03 650S Cylinder Head - SV650.org

03-09-06, 05:31 PM

I need to repair the front cylinder on my 650s, and need to know if the cylinder head is cast aluminium or steel?

The reason is one of the exhaust bolts sheared and I have been unsuccesful with stud extractors, mole grips and anything else to remove. As a temp repair, I used a drilled into the old bolt shank and used chemical metal to hold a length of thread bar then fitted the exhaust. The chemical has disintegrated over 2/3 months and I need somehting more permanent. I can't afford to have the head removed and repaired so I am planning to weld the thread bar in place.

I have tried a magnet on the head, but get a weak pull compare dto say the tank or rear subframe.

Any help or other suggestions gratefully received!!!

03-09-06, 09:31 PM

alloy isnt it.

northwind · 04-09-06, 10:53 AM

I reckon so. Not heavy enough to be all steel, anyways... The magnet pull might be from something in the alloy, or it could even be teh internals if your magnet#s strong enough.

TSM · 04-09-06, 11:12 AM

The magnets are prolly being attracted to the cylinder liners.

What happens when you use the stud extractors?

03-09-06, 05:31 PM	#1
metallica155 Guest Posts: n/a	03 650S Cylinder Head I need to repair the front cylinder on my 650s, and need to know if the cylinder head is cast aluminium or steel? The reason is one of the exhaust bolts sheared and I have been unsuccesful with stud extractors, mole grips and anything else to remove. As a temp repair, I used a drilled into the old bolt shank and used chemical metal to hold a length of thread bar then fitted the exhaust. The chemical has disintegrated over 2/3 months and I need somehting more permanent. I can't afford to have the head removed and repaired so I am planning to weld the thread bar in place. I have tried a magnet on the head, but get a weak pull compare dto say the tank or rear subframe. Any help or other suggestions gratefully received!!!

04-09-06, 10:53 AM	#3
northwind Moderator Mega Poster Join Date: Jan 2004 Location: In the garage where I belong Posts: 17,082	I reckon so. Not heavy enough to be all steel, anyways... The magnet pull might be from something in the alloy, or it could even be teh internals if your magnet#s strong enough. __________________ "We are the angry mob, we read the papers every day We like what we like, we hate what we hate But we're oh so easily swayed"

04-09-06, 11:12 AM	#4
TSM The Sick Man Mega Poster Join Date: Nov 2004 Location: Peckham.SE.LDN Posts: 4,768	The magnets are prolly being attracted to the cylinder liners. What happens when you use the stud extractors? __________________ OTR: KTM 690 Duke R 2015 Full Akro SIDELINE: Kwak ZX636 A1P 2002, Red, R&G's, Yoshi, Double Bubble Screen GONE: Kwak ZX-7R P1, Full Akro, Undertray, Screen GONE: SV650S K2 Very Bruised & Without Fairing, Motovation Frame Sliders, R&G Ally Sprocket Toe Protector, HEL 2 Line Setup, GSXR K1 600 RWU Forks, Barnett Clutch & Springs, Penske 8981 Shock, Gilles Ti Rearsets, Steel Barends, Scottoiler, AFAM Chain & Sprockets, Twin FIAMM Horns, Skidmarx Bellypan, Full Micron Zeta Steel System, Cut down undertay. Forum Problems & Information / Site Suggestions

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03-09-06, 09:31 PM	#2
kwak zzr Guest Posts: n/a	alloy isnt it.