Here's some shots of my first build.

GoldenMotor.com

TerrontheSnake

New Member
Jun 1, 2009
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Oregon
Correct me if I'm wrong but you used the original clamshell from the front, drilled through that and through the frame and put a bolt in it?
 

Norco John

New Member
May 26, 2009
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Brookston, IN
OK, so I went to change the front bolt out from a 6mm tinfoil bolt to a 5/16 Grade 8 bolt. I replaced the rear studs with Grade 5.5 metric bolts (metric all-thread's not available here)
After getting everything loose I found that since I took the front derailleur off I can get the motor to set down on the frame the "proper" way.
So no single bolt in the downtube, I have the saddle and clamp plate fastened down the "correct" way.
 

Norco John

New Member
May 26, 2009
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Brookston, IN
Yes it will. I'm concerned about the hole causing a stress riser at that location, but sticking a bolt in it would not change that.
It's in the location of the bottle cage holes/bosses, so perhaps this is a low-stress location.
It's one of the spots that gets checked pre-flight.