GeeTee Posted July 18, 2018 Report Share Posted July 18, 2018 I'm trying to track down a serviceable cylinder head for my 2003 Sherco 125 ST. They are no longer available in UK as a new part and the later 2005 onwards head won't fit my engine. The inner o-ring seal groove has collapsed into the water channel above, just below the hose spigot (probably due to corrosion), and leaks compression straight into cooling system I don't think a weld repair is possible due to thin, cast aluminium material in head. It would also need a lot of machining afterwards to restore groove Quote Link to comment Share on other sites More sharing options...
copemech Posted July 19, 2018 Report Share Posted July 19, 2018 I am pretty sure the 200 head will work, part M387. contact Splatshop! Quote Link to comment Share on other sites More sharing options...
gasserguy Posted July 19, 2018 Report Share Posted July 19, 2018 Richard Allen. http://www.allensusedtrialsspares.co.uk/#/bikes-breaking/4560010283 Quote Link to comment Share on other sites More sharing options...
GeeTee Posted July 26, 2018 Author Report Share Posted July 26, 2018 I'm not going to spend 200 quid to convert a 125 to an 80 The 200cc head has a different combustion chamber shape I've tried Richard Allen, Spiatshop and Trials bike breakers uk - zero 2003 heads available new or used so I'm screwed Plan B is to fit a spare 1999 spec 250 engine i have into the frame. Without a head the 125 motor is junk Quote Link to comment Share on other sites More sharing options...
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