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MTX 125

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turbo648
L Plate Warrior



Joined: 22 Apr 2010
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PostPosted: 22:38 - 22 Apr 2010    Post subject: MTX 125 Reply with quote
Hi i have a mtx 125. it started to pressure up and push water out the expansion tank and if i take off the radiator cap and rev it up it shoots out. i took the head off to reveal a knackered head gasket. so bought a genuine gasket kit and replaced the head gasket. it ran lovely for about 90 miles with no over heating. but now its started to do the same thing again Mad i have been told i should of got the head skimmed is this true?? and is there a significant way off torqueing down the head bolts?? can someone plz help me.
many thanks
jason
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evoboy
World Chat Champion



Joined: 20 Aug 2009
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PostPosted: 23:45 - 22 Apr 2010    Post subject: Reply with quote
Headbolts should be tightend down in a 'diagonal' pattern, so tighten one down so far, then an opposite one, etc.

Will most likely need the head skimming as it may well have warped from the overheating. My TDR125 was the same till i got the head skimmed, was spot on after Thumbs Up
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turbo648
L Plate Warrior



Joined: 22 Apr 2010
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PostPosted: 23:50 - 22 Apr 2010    Post subject: Re: MTX 125 Reply with quote
turbo648 wrote:
Hi i have a mtx 125. it started to pressure up and push water out the expansion tank and if i take off the radiator cap and rev it up it shoots out. i took the head off to reveal a knackered head gasket. so bought a genuine gasket kit and replaced the head gasket. it ran lovely for about 90 miles with no over heating. but now its started to do the same thing again Mad i have been told i should of got the head skimmed is this true?? and is there a significant way off torqueing down the head bolts?? can someone plz help me.
many thanks
jason

many thanks. just was a bit taken back on the head skimming but that would explain it pressureing back up. once again thanks

jason Thumbs Up
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gwernybwch
Nova Slayer



Joined: 30 Jul 2008
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PostPosted: 19:15 - 27 Apr 2010    Post subject: Re: MTX 125 Reply with quote
turbo648 wrote:
Hi i have a mtx 125. it started to pressure up and push water out the expansion tank and if i take off the radiator cap and rev it up it shoots out. i took the head off to reveal a knackered head gasket. so bought a genuine gasket kit and replaced the head gasket. it ran lovely for about 90 miles with no over heating. but now its started to do the same thing again Mad i have been told i should of got the head skimmed is this true?? and is there a significant way off torqueing down the head bolts?? can someone plz help me.
many thanks
jason


I presume that before the new gasket blew, the bike was close to overheating?
Honda MTX's are well known for overheating. When you have the head skimmed you might want to either test the thermostat (in the cylinder head cover) or remove it completely.
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