70 degrees or 75

Jack Skip

New Member
Dec 26, 2016
19
0
0
Abaco Bahamas
What is the mounting geometry of a china girl?

Does it vary?

48cc vs 66cc?

Which bike frames are best for this?

Crassius. Leave me alone, don't kill this one too.
 

ultralight01

New Member
Oct 30, 2016
337
0
0
Hood River, Oregon
66cc is best for power and overall practicality. Pretty much any bike frame with disc brakes, a suspension fork and a big enough spot in the frame.

You can mount the engine in literally any orientation. There's a member who mounted one upside down. It's a two stroke, they're not as pesky as a four.

Basically, get a bike, fit the engine somehow, and make it work. The engine will run fine.
 

xseler

Well-Known Member
Apr 14, 2013
2,883
126
63
OKC, OK
Main thing is to keep the carb pretty close to level..........a little bit of angle won't hurt anything!

Best of luck in your upcoming build!!
 

cannonball2

Well-Known Member
Oct 28, 2010
3,662
150
63
Colonial Coast USA.
The engines were originally designed years back for what I call the "double diamond" frame.(see pic)
As has been said here there are so may ways to mount to different frames, and many mounts available it basically your pick. Just choose something with enough room for the engines dimensions. A lot of MTB frames are pretty tight. Generally most cruiser frames will require and extended front mount, which are easily found. Depends on how much work you want to put into getting it mounted.
 

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