Changing head

Spinal · Post by **Spinal** » Mon Jan 26, 2009 10:16 pm

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

Wed Jan 28, 2009 10:24 am

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?

Spinal · Post by **Spinal** » Wed Jan 28, 2009 7:55 pm

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.

Post by **Variablevalves suck** » Wed Jan 28, 2009 9:03 pm

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!

Spinal · Post by **Spinal** » Wed Jan 28, 2009 10:45 pm

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.

Post by **Variablevalves suck** » Thu Jan 29, 2009 8:54 pm

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.

Spinal · Post by **Spinal** » Thu Jan 29, 2009 9:40 pm

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.

Spinal · Post by **Spinal** » Thu Jan 29, 2009 9:42 pm

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.

Post by **Variablevalves suck** » Thu Jan 29, 2009 9:47 pm

Nice one! you havin probs postin, there is something goin on with this site!

Spinal · Post by **Spinal** » Thu Jan 29, 2009 10:05 pm

Yeah, site crashes, so I have to rewrite mes.

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