missing dimension
- Thread starter gjr
- Start date
- Status
- Joined
- Dec 3, 2012
- Messages
- 3,727
bwolfie said:
Indeed.
I edited that picture in after a google search which came back to a thread on this website.
If I don't see any measurement replies I will get one off my frame after lunch,I can not guarantee my frame is within 0.002" though :lol:
- Joined
- Nov 20, 2004
- Messages
- 20,415
Someone added "285.75mm" to the drawings in the "online" manual before it was copied to pdf.
http://britmoto.com/manuals/Manuals/750_man.pdf
http://britmoto.com/manuals/Manuals/750_man.pdf
- Joined
- Dec 3, 2012
- Messages
- 3,727
opp = 285.75
adj = 363.47
hyp = 462.34 - My 750 frame has minimal bow in the top tube (+0.6 degree included angle / hyp = 259.14)
I have doubts about both 363.47 and 452.12 < which suggests 105.69 mm height front to rear isolastic mount hole.
464.31 seemed fine on my frame.
adj = 363.47
hyp = 462.34 - My 750 frame has minimal bow in the top tube (+0.6 degree included angle / hyp = 259.14)
I have doubts about both 363.47 and 452.12 < which suggests 105.69 mm height front to rear isolastic mount hole.
464.31 seemed fine on my frame.
IMO. The vertical dimension that we are after, in hindsight would be average/nominal......... ask yourselves, why is the slotted vertical holes in the headsteady plates......... why is because the welding of the frame in that area would vary day to day welding from shrinkage/distortion..... To me it is now obvious why the "manual" does not have a dimension.... cos it can not be a gaurantee dimension. Most other you can (within a mm )... but the fabrication process/layout requires the "spine" to bend in that position............. so how can you have a measurement to .000 as the rest....... 
- Joined
- Jul 25, 2010
- Messages
- 5,865
They probably removed it as it was incorrect as that was where they were all differant due to the bow from the welding . :lol: 
:lol: :mrgreen: Non Critical Id think - youd just bend the head steady . :shock:
:lol: :mrgreen: Non Critical Id think - youd just bend the head steady . :shock:
concours
VIP MEMBER
- Joined
- Dec 29, 2011
- Messages
- 9,439
olChris said:IMO. The vertical dimension that we are after, in hindsight would be average/nominal......... ask yourselves, why is the slotted vertical holes in the headsteady plates......... why is because the welding of the frame in that area would vary day to day welding from shrinkage/distortion..... To me it is now obvious why the "manual" does not have a dimension.... cos it can not be a gaurantee dimension. Most other you can (within a mm )... but the fabrication process/layout requires the "spine" to bend in that position............. so how can you have a measurement to .000 as the rest.......
+1.. I agree with olChris.. the as-built slush was allowed here... a nominal dimension, slots to compensate. My engine (even with old, saggy boo.., er, I mean old, saggy ISO'S) sits tall in the frame, all slotting is used up. Top mount was very close (about 5/32") to the spine before I relieved that radius a bit more. I my fervor to reduce engine height, I fitted a thinner head gasket.. :mrgreen:
- Status
