Xr69 frame drawings/dimensions

[Glenroald17]

I am looking for some help to get some drawings and dimensions to build a xr69/harris f1 myself. Any help would be appreciated 

[dupersunc]

28 minutes ago, Glenroald17 said:

I am looking for some help to get some drawings and dimensions to build a xr69/harris f1 myself. Any help would be appreciated 

Which type?  twin shock, Mono shock?  What engine?   The original gs1000 motor, or the TCS oil cooled versions which has modern geometry and is smaller to suit the oil cooled motor.

The you have the Harris F1 frames which are often called xr69s but frames are different, and all vary depending on the engine originally fitted.

If I were building one from scratch I'd build my jig around a modern ish 750cc+ sports bike chassis, sit my engine where I want it, and join the dots using pictures as reference.

[Glenroald17]

Geometry wise I’m going for more modern. I would like to be able to do a monoshock as wel as dual, if I decide to build another one. I’m using a dot head 750 engine. I am looking for tube specs, some basic dimensions, photographs, anything really

[dupersunc]

Originals were T45 or reynolds 531 I believe.   

T45 is quite readily available still, though not cheap, or something like CFS 3BK  is fine. If you are Brazing don't use 4130 cro-mo 

Frames are a mix of 1. 1/8" and 1" 16g  Seat frames are 18g 

There are 100s of detailed frame pictures on google.  Plenty on here too.

If I get a chance I'll measure the frame tubes on my F1.

There's also a facebook group for Harris F1 and XR69.  Loads of info and helpful people on there including ex Harris employees.

[dupersunc]

Chassis Building - SNT Race Engineering

[Glenroald17]

Thanks, that’s a great start, looks a lot easier to build then my Nico bakker fj1200