Stripped bolt in head

Angus67 · 02-04-2018, 08:18 PM

With all the screwing(err...bolting), i stripped the bolt for the intake manifold. So now i have to pull the engine to get a straight shot with a drill for a helicoil. Its a m8, correct?

rjmorel · 02-05-2018, 12:15 AM

Would make it a lot easier to work on it. Unless you can sneak a helicoil tap up in there and have room to turn it. Then install the helicoil. rj

Angus67 · 02-05-2018, 08:51 AM

Yeah. Gonna move as much stuff out of the way to see if i can sneek tools up in there. Its the lower of the two bolts, so fingers crossed.

Mudflap · 02-05-2018, 02:09 PM

Can you just pull the head off and leave the engine in place?

Megadan · 02-05-2018, 02:09 PM

I know my head uses an M6x1.0 thread on the intake side. I would recommend taking the good bolt and sizing it up to make sure of the size you need.

Angus67 · 02-05-2018, 09:57 PM

Engine is out. Tomorrow, helicoil

Angus67 · 02-05-2018, 10:00 PM

I already had a m6 kit from a previous po’’s screw up

Angus67 · 02-07-2018, 10:50 PM

Pressure washed the engine and roller while apart, and helicoil the stripped hole. With the help of a friend, adam, we got the motor back in the frame.
I took the opportunity to take the back wheel off and check the conditions of the swingarm bushins. A ton of play, and looks like the rubber bushings in the shock eyes are shot. The shock bushes are easy, but were to get new swingarm bushes? And if the swingarm is wallowed out, what to do?

Ariel Red Hunter · 02-08-2018, 10:43 AM

Quote:

Originally Posted by Angus67

Pressure washed the engine and roller while apart, and helicoil the stripped hole. With the help of a friend, adam, we got the motor back in the frame.
I took the opportunity to take the back wheel off and check the conditions of the swingarm bushins. A ton of play, and looks like the rubber bushings in the shock eyes are shot. The shock bushes are easy, but were to get new swingarm bushes? And if the swingarm is wallowed out, what to do?

Got a little work to do on that swing arm, sounds like. It is unlikely that the swng arm is wallowed out, because that rubber bushing is vulkanised between two thin steel tubes. The outer part of the bushing assembly is pressed into the swingarm, and the inner part is a slip fit on the swingarm spindle. The easy fix is to replace the entire bushing with a bronze bushing, one each side. If you go this route, install a grease zerk in the middle of the swing arm cross piece, and a thin steel tube between the bushes. The steel tube keeps the bushings from creeping in AND directs the grease to the bushings...ARH

Angus67 · 02-08-2018, 11:54 AM

Thanks arh. Grease zerk is already installed

Weldangrind · 02-13-2018, 12:28 PM

I once took a quad swingarm bushing to the local Yamaha dealer and asked him to try and match it. Since he keeps all of the bushings in the same box, he brought the whole box over to the counter. The match was from a PW80 dirt bike; it was much better quality and cost about $8.00 at the time. I promptly shared the part number on this forum and several members bought the same part. It has held up remarkably well.

Maybe you could try something like that, assuming you can extract the existing bushing without destroying it. Alternatively, you could have bushings turned from UHMW, if you know someone with a lathe.

02-04-2018, 08:18 PM	#1
Angus67 Join Date: Oct 2017 Location: shelton, Washington Posts: 167	Stripped bolt in head With all the screwing(err...bolting), i stripped the bolt for the intake manifold. So now i have to pull the engine to get a straight shot with a drill for a helicoil. Its a m8, correct? __________________ 2006 roketa 200cc 1971 Yamaha xs650 2x 1980 xs650, 1 is a café, other is a chopper/brat 1972 Honda xl250 2x early 90's Honda rf600 parts bikes more mc junk laying around.
	0

02-05-2018, 12:15 AM	#2
rjmorel Join Date: May 2007 Location: Warshington Posts: 928	Would make it a lot easier to work on it. Unless you can sneak a helicoil tap up in there and have room to turn it. Then install the helicoil. rj __________________ Live Zong, and Prosper
	0

02-05-2018, 08:51 AM	#3
Angus67 Join Date: Oct 2017 Location: shelton, Washington Posts: 167	Yeah. Gonna move as much stuff out of the way to see if i can sneek tools up in there. Its the lower of the two bolts, so fingers crossed. __________________ 2006 roketa 200cc 1971 Yamaha xs650 2x 1980 xs650, 1 is a café, other is a chopper/brat 1972 Honda xl250 2x early 90's Honda rf600 parts bikes more mc junk laying around.
	0

02-05-2018, 02:09 PM	#5
Megadan Join Date: Apr 2017 Location: Omaha, NE Posts: 7,990	I know my head uses an M6x1.0 thread on the intake side. I would recommend taking the good bolt and sizing it up to make sure of the size you need. __________________ 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
	0

02-05-2018, 10:00 PM	#7
Angus67 Join Date: Oct 2017 Location: shelton, Washington Posts: 167	I already had a m6 kit from a previous po’’s screw up __________________ 2006 roketa 200cc 1971 Yamaha xs650 2x 1980 xs650, 1 is a café, other is a chopper/brat 1972 Honda xl250 2x early 90's Honda rf600 parts bikes more mc junk laying around.
	0

02-05-2018, 02:09 PM	#4
Mudflap Join Date: Sep 2014 Posts: 1,870	Can you just pull the head off and leave the engine in place?
	0

02-07-2018, 10:50 PM	#8
Angus67 Join Date: Oct 2017 Location: shelton, Washington Posts: 167	Pressure washed the engine and roller while apart, and helicoil the stripped hole. With the help of a friend, adam, we got the motor back in the frame. I took the opportunity to take the back wheel off and check the conditions of the swingarm bushins. A ton of play, and looks like the rubber bushings in the shock eyes are shot. The shock bushes are easy, but were to get new swingarm bushes? And if the swingarm is wallowed out, what to do? __________________ 2006 roketa 200cc 1971 Yamaha xs650 2x 1980 xs650, 1 is a café, other is a chopper/brat 1972 Honda xl250 2x early 90's Honda rf600 parts bikes more mc junk laying around.
	0

02-08-2018, 11:54 AM	#10
Angus67 Join Date: Oct 2017 Location: shelton, Washington Posts: 167	Thanks arh. Grease zerk is already installed __________________ 2006 roketa 200cc 1971 Yamaha xs650 2x 1980 xs650, 1 is a café, other is a chopper/brat 1972 Honda xl250 2x early 90's Honda rf600 parts bikes more mc junk laying around.
	0

02-13-2018, 12:28 PM	#11
Weldangrind Join Date: Mar 2009 Location: Sardis, BC, Canada Posts: 25,977	I once took a quad swingarm bushing to the local Yamaha dealer and asked him to try and match it. Since he keeps all of the bushings in the same box, he brought the whole box over to the counter. The match was from a PW80 dirt bike; it was much better quality and cost about $8.00 at the time. I promptly shared the part number on this forum and several members bought the same part. It has held up remarkably well. Maybe you could try something like that, assuming you can extract the existing bushing without destroying it. Alternatively, you could have bushings turned from UHMW, if you know someone with a lathe. __________________ Weldangrind "I figure I'm well-prepared for coping with a bike that comes from the factory with unresolved issues and that rewards the self-reliant owner." - Buccaneer
	0