem, when I first start my Hawk it idles fine then suddenly it stalls and makes a strange noise.

Please listen to it stall and tell me what you think.

I tired regapping plug.

Sochin · 11-16-2018, 11:42 PM

Have you ever adjusted the valves?

pete · 11-17-2018, 02:41 AM

the noise sounds like the starter clutch..

dose it stall when it is hot also...

is it not comeing into winter over there...
Has the temps got much colder lately where you live..

.

roundhouse · 11-17-2018, 10:28 AM

Mine will do that when it is cold sometimes. I just idle it up a wee bit until it warms up. My prob is in the tuning as I still have the stock carb and have not adjusted it to cold weather.

ben2go · 11-17-2018, 10:38 AM

To lean. Needs a rejet.

Ac21 · 11-17-2018, 11:14 AM

It's been doing this when weather was hot also, and when the engine is warmed up it will not stall.
I've adjusted the valves a few times to spec.
As far as rejet, I need to change out the piolt? I'm out about 2.5 turns on the mix screw.
I have some very small drill bits I'm going to try to drill out the piolt jet. I've already changed out main jet to 110.

Red Hawk · 11-17-2018, 12:19 PM

Quote:

Originally Posted by ben2go

To lean. Needs a rejet.

Ya, what he said.
The pilot jet is too small. Your not on the main till the throttle is open.

Digger · 11-17-2018, 12:44 PM

Yes, on the lean side, have you tried leaving the choke 1/2 on until it is warm?. I'm considering drilling the pilot jet as well. I measured the stock size orfice to be .016 thinking of .018.

Ac21 · 11-17-2018, 01:16 PM

Oh nvm I don't think I have a bit that small. What makuni jet is comparable?
I have same issue with choke on.
What material is the jet made out of? Maybe I can stick a wire through it and slowly enlarge it?

Megadan · 11-17-2018, 03:04 PM

All jetting considerations should be done only on a hot engine. If your are showing signs of lean or rich once warmed up, then consider the jetting. Being 2.5 turns out is a better indicator of maybe needing to go up half a step or a full step.

All of that said, Digger brought up a better point. The half choke position exists for a reason. In sub 50 degree temps I will idle the bike up to a full minute at full choke before going to half choke, where it stays until the engine is up to temp enough where it will idle and run fine without it. The choke is there for more than just starting the bike.

Digger · 11-17-2018, 03:39 PM

You can buy some drill bits on ebay.. 10$ for a set, includes a .018 bit

DualSport · 11-17-2018, 07:28 PM

Quote:

Originally Posted by ben2go

To lean. Needs a rejet.

You mean the pilot jet? That can't be replaced on the PZ30. If the choke half worked the pilot wouldn't matter..

ben2go · 11-18-2018, 10:03 AM

Quote:

Originally Posted by DualSport

You mean the pilot jet? That can't be replaced on the PZ30. If the choke half worked the pilot wouldn't matter..

Yes.

Ac21 · 11-18-2018, 06:42 PM

With chock 1/2 way or full it won't start, choke off is the only way it will somewhat idle.

DualSport · 11-19-2018, 04:36 PM

Quote:

Originally Posted by Ac21

With chock 1/2 way or full it won't start, choke off is the only way it will somewhat idle.

Same here, and that's with the mix screw 1.5 turns out, 0.00285 valves, and a 110 needle jet. You basically have to swap for a VM26 clone to get a proper pilot jet.. I'm just using starting fluid for now..

11-16-2018, 10:01 PM	#1
Ac21 Join Date: Jun 2018 Posts: 54	Hawk stalls when cold Recently I've been having this problem, when I first start my Hawk it idles fine then suddenly it stalls and makes a strange noise. Please listen to it stall and tell me what you think. I tired regapping plug.
	0

11-16-2018, 11:42 PM	#2
Sochin Join Date: Jul 2017 Location: Montucky Posts: 209	Have you ever adjusted the valves? __________________ 1983 Honda Xl600R 2016 Ducati Multistrada 1200S DVT
	0

11-17-2018, 02:41 AM	#3
pete Join Date: Jan 2012 Location: ChCh , NZ Posts: 2,262	the noise sounds like the starter clutch.. dose it stall when it is hot also... is it not comeing into winter over there... Has the temps got much colder lately where you live.. . __________________ 09 XT660R ... 06 TTR250 ... 80 Montesa H6 125 Enduro... 77 Montesa Cota 348 MRR "Malcom Rathnell Replica"... Current resto projects.. 81 Honda CT110... 80 Kawasaki KL250A1... 11 Husaburg TE125 enduro... "sold" along with another 31... Lifan 125 Pitbike.. "stolen" ... KIWI BIKER FORUM...... http://www.kiwibiker.co.nz/forums/content.php All the best offroad rides in NZ... http://www.remotemoto.com/ E-mail... xtpete1@gmail.com
	0

11-17-2018, 03:04 PM	#10
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 8,034	All jetting considerations should be done only on a hot engine. If your are showing signs of lean or rich once warmed up, then consider the jetting. Being 2.5 turns out is a better indicator of maybe needing to go up half a step or a full step. All of that said, Digger brought up a better point. The half choke position exists for a reason. In sub 50 degree temps I will idle the bike up to a full minute at full choke before going to half choke, where it stays until the engine is up to temp enough where it will idle and run fine without it. The choke is there for more than just starting the bike. __________________ Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124
	1

11-17-2018, 10:28 AM	#4
roundhouse Join Date: Sep 2017 Location: N Texas Posts: 706	Mine will do that when it is cold sometimes. I just idle it up a wee bit until it warms up. My prob is in the tuning as I still have the stock carb and have not adjusted it to cold weather.
	0

11-17-2018, 10:38 AM	#5
ben2go Join Date: Jun 2011 Posts: 1,335	To lean. Needs a rejet.
	1

11-17-2018, 11:14 AM	#6
Ac21 Join Date: Jun 2018 Posts: 54	It's been doing this when weather was hot also, and when the engine is warmed up it will not stall. I've adjusted the valves a few times to spec. As far as rejet, I need to change out the piolt? I'm out about 2.5 turns on the mix screw. I have some very small drill bits I'm going to try to drill out the piolt jet. I've already changed out main jet to 110.
	0

11-17-2018, 12:44 PM	#8
Digger Join Date: Jul 2018 Posts: 64	Yes, on the lean side, have you tried leaving the choke 1/2 on until it is warm?. I'm considering drilling the pilot jet as well. I measured the stock size orfice to be .016 thinking of .018.
	0

11-17-2018, 01:16 PM	#9
Ac21 Join Date: Jun 2018 Posts: 54	Oh nvm I don't think I have a bit that small. What makuni jet is comparable? I have same issue with choke on. What material is the jet made out of? Maybe I can stick a wire through it and slowly enlarge it?
	0

11-17-2018, 03:39 PM	#11
Digger Join Date: Jul 2018 Posts: 64	You can buy some drill bits on ebay.. 10$ for a set, includes a .018 bit
	0

11-18-2018, 06:42 PM	#14
Ac21 Join Date: Jun 2018 Posts: 54	With chock 1/2 way or full it won't start, choke off is the only way it will somewhat idle.
	0