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Premium Member
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Discussion Starter · #1 ·
Does the '89 750 head fit on an '87 1100 (1052)? Does it give any advantage?
Thanks all. Troy 341
 

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Yes they will bolt up, the main advantage is more compression. Other than that there is no real advantage. ports and valves are about the same.
 

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YAAFM Mod
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Actually the 88-89 750 head has the larger valves of the 1127 engine unlike the 85-87 or 90-92 750's
also the ports flow better.
Bones
 

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According to A.P.E. and Ferrea valves:
86/92 750:27mm in/24mm ex.
86/92 1100:28.5mm in./25mm ex.
 
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