Blown Hawk Engine

Entropy · 06-07-2017, 03:27 AM

So I think my buddy blew the engine while riding at full throttle on the freeway.

Is there a kit to rebuild the top end, or what parts to buy individually? The cheaper the better for him.

pete · 06-07-2017, 03:42 AM

Blowen ?....
is the con rod hanging out a hole in the crank case ?

pull it down and have a lokk before he's spends any money...

..

Ariel Red Hunter · 06-07-2017, 08:48 AM

Quote:

Originally Posted by pete

Blowen ?....
is the con rod hanging out a hole in the crank case ?

pull it down and have a lokk before he's spends any money...

..

We need to know more. What is your definition of "motor blown up"? In other words ---- Pete is one hundred percent right!...ARH

Megadan · 06-07-2017, 01:55 PM

Let's also clear up some confusion right away.

Top End rebuild kit. On most engines, the "Top End" means - valvetrain and cylinder head.

Do you mean that, or do you mean Jug (cylinder) and Piston?

Entropy · 06-07-2017, 08:32 PM

Good questions guys. He hasn't pulled the engine apart yet and gave me very little information other than it stoped running and wouldn't start again and was making weird noises. I'll report back once he's pulled the engine apart.

Ariel Red Hunter · 06-07-2017, 08:58 PM

Quote:

Originally Posted by Entropy

Good questions guys. He hasn't pulled the engine apart yet and gave me very little information other than it stoped running and wouldn't start again and was making weird noises. I'll report back once he's pulled the engine apart.

Good idea. If he ran it wide open with the original jets in the carburetor very far on the freeway, it could have broken a piston or dropped a valve, since you say it was making weird noises...ARH

dpl096 · 06-07-2017, 11:14 PM

Please keep us up to date and if you can please ask your friend for some pics of any internal parts that failed and or are damaged.....

JeremyC · 06-08-2017, 12:46 AM

Quote:

Originally Posted by Ariel Red Hunter

Good idea. If he ran it wide open with the original jets in the carburetor very far on the freeway, it could have broken a piston or dropped a valve, since you say it was making weird noises...ARH

I was thinking burnt valve from not adjusting them or a melted piston from a lean condition at full throttle.

Mudflap · 06-08-2017, 07:23 AM

Could be something like a push rod out of it's socket.

2LZ · 06-08-2017, 10:35 AM

Quote:

Originally Posted by Entropy

......while riding at full throttle on the freeway........

Two important questions: Was it broke in yet? How many miles?

wheelbender6 · 06-08-2017, 07:48 PM

In NASCAR, we say "Blowed a motor". That broad term that can mean anything from simply a broken ring to a hole in the block.

Entropy · 06-09-2017, 12:18 AM

Quote:

Originally Posted by 2LZ

Two important questions: Was it broke in yet? How many miles?

Yes, we broke them in correctly after first changing the oil. Them another oil change...

Bike has around 1000 miles.

BARLOW · 06-12-2017, 01:07 AM

i am going to guess burnt/broken valve or hole in the piston, if it still has factory jets

Entropy · 06-14-2017, 05:54 AM

Quote:

Originally Posted by BARLOW

i am going to guess burnt/broken valve or hole in the piston, if it still has factory jets

Ok, and that is based on the assumption that this bike was ran at sea level or the 5000' feet that it was actually running at?

Ariel Red Hunter · 06-14-2017, 07:27 AM

Quote:

Originally Posted by Entropy

Ok, and that is based on the assumption that this bike was ran at sea level or the 5000' feet that it was actually running at?

No, that lean problem is less pronounced at 5000 feet. I must have missed on of your posts, as this is the first I've heard of 5000 feet...ARH

06-07-2017, 03:27 AM	#1
Entropy Join Date: Feb 2016 Posts: 98	Blown Hawk Engine So I think my buddy blew the engine while riding at full throttle on the freeway. Is there a kit to rebuild the top end, or what parts to buy individually? The cheaper the better for him.
	0

06-07-2017, 03:42 AM	#2
pete Join Date: Jan 2012 Location: ChCh , NZ Posts: 2,261	Blowen ?.... is the con rod hanging out a hole in the crank case ? pull it down and have a lokk before he's spends any money... .. __________________ 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
	1

06-07-2017, 01:55 PM	#4
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 7,982	Let's also clear up some confusion right away. Top End rebuild kit. On most engines, the "Top End" means - valvetrain and cylinder head. Do you mean that, or do you mean Jug (cylinder) and Piston? __________________ 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
	2

06-07-2017, 11:14 PM	#7
dpl096 Join Date: Sep 2015 Location: East Central Hellinois Posts: 1,344	Please keep us up to date and if you can please ask your friend for some pics of any internal parts that failed and or are damaged..... __________________ ************************************************ * " Time you enjoy wasting, is not wasted." - John Lennon “I predict future happiness for Americans, if they can prevent the government from wasting the labors of the people under the pretense of taking care of them.” ― Thomas Jefferson "If you don't know where you're going any road will take you there" ....George Harrison song
	0

06-08-2017, 07:48 PM	#11
wheelbender6 Join Date: May 2015 Location: Houston area Posts: 1,902	In NASCAR, we say "Blowed a motor". That broad term that can mean anything from simply a broken ring to a hole in the block. __________________ "Its not WHAT you ride; its THAT you ride"
	2

06-07-2017, 08:32 PM	#5
Entropy Join Date: Feb 2016 Posts: 98	Good questions guys. He hasn't pulled the engine apart yet and gave me very little information other than it stoped running and wouldn't start again and was making weird noises. I'll report back once he's pulled the engine apart.
	0

06-08-2017, 07:23 AM	#9
Mudflap Join Date: Sep 2014 Posts: 1,870	Could be something like a push rod out of it's socket.
	2

06-12-2017, 01:07 AM	#13
BARLOW Join Date: Jan 2016 Location: central illinois Posts: 362	i am going to guess burnt/broken valve or hole in the piston, if it still has factory jets
	3