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Discussion Starter · #1 ·
All,
Hope this post finds you well. Has anyone seen or have the specs for our valves. I was going to see if I could sources 1-2mm larger diameter valves. I've seen someone in the Twins forums had found a match for their Bonnie.
Thanks,
Triton
 

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I think they are all the same (900 v's 1200) what changes is the timing the 1200 with more HP is 27 deg BTDC and the lesser HP 1200 and 900 are 21 deg BTDC.
valve head Dia In: 30.0mm
Ex: 26.0mm
valve stem Dia In: 5.490/5.475mm
Ex: 5.470/5.455mm
valve Guide bore Dia 5.515/5.500mm
valve seat width (in head) 1.1mm/0.9mm(1.5max)
valve seat width (valve) 2.5mm/1.8mm
valve seat angle 45 Deg
can't help with the length. and the lift is a bit different 1200 to 900 depending on model Super 3 has a comp Of 12.0:1 Timing is 27deg BTDC and lift is .5mm to .7mm higher Hope this helps. You could check out Kwaka parts I used their valve stem seals because they wear cheaper. Can't remember the part number for them
 

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Discussion Starter · #3 ·
Thank you kind sir! I will have my hands on my bikes and the spare head I have in two days (been in shipping from a move). Unfortunately the head came sans valves. Oh, I'll have my manual too.
 
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