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Changing head
Posted: Mon Jan 26, 2009 10:16 pm
by Spinal
I know this topic has been addressed, but I need to know some more.
I am replacing the top head, as one of the spark plugs was ejected, taking the thread with it.
I have all the parts I need, but can't find details of torque settings and tightening sequence to fit new head. I have found valve clearances from Bat Motorcycles, but as it's an import, information seems to be very light on the ground.
Any info would be greatly appreciated. Cheers
Re: Changing head
Posted: Wed Jan 28, 2009 10:24 am
by Variablevalves suck
Hi
Have the info but not at hand, will post on thurs night.
I do know that the tightening sequence starts at the middle nut and then X crossess its way out towards the sides, im sure if you look they had numbers cast on the cylinder head at the side of the nut?
Re: Changing head
Posted: Wed Jan 28, 2009 7:55 pm
by Spinal
Thanks, I'll have a look for them. Haven't really had a proper look yet, wanted to try and get some info before I start stripping the bike down.
The other info would be great, thanks.
Re: Changing head
Posted: Wed Jan 28, 2009 9:03 pm
by Variablevalves suck
If you d'nt want to strip it im sure some of the better workshops can fit a threded insert with the head still in place!
Re: Changing head
Posted: Wed Jan 28, 2009 10:45 pm
by Spinal
I was told this after I had bought another head. Originally I was told the head would have to come off to do this anyway, so I tht it easier just to buy another one.
Never mind, live and learn ey. The money's spent now, so I'll stick with it.
Re: Changing head
Posted: Thu Jan 29, 2009 8:54 pm
by Variablevalves suck
Right mate here we go!
Initial torque setting is 10N-m/7 lb-ft, final torq is 27N-m/20 lb max of 29N-m/21 lb-ft .
Then looking at the motor from above/behind with the exhaust ports away from you and the inlets facing you, you start with the left/center/exhaust side nut then rgt/ctr/in nut - rgt/ctr/ex - lft/ctr/in - lft/mid/ex - rgt/mid/in - rgt/mid/ex - lft/mid/in - lft/out/ex - lft/out/in - rgt/out/ex - rgt/outer/inlet nut. Hope you can understand what im sayin and hope this is of help.
Re: Changing head
Posted: Thu Jan 29, 2009 9:40 pm
by Spinal
Diamond. Thank you, I have been trying to get hold of that for a long time.
Finally I can get the little rocket back on the road!
Couldn't be clearer mate, thanks a lot. I'll let you know how it goes.
Re: Changing head
Posted: Thu Jan 29, 2009 9:42 pm
by Spinal
Diamond. Thank you, I have been trying to get hold of that for a long time.
Finally I can get the little rocket back on the road!
Couldn't be clearer mate, thanks a lot. I'll let you know how it goes.
Re: Changing head
Posted: Thu Jan 29, 2009 9:47 pm
by Variablevalves suck
Nice one! you havin probs postin, there is something goin on with this site!
Re: Changing head
Posted: Thu Jan 29, 2009 10:05 pm
by Spinal
Yeah, site crashes, so I have to rewrite mes.