Question about 1998 Honda XR 250 R

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Need cylinder and cylinder head torque specifications 98 XR 250

Freshening up top end, need torque spec.

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  • Anonymous Mar 13, 2014

    2009 dr 650 se head torque specs

  • Anonymous Mar 30, 2014

    Need head torque on a 1986 kx 250

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You dont need torque specs on that just use a 1/2 inch drive with you 14mm or16mm socket hold the wratchet right at the top and tighten it as tight as you could get it like that then use wratchet in normal position and just give it a little snugg it will be perfect i have done it a million time on the same type of bikes...

Posted on Dec 05, 2008

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G'day. The torque specs for the 8mm head bolts is 18ft/lbs.the jug?(cylinder or barrell) is just tightened down even & firm, as there is no acess for a torque wrench.
OK. other things to note.
Clean the cylinder first in solvent(kero or fuel).Then in warm soapy water in a bucket. Dry-(compressed air is best for this-wear eye protection).once dry lubricate all power valves with oil.
Using a clean white rag-soak the end in your 2 stroke oil & wipe the inside of the cylinder surface untill the rag comes back clean(you will need to do it a couple of times-turn the rag over & do it again).Lube the new piston just before assembly-Also pour a little oil down the main bearing oil holes & over the big end too.
Other things to be sure of are-
Piston on the right way round-arrow to the exhaust.
Rings right way up. Some 2stroke dirtbike rings will only go one way up.Look CLOSELY at the ring ends-on the upper or lower surface there may be an etched dot or "T" or "N" or other marking. the mark goes facing up(on both rings unless single ring piston).
rings positioned with end gaps over the locating pins(the ring grooves have a pin in them to stop the ring turning)
Piston pin clips in correctly.
Powervalve moves freely.
Again-watch when you fit the cylinder-it can be tricky to keep the ring end gaps over the locating pins as you feed the cylinder over the piston.
Hope this all helps
Regards(done this a thousand times)Andrew Porrelli

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1 Answer

How lbs. torque is necesary for top end? for kxf 250 05


Torque - 10 mm Cylinder Head Bolt : 49 N·m (5.0 kgf·m, 36
ft·lb)
Torque - 6 mm Cylinder Bolt : 12 N·m (1.2 kgf·m, 104 in·lb)
6 mm Cylinder Head Bolt : 12 N·m (1.2 kgf·m, 104 in·lb)

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Hello, I have a Honda XR250 1990 (europe) Black smoke and licht noise in cilinder, what to do ? Thankx zegersjulien@hotmail.com


Did you ever done Decarb for your Motor Cycle ? It is recommended to do a Decarbonisation of Cylinder Head and Replace the liner every 30000 - 40000 Kms .
Black Smoke Can be Because of
1. Damaged Cylinder Liner 2. Dirty Cylinder Head 3. improper Combustion 4. Fuel problems 5. Fuel Pump / Carburetter Problems
need Physical Examination Foe a definite Solution

Please Rate my answer and Support me

Nov 21, 2010 | 1990 Honda XR 250 R

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Just rebuilt the top end on my 1999 kx 250 and wondering what the torque specs are for the head and cylinder


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Torque specifications for 1995, honda xr 250r


Hi rompypompy
You can down load a manual that has all the torque specs here.  I have the PDF as well,and it lists everything you need. Any problems just comment me back here. 
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Apr 02, 2009 | 1995 Honda XR 250 R

1 Answer

91 kx 250 torque values


Engine Top End:
Auto Decompressor Bolt 104 in·lb
Cylinder Head Cover Bolts 87 in·lb
Cylinder Head Bolts: M10 36 S
M6 104 in·lb S

the S in that means the specified pattern ... just like tightening car tire bolts... please note all that it its INCH lbs....

don't know why it says just 36 for the M10 bolts unless they left out inch lbs

Anything else let me know as i've got a manual for the 250 f... actually i've got a few different ones

Robert

Please take a moment to rate this solution as i've taken a few minutes to find the manual thanks

Jan 28, 2009 | kawasaki KX 250 Motorcycles

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