04 650 Snapped Valve Spring

W

Whos-a-berg

Joined Oct 2004

22 Posts | 0+

White Cliffs, Australia

Discussion Starter
• Nov 3, 2004

• #1

Managed to snap the bottom off of the exhaust valve spring. Have any of you guys heard of this happening before? I couldn't get any warranty on it because they reckon I've overreved it, which I didn't but anyway that's what I thought a rev limiter was for?

Luckily the valve didn't drop, even after tow starting and riding another 60kms home. Had a drag with a XR650R on the way back and still managed to hit 172kph even with the valve flopping all over the show.

 

JoeUSA

Joined Jun 2001

1K Posts | 0+

Pasadena Ca.

• Nov 3, 2004

• #2

You are really lucky. I broke a valve spring on my 2000 'FE501E. It broke in 2 places near the bottom, like yours. I was putting along at about 3000 rpm, and the engine just stopped. I clutched it . I pushed the bike 1.4 miles, to a power line access road, and then walked another 4.5 miles or so to a spot where my wife could reach in her SUV.

I did the tear down/reassembly, and it still cost me over $600US for the parts and head work. They had to replace a guide and the seat. I replaced the stem seals, all valve springs, the spring retainer,keepers and the valve that got bent a little by the piston.

How many hours did your Berg have on it? Mine had 347.4 hours.

Joe

 

T

t-jet-tim

Joined Jan 2004

695 Posts | 0+

USA

• Nov 3, 2004

• #3

Warranty?

 

M

mikst

Joined Sep 2002

323 Posts | 3+

Sweden

• Nov 3, 2004

• #4

From my earlier post:

Hi,

Last week when I visited my dealer there were three -04 650 Supermotard bikes with broken valve springs. They crack in the lower part but luckily, for these guys, the valve didn't damaged the cylinder.
Seems to be a design or quality problem...

One of these bikes had broken the springs two or three times.
This dealer considered it as a quality problem.

 

W

Whos-a-berg

Joined Oct 2004

22 Posts | 0+

White Cliffs, Australia

Discussion Starter
• Nov 4, 2004

• #5

The things an ex-demo bike that's been in the shop for about 10 months so no doubt it's had the bejesus flogged out of it. It never had the speedo on it while it was in the shop so I don't know how many Kms it's done all up, but I've put only about 10hrs and 650kms on it and that has just about been all highway cruising.

Anyone got any ideas on how I could stop it from happening again?, maybe a less aggressive cam profile?

 

M

mikst

Joined Sep 2002

323 Posts | 3+

Sweden

• Nov 4, 2004

• #6

Seems to be a question to Dale. He has written something about the springs before.

 

LINEAWEAVER

Joined Jul 2001

3K Posts | 1+

El Sobrante, Ca. 94803

• Nov 5, 2004

• #7

04 Valve springs (all displacements) are of the same design as that of earlier Husaberg conical springs, however, said springs do appear to be supplied by a different manufacturer as the surface finish has changed. Rates are the same as earlier models.

Since all reports of broken springs have been that of the 04 650 I suspect the new camshaft is further taxing the valvetrain. I shall look into it a bit deeper when time allows.

Best Regards,
Dale

 

M

mikst

Joined Sep 2002

323 Posts | 3+

Sweden

• Nov 6, 2004

• #8

Does anyone know the name of the manufacture/earlier manufacture?

// Mikael

 

LINEAWEAVER

Joined Jul 2001

3K Posts | 1+

El Sobrante, Ca. 94803

• Nov 10, 2004

• #9

Broken Springs

Dale

 

G

Grok

Joined Jun 2001

590 Posts | 0+

Victoria Canada

• Nov 18, 2004

• #10

Re: Broken Springs

LINEAWEAVER said:

Dale

Click to expand...

I've fixed worse! :tongue3:

 

4

44014

Joined May 2004

303 Posts | 2+

BRISBANE

• Nov 19, 2004

• #11

So the 2 and 3 piece valve spring these are a performance valve spring dale.. where do i get some :greenjumpers:

cheers doug

 

S

SideshowBob

Joined Feb 2004

27 Posts | 0+

UK

• Dec 1, 2004

• #12

Do Husabergs actually have rev limiters then???

:? :? :? :? :? :?

If my 03 501 does, then I've never hit it yet!!!

 

4

44014

Joined May 2004

303 Posts | 2+

BRISBANE

• Dec 1, 2004

• #13

my 99 600 does have had it bouncing of it many a times when i thought i was going to eat dirt after coming off a jump wrong .I would amagine the newer ones would aswell

cheers doug