Something broke inside engine

G

grillbritt

Joined Jul 2008

52 Posts | 0+

Sweden

Discussion Starter
• May 18, 2009

• #1

This day wasn't my best husaberg day.

The bike has about 190 hours on it and I have always changed oil and checked valves every 15 hours. I replaced the camchain and tensioner 10 hours ago. The previous owner did some major service 90 hours ago...

Ok, enough with the background. I'm not sure but I think it has started to tick more and more lately. And today it behaved very strange. Sometimes at low revs it did shut the ignition off, but turned it back on with a snap on the the "throttle".

In the middle of an uphill it suddenly started to sound CHAKA CHAKA CHAKA CHAKA!!! I immediately killed the engine and pushed it 5 km home.

What do you experts think? Where to start looking? Rocker arms? Camchaft? Crank?
I'm completely lost and sad... :cry:

 

berger

Joined Apr 2002

3K Posts | 11+

Phoenix Arizona

• May 18, 2009

• #2

Come on now!!! A little investigation please!!
Whats the oil ,filter and screen look like.
Maybe pull the main clutch cover and have a look.

 

husabutt

Joined Feb 2003

3K Posts | 384+

Escondido, Ca. USA

• May 18, 2009

• #3

Sounds indicative of a broken valve spring.

 

G

grillbritt

Joined Jul 2008

52 Posts | 0+

Sweden

Discussion Starter
• May 18, 2009

• #4

I will start the investigation tomorrow I think.
I thought of the valve spring too, but last time one broke I didn't have that realy scary noise.

Do you think it's time to replace all the bearing aswell? That's part of the 200 hr servive isn't it?

 

E

ElSnorro

Joined Aug 2007

470 Posts | 13+

The Netherlands

• May 18, 2009

• #5

Pull the rocker cover off for a top-end inspection, it's an easy job and most probably there's the problem

 

K

klaas

Joined Mar 2009

22 Posts | 0+

Netherlands

• May 18, 2009

• #6

ElSnorro said:

Pull the rocker cover off for a top-end inspection, it's an easy job and most probably there's the problem

Click to expand...

snor,
ik heb iets vergelijkbaars gehad.
was een gebroken klep veer. heb ze allemaal vervangen door taffy's dual kit

bijkomend probleem is altijd afwachten. maar valt vaak tegen als een klep de zuiger heeft geraakt

bij mij was een zuigerveer gebroken en er bleek ook achterstallig onderhoud na 75 uur:
1300 euries revisie: hoofdlagers uiteraard, maar wat ook vaak stuk schijnt te gaan is
de balansas(-lager)

haal de 2 klepdekseltjes eraf en met een lampje zie de status van de veren.
de olieplug magneet en filter (2) vertelt ook veel...

suc6!

klaas
NL

 

E

ElSnorro

Joined Aug 2007

470 Posts | 13+

The Netherlands

• May 18, 2009

• #7

klaas said:

ElSnorro said:

Pull the rocker cover off for a top-end inspection, it's an easy job and most probably there's the problem

Click to expand...

snor,
ik heb iets vergelijkbaars gehad.
was een gebroken klep veer. heb ze allemaal vervangen door taffy's dual kit

bijkomend probleem is altijd afwachten. maar valt vaak tegen als een klep de zuiger heeft geraakt

bij mij was een zuigerveer gebroken en er bleek ook achterstallig onderhoud na 75 uur:
1300 euries revisie: hoofdlagers uiteraard, maar wat ook vaak stuk schijnt te gaan is
de balansas(-lager)

haal de 2 klepdekseltjes eraf en met een lampje zie de status van de veren.
de olieplug magneet en filter (2) vertelt ook veel...

suc6!

klaas
NL

Click to expand...

bedankt voor de reply, gelukkig is die niet mijn topic
Ben toevallig wel bezig met een rebuild, ziehier-->http://www.motor-forum.nl/forum/list_messages/231469/0/Husaberg-FC550-revisie-1.html
Ik zit nu in totaal op ongeveer 3000e aan kosten denk ik, maar dan is ook wel alles nieuw+verbeterd (ook balansgewicht verwijderd)

 

Taffy

Joined Nov 2001

17K Posts | 774+

Ely, England

• May 18, 2009

• #8

i don't think thats valve spring. but i have not had it happen to me so.....

i would say a CFB has collapsed at a guess.

regards

Taffy

 

G

grillbritt

Joined Jul 2008

52 Posts | 0+

Sweden

Discussion Starter
• May 18, 2009

• #9

Thanks for the replies. To bad I'm not good at dutch

What is a CFB?

 

Taffy

Joined Nov 2001

17K Posts | 774+

Ely, England

• May 18, 2009

• #10

i use a programme called babylon so there are no secrets here.

CFB = a cam follower bearing!

regards

Taffy

 

G

grillbritt

Joined Jul 2008

52 Posts | 0+

Sweden

Discussion Starter
• May 18, 2009

• #11

Ok, I guess I start removing the valve cover tomorow, and see what funny stuff hides there...

 

E

ElSnorro

Joined Aug 2007

470 Posts | 13+

The Netherlands

• May 19, 2009

• #12

Sorry for Dutch replies

 

G

grillbritt

Joined Jul 2008

52 Posts | 0+

Sweden

Discussion Starter
• May 19, 2009

• #13

Valve cover off today, it was a broken valve spring on the inlet side.
The washer below the spring has also broken... We have found almost every piece missing

How do I know if the cam follower bearing are toasted? I can move them almost 1 mm sideways, is that good?

See pics and enjoy: http://img413.imageshack.us/gal.php?g=50387368.jpg

 

E

ElSnorro

Joined Aug 2007

470 Posts | 13+

The Netherlands

• May 19, 2009

• #14

Looks like a exact copy of my broken valve spring, same place.

Go for the dual spring kit

 

K

klaas

Joined Mar 2009

22 Posts | 0+

Netherlands

• May 19, 2009

• #15

aha like me, you just joined the ' broken inlet valve spring club'
check your piston if a valve has hit it...
if so your might be in for more damage (in the proces my piston ring also broke)

taffy's dual springs will prevent more valve springs from braking...

klaas550FE