Question about 1987 Yamaha SDR

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93 artic cat jag head torque pattern and specs

Leaking oil around the head gasket wondering what the torque should be for the new gasket

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  • nuttbysteve Feb 13, 2009

    Thank-you!!!

  • Anonymous Mar 15, 2014

    Torque for head gasket in a 2008 R1

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  • 11 Answers

The best place to find it is the service manual. if not avail. i usually 1, tighten it to ~10-20Nm in a 'outwards spiral' fashion, ie start tightening from centre bolts outwards. 2, spiral tighten by 1/4 turn, 3, another 1/4 turn, and 4, final 1/4 turn.

Posted on Feb 13, 2009

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1 Answer

Torque specs for head bolt on a 1999 harley flsts


Oil bolt threads.
Tighten head bolts in an "X" pattern.
Tighten bolts to 7-9 ft/lbs
Tighten bolts to 12-14 ft/lbs
Using a Sharpie type pen, make a vertical mark on the bolt head and a matching mark on the cylinder head next to it.
Tighten each bolt 1/4 turn, using marks as a guide.

That's it!

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sounds like a bad head gasket...that is where the coolant will leak into the oil. Should be an easy fix, just change the gasket and torque the head back on to the correct specs.

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97 honda cbr 600 just replaced the head gasket but the bike is still leaking oil into the coolent. Also bike idles high around 3 4grand and shuts off when it gets hot


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Good luck
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Just put new piston and rings in my 1993 liquied cooled polaris 350cc ATV and after starting, right away it starts to bubble back in to my overflow bottle. With in 3 min. it starts to overflow. checked to...


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2006 Triumph Bonneville T100 leaky head gasket


G'Day,
For the price you have been quoted, it may be that it just requires to be re-torqued to pull up the leak. Or even just a resealing of the cam/valve gear covers. Changing the head gasket would be somewhat more work/expense. This is a fairly easy task to accomplish if you have some spanner experience, a torque pattern to follow, and the tools to do it. If you have no tools, then it could cost you $200 for a cheap torque wrench, socket set, other tools you will need.
Any time you start tearing down a motorcycle, good idea to go get yourself should get yourself a workshop manual(click here for a Haynes $42.95)to start. This is where you can get knowledge on how to strip down the bike to the point you can do it, and also correct sequence / procedure for torquing the head to spec. You would need to pull the tank, seat, and so on, good experience if you wanna get your fingers dirty. Get into it if you are game.
regards robotek

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1 Answer

What are the torque specifications for the heads on sporster


You didn't say what year model. Sometimes the heading at the top of these postings are not correct.

For an Evo Sportster, the head bolts must be torqued in a particular sequence. The head bolts are labeled #1, 2, 3, & 4 in the drawings, not literally. The front head bolts are numbered differently from the rear as well.

You torque the bolts in three steps. The first step, you torque the bolts to 7-9 foot pounds. Then you torque them to 12-14 foot pounds. And finally, you mark each bolt and pull it down an additional 1/4 turn. You must torque the bolts in the following sequence.

On the front head, the #1 bolt is the front bolt on the left side of the cylinder head, then the #2 bolt is the left rear bolt, #3 bolt is the right front, and #4 bolt is the right rear as viewed from the top of the head.

On the rear head, the #1 bolt is the bolt at the left rear, #2 bolt is the bolt at left front, #3 bolt is the bolt at right rear, and #4 bolt is the bolt at right front as viewed from the top.

Do not forget to put the O-rings on the dowels when you put the head gasket on and oil the threads of the studs. Make sure you put a new cylinder base gasket on the bottom of each cylinder as well. Once the torque has been taken off the cylinders, the base gaskets will leak unless they are replaced.

On an Ironhead, the head torque is 60-70 foot pounds tightened in a criss-crossed pattern.

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1 Answer

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No - The gasket doesnt need anything to seal it ....
u hafta be REALLY careful on those head bolts.....Torque in a cross pattern in 5 lb increments to 40 lbs. Make sure u oil those bolts before u start .. take your time

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