Husaberg
Go Back   Husaberg Forum > Mechanical and Technical > Mechanical

Mechanical Mechanical Forum - spinning bits and gyrating bobs


Reply
 
LinkBack Thread Tools Display Modes
May 26th, 2011, 03:58 PM   #11
Senior Member
 
bushmechanic's Avatar
 
Joined: Jun 2007
From: south east WA Australia

Posts: 3,868
Thanks: 1215

I Ride: 2008 700FK, 2002 628FST
Re: camshaft alignments on various years?

Re the decomp spring and the sprocket shiming this might help

FWIW this is untested (hey I should sell it to everyone in my ebay shop )

the older KTM one is stiffer wire (same diam just better wire) it works better and has 1 less turn than the berg one.

the spring on the right is the spring out of my 08 650. I preloaded it more but the end broke off

to make it stiffer I cut off some coils from the lower end and bent the coil out until it worked properly you can see the end makes it more preloaded than the oem and less turns means its stiffer.

if you wind more preload on the spring it gets too small in diam and bottoms out on the shaft then the ends get deformed and eventually break like mine did it needs to be a stiffer spring not just preloaded more.

its truncated here but can click the link below


cutting coils off the end is easy the wire handles being bent just try not to have any sharp bends, wind the coil out straight untill you have what you want then snip off the end mine now has 13.25 coils total, the KTM spring has 14.5 coils and mine originally had about 15.5
Attached Thumbnails
camshaft alignments on various years?-spring-mod.jpg  
bushmechanic is offline  
 
June 15th, 2011, 12:40 PM   #12
Senior Member
 
Joined: Aug 2007
From: The Netherlands

Posts: 470
Thanks: 13

I Ride:
Re: camshaft alignments on various years?

I am working on the KTM 8/33 cam (see gallery for pics)
Ditched the waterpump-end
Found out i needed a 2mm shim for this cam to be aligned properly

My cam gear is 0,14mm off where it was on the old (53 regrind) cam. I suppose this little wont be a problem?

Is it possible to use 'normal' Philips screws instead of Allen type to secure the cam gear?
The allen screws on this cam are worn out, and i prefer philips srews.

Will post some more pics/info/questions tomorrow
ElSnorro is offline  
June 15th, 2011, 01:36 PM   #13
Senior Member
 
Joined: Oct 2004
From: Reykjavik Iceland

Posts: 275
Thanks: 3

I Ride:
Re: camshaft alignments on various years?

My guess would be that the Phillips screw would not handle the tightening torque (eg the slot would strip)
these are DIN7984 so they should be 8.8 strength class i think (2 min google work)

On another mater.
Do you have older head pre 2004 i mean. just wondering what mods need to be done to make a cam like
this fit in my bike. We have established that the 2004 on bikes have a 1,5 mm shorter cam. Do you have
to, "Time" this cam in (grind the bolt holes on the sprocket) to make it fit?

Regards
The_Force is offline  
June 15th, 2011, 11:59 PM   #14
Senior Member
 
Joined: Aug 2007
From: The Netherlands

Posts: 470
Thanks: 13

I Ride:
Re: camshaft alignments on various years?

Originally Posted by The_Force
My guess would be that the Phillips screw would not handle the tightening torque (eg the slot would strip)
these are DIN7984 so they should be 8.8 strength class i think (2 min google work)

On another mater.
Do you have older head pre 2004 i mean. just wondering what mods need to be done to make a cam like
this fit in my bike. We have established that the 2004 on bikes have a 1,5 mm shorter cam. Do you have
to, "Time" this cam in (grind the bolt holes on the sprocket) to make it fit?

Regards
Sorry my mistake, i would just use 'normal' 6 sided screw (8.8 strengt offcourse) instead of the allen screws used by the factory. I think this is possible?

Yes i have the old pre 2004 big-valve (37mm) head.
This cam just fits straigt in, sprocket is aligning perfectly, its just getting rid of the water pump piece, and shim it out for rocker alignment.

edit:
Other question:
I have 2x SKF 6203-2Z C3 Bearing lying here (new). the have a steel casing:


Can i use this as cam bearings or should i try to remove the steel insert from the bearing?
ElSnorro is offline  
June 16th, 2011, 03:49 PM   #15
Senior Member
 
bushmechanic's Avatar
 
Joined: Jun 2007
From: south east WA Australia

Posts: 3,868
Thanks: 1215

I Ride: 2008 700FK, 2002 628FST
Re: camshaft alignments on various years?

the hex heads should work fine that's a great idea actually

I would use rubber seal bearings with the rubber seals in, the metal shields should be OK but they won't keep out debris like the rubber ones, if using the metal shielded ones leave the shields in
bushmechanic is offline  
June 17th, 2011, 11:07 PM   #16
Senior Member
 
Joined: Sep 2006
From: Hayle Cornwall

Posts: 987
Thanks: 22

I Ride:
Re: camshaft alignments on various years?

Hi ElSnorro,

Just been looking at the photos you put up of the cam and sprocket, it looks like you have incorrectly assembled the decomp spring, the trailing part of the spring goes up against the camshaft not against the cam sprocket bolt.

When the decomp arm is fully open is it clear of the cam sprocket bolt head.

