checking frame for straightness

stu_m said:

I have chance of a frame pretty cheap and want to know the best way to check that its straight if anyone knows :O

I'm thinking of a little project :devious

Click to expand...

Well, by default the "best way" to check straightness is to have it done by a pro.

On the other hand, there must be plenty of frames on the road that are slightly "tweaked" one way or the other.


There are a lot of options on the web...


These guys may be able to provide some insight....
http://www.motoliner.com/motorcycle-frame-straightening/modern-and-scooters.php



This company considers these to be the critical parameters.

The mega-M.A.X. System measures the following critical dimensions of your mototcycle:
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• Camber Angle​
• Steering Head Angle​
• Distance from the Swingarm Pivot to the Steering Axis​
• Height of the Steering Head, relative to the Swingarm Pivot​
• Tail Offset​
• Rear Wheel Offset​
• Distortion of the Swingarm​
• Alignment of the Swingarm​

Once the motorcycle is measured, you'll be provided with a clear, concise, easy to read print out of the results. The print out shows at a glance how close each critical measurement is to the factory specifications."

http://www.mphohio.com/megamax.htm


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Just some ideas.....