Bird Engineering Frame, engine mount offset?

B

Brian Sheridan

New Member
#1
#1
Guys,
I am restoring a Bird Engineering minibike frame. The engine mount had been taken off. I'm welding a new one on. Does anyone know what the engine slot offset is to the right side was? I can post a photo of the frame if needed, it is not a swing arm frame, and it does have a jackshaft, and the aluminum scrub brake. It's basically a Sears, Penny's type frame.
Thanks
Brian
 
creia

creia

#2
#2
Assuming that the mounting plate comes pre-slotted? If so, before welding it, I would do a "dry fit" and set the mounting plate in the frame with the engine you want to use installed and line up the clutch and jackshaft sprockets and chain, mark it and THEN weld it.
Michael
 
B

Brian Sheridan

New Member
#3
#3
creia said:
Assuming that the mounting plate comes pre-slotted? If so, before welding it, I would do a "dry fit" and set the mounting plate in the frame with the engine you want to use installed and line up the clutch and jackshaft sprockets and chain, mark it and THEN weld it.
Michael
Click to expand...
Creia,
Thanks for the reply. I plan to mock it up with a new Hemi 212, I was just hoping someone had a number to save me the trouble. I spent a hour today TIG welding all the tubing joints that Bird Eng. didn't bother to weld, I guess Sears customers never noticed, go figure.
Brian
 
massacre

massacre

#4
#4
Creia told you the correct way.
This is not a job you want to guess at.
And if you are a TIG welder, I’m pretty sure you already know this.
every bike is different
 
massacre

massacre

#6
#6
Pics are definitely helpful, but the only way to get it dead nuts perfect is to mock it up like you said.
1/4” either way and you’ll likely have chain alignment problems.
 
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