Husaberg
Go Back   Husaberg Forum > Mechanical and Technical > Mechanical

Mechanical Mechanical Forum - spinning bits and gyrating bobs


Reply
 
LinkBack Thread Tools Display Modes
January 20th, 2012, 01:19 AM   #21
Member
 
Joined: Jan 2011
From: Manchester uk

Posts: 74
Thanks: 0

I Ride:
Re: oil breather, loosing oil

i thought it needed to be open and i will undo the kickstart decomp and try to kick it over a few times and let u no the presure thanks
RejekzNoodles is offline  
 
January 20th, 2012, 01:29 AM   #22
Senior Member
 
zaga's Avatar
 
Joined: Mar 2009
From: Portugal

Posts: 1,385
Thanks: 247

I Ride: KTM 300 XC
Re: oil breather, loosing oil

Hi

I've never done the test, but it looks to me that the autodecomp will never let you have max compression, at least in one of the cycles, but at this hour of the morning my brain still doesn't work


ZAGA
zaga is offline  
January 20th, 2012, 08:11 AM   #23
Moderator
 
ned37's Avatar
 
Joined: Dec 2004
From: back in cottonwood, az

Posts: 2,302
Thanks: 189

I Ride: '08 HUSKY te610
Re: oil breather, loosing oil

to overcome the autodecomp, back off the left exhaust valve setting to perhaps a full turn or more.
ned37 is offline  
January 20th, 2012, 01:46 PM   #24
Senior Member
 
Bergini's Avatar
 
Joined: May 2011
From: Wisconsin, U.S.

Posts: 700
Thanks: 3

I Ride: 1995 dakota 408 5spd 8 3/4 rear end
Re: oil breather, loosing oil

I did a service today and decided to check my compression, using electric start and throttle wide open i wasnt able to get an accurate reading, the longer i let it crank (up to 15 engine revolutions?) the higher the guage would get, i got a reading up to 230psi, it definatly cranks faster with the throttle open, with throttle open and a 2-3 second button push psi would be in the 140-160 pressure ranges, if i left the throttle closed and let it crank 10-12 engine revolutions it would max out at exactly 140 psi every time.
i did not try the test with the kick start at all, maybe if using the kick start having the throttle open would be easier because the engine cranks easier? i am not sure why this is required, i got more consitant and im sure accurate results with the throttle closed, i also did not change the valve settings at all while testing, this i am guessing why it takes so many revolutions to max the guage? my bike kick starts ok cold and easy when hot and starts easy with electric start hot or cold, maybe i have something out of adjustment slightly?
When i say revolution i am sure its not a complete revolution but probably 1/2 revolution, each time the engine makes a "ereow ereow ereow" noise i was counting as one revolution...i am not good and making sounds effects and even worse at spelling them, i think you know what i mean...
i am sure i will be enlightened as to why one should check compression with the throttle open shortly....its the middle of the day and my brain still hurts...maybe i am thinking too much ...
Bergini is offline  
January 21st, 2012, 08:17 AM   #25
Moderator
 
berger's Avatar
 
Joined: Apr 2002
From: Phoenix Arizona

Posts: 3,146
Thanks: 9

I Ride: the pine
Re: oil breather, loosing oil

Throttle open. In order to get compression, you need something to compress. The more air available to the cylinder, the more accurate the reading. It is normal on all engines for the compression to climb on additional revolutions. eventually the reading will max out. You want to stick to 3 or 4 revolutions for your test.

The fact that the compression ring is doing it's job does not mean the oil control ring has not failed. In fact if the oil control ring is failed it can allow enough oil onto the cylinder wall to raise the compression readings up to cover a bad or weak compression ring.

And just when you thought you had it all figured out.....
berger is offline  
January 21st, 2012, 11:53 AM   #26
Member
 
Joined: Jan 2011
From: Manchester uk

Posts: 74
Thanks: 0

I Ride:
Re: oil breather, loosing oil

well not tried the compresion test today i just took it out to ride my local track....... and guess wot i broke the frickin kick start right off my bike got a nasty kick back off it so now no compresion test till i get that part sorted out
RejekzNoodles is offline  
January 21st, 2012, 04:41 PM   #27
Senior Member
 
zaga's Avatar
 
Joined: Mar 2009
From: Portugal

Posts: 1,385
Thanks: 247

I Ride: KTM 300 XC
Re: oil breather, loosing oil

I know the feeling My 600 put me in crutches

Buy the newer kick its is much much better


ZAGA
zaga is offline  
January 22nd, 2012, 06:53 AM   #28
Senior Member
 
Bergini's Avatar
 
Joined: May 2011
From: Wisconsin, U.S.