Regards

Sparks.
sparks is offline  
June 20th, 2011, 01:51 AM   #17
Senior Member
 
Joined: Aug 2007
From: The Netherlands

Posts: 470
Thanks: 13

I Ride:
Re: camshaft alignments on various years?

Hi Sparks,

i dont fully understand what you mean.
My decomp stops against the cam bolt (like the 04+ cams) but it is clearing the cam lobe so its not opening the valve.

Do you mean this?
ElSnorro is offline  
June 23rd, 2011, 11:36 PM   #18
Senior Member
 
bushmechanic's Avatar
 
Joined: Jun 2007
From: south east WA Australia

Posts: 3,868
Thanks: 1215

I Ride: 2008 700FK, 2002 628FST
Re: camshaft alignments on various years?

Just fitted a HC3015

engine apart so could check sprockets etc with straight edges, the tooth fairy couldn't find any teeth so she stole one off 4th gear

needed a 1.2mm shim to align the sprockets and the cam tensioner slider needed moving about 1mm, and a bit ground off one side further down to clear the cases

sounds nasty but the original 08 cam had the same issues just a bit less wrong (about 0.6mm out)

to get the LCs as per the spec card I had to advance the timing about 5 degrees from "central" this amounts to about a 1mm gap between the top of the exhaust lobe and the straight edge if aligning to the top of the head.

the durations and cls for 40 thou I could only get close with zero lash, depends what you call zero as well

intake open 21 close 66 duration 267 CL 112.5 lift 10.6mm
Exhaust open 63 close 21 duration 264 CL 111 lift 10.3mm
LSA about 111

Sparks got the same as the spec card with the lash set so I dunno what the G.O is maybe some quality control issues, we both checked numerous times.
bushmechanic is offline  
June 24th, 2011, 04:03 AM   #19
Senior Member
 
Joined: Sep 2006
From: Hayle Cornwall

Posts: 987
Thanks: 22

I Ride:
Re: camshaft alignments on various years?

Originally Posted by bushmechanic
Just fitted a HC3015

engine apart so could check sprockets etc with straight edges, the tooth fairy couldn't find any teeth so she stole one off 4th gear

needed a 1.2mm shim to align the sprockets and the cam tensioner slider needed moving about 1mm, and a bit ground off one side further down to clear the cases

sounds nasty but the original 08 cam had the same issues just a bit less wrong (about 0.6mm out)

to get the LCs as per the spec card I had to advance the timing about 5 degrees from "central" this amounts to about a 1mm gap between the top of the exhaust lobe and the straight edge if aligning to the top of the head.

the durations and cls for 40 thou I could only get close with zero lash, depends what you call zero as well

intake open 21 close 66 duration 267 CL 112.5 lift 10.6mm
Exhaust open 63 close 21 duration 264 CL 111 lift 10.3mm
LSA about 111

Sparks got the same as the spec card with the lash set so I dunno what the G.O is maybe some quality control issues, we both checked numerous times.
Hi Bushie,

Good to hear you have got the cam fitted at last, strange about the setting though, I had no problem with mine, like yours about 5 degrees required to centre everything but that done all the figures fell into place at 40 thou lash.
What do you think of the performance or have you not got it up and running yet.

Got about 1500 miles on mine and it performs great, even the bottom end and mid range torque is good.

Had to carb in bits last week due to over zealous with the hose pipe. While in bits and on inspection I noticed fairly bad grooves worn in the throttle body from the slide wheels 4 front and 4 back, so filled these in with my red encapsulation compound and made everything perfectly flat, to do this I had to remove the D shaped casting in the throttle body.
After reassembly I fired her up, ran like a bag of crap, massively over rich, turned out to be the complicated little O ring seal that sits on the D casting, this is not a serviceable part so I had to use the smallest amount of Wurth sealant around the existing O ring, reassembled job done perfect.
So anyone who is wanting to take on this minor repair just be aware of that O ring sealing properly.
Now there is a good seal between slide and body the engine runs a lot better at the bottom end, must of been sucking air before leading to over leanness at the bottom end. It also gets rid of all that clacking ratterling noise.
Wonder how many other people are suffering the same symptoms and are not aware of what is causing it.

Regards

Sparks.
sparks is offline  
June 24th, 2011, 04:39 AM   #20
Senior Member
 
Joined: Aug 2007
From: The Netherlands

Posts: 470
Thanks: 13

I Ride:
Re: camshaft alignments on various years?

Sparks please open up a new thread in the fuel department (if possible with some pics??)

Very useable info i gues!!
ElSnorro is offline  
Reply

  Husaberg Forum > Mechanical and Technical > Mechanical

Tags
alignments, camshaft, years



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
New years resolutions eyspy Husaberg 1 December 30th, 2010 07:32 PM
20 years !! hsb43 Husaberg 3 August 6th, 2010 12:57 PM
New years eve meander cypher Ride Reports 4 January 3rd, 2010 03:23 PM
New Years Day Husabergler Husaberg 4 January 1st, 2006 01:01 PM
Bad Years? javo Husaberg 10 May 26th, 2004 11:18 AM


Facebook Twitter Google+ RSS Feed