Posts: 700
Thanks: 3

I Ride: 1995 dakota 408 5spd 8 3/4 rear end
Re: oil breather, loosing oil

berger, before i continue i firstly want to say i am not trying to be a smart alec, nor and i saying im right and your wrong by any means, i just do not understand and would like to, all of my knowledge is based on automotive repair, in a car engine compression test one would attached guage throttle closed 3-4 revolutions and the guage is maxed at your reading, exactly like when my husaberg engine turns 10-12 times it maxes the guage at the pressure i would expect to see repeatedly.
with the throttle open i understand there is more air available, the engine cranks easier and gets the reading into the expected range in 3-4 pumps, the difference is that the readings i got were all over the place with the throttle open, if you got to 5-6 pumps now the guage reads 180 psi, if it only got to 2-3 pumps it may only be 120psi, if i would have done the test ten times then took the average i probably would have been at 140psi, it just sees like you are guessing if its done like this, with throttle closed if i did three tests consecutivly it would be 140psi, 140psi, 140psi, thats easier to get an average from...
Originally Posted by berger
The fact that the compression ring is doing it's job does not mean the oil control ring has not failed. In fact if the oil control ring is failed it can allow enough oil onto the cylinder wall to raise the compression readings up to cover a bad or weak compression ring.
that i did not think of, so basically doing a compression test still does not rule out a ring failure unless
the reading was way low and something was obviously broke...

Originally Posted by berger
And just when you thought you had it all figured out.....
I wish.....at least i have baseline on my bike i can compare to later if needed, reguardless if my test is right or wrong, in the future if i do the same test then see different results i can expect something is going on....
Bergini is offline  
January 22nd, 2012, 10:22 AM   #29
Moderator
 
ned37's Avatar
 
Joined: Dec 2004
From: back in cottonwood, az

Posts: 2,302
Thanks: 189

I Ride: '08 HUSKY te610
Re: oil breather, loosing oil

always throttle open. if you were getting varied readings on a husaberg, it was prolly the auto decomp.
ned37 is offline  
January 22nd, 2012, 12:47 PM   #30
Senior Member
 
Bergini's Avatar
 
Joined: May 2011
From: Wisconsin, U.S.

Posts: 700
Thanks: 3

I Ride: 1995 dakota 408 5spd 8 3/4 rear end
Re: oil breather, loosing oil

Ok i think that makes more sense..... i will have to accept that answer untill my next valve adjustment when i can do more testing and be sure that the auto decomp is disabled to not fudge my results, if i was not an auto tech i would probably not be set in my ways on something like a simple compression test procedure and would just take your words as gold, however, my curiosity gets the best of me frequently and unless i can see the results my thick skull prevents my brain from accepting things than are not normal to me sometimes....thanks ned and berger for trying to make sense of that to me, as for Mr. Noodles sorry to hear about you unfortunate luck with the kick start lever and the oil consumption...best of luck finding and repairing the problem
Bergini is offline  
Reply

  Husaberg Forum > Mechanical and Technical > Mechanical

Tags
breather, loosing, oil



Thread Tools
Display Modes


Similar Threads
Thread Thread Starter Forum Replies Last Post
loosing engine oil 2011 husaberg 570 titan Mechanical 3 August 10th, 2012 10:34 PM
Screws/nuts going loose and loosing them... Proemer Mechanical 1 March 6th, 2007 03:12 PM
Breather Mod Question.....Again kez Fuel 10 November 9th, 2006 04:29 PM
loosing coolant Ammo Husaberg 2 December 11th, 2004 08:16 AM
Husaberg 01-03 breather dsducati Husaberg 10 October 5th, 2004 01:52 PM


Facebook Twitter Google+ RSS Feed