KTM 520 AMA questions

yzeater

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May 21, 2001
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#1
How can a KTM520SX race in the 250 class? I thought that the maximum bore of a four-stroke in the 250 class was 450cc's. Was I mistakened? What is the maximum bore in the mini (80) class? Where do they draw the line at production based in AMA rules? Thanks a lot.
 

holeshot

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Jan 25, 2000
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#2
next year

The 450 limit comes into effect next season.
 
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Mar 23, 2000
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#3
I think the limit on the 80 class for 4 strokes is 150cc's.
Think BBR TTR150's. mmmmmmm :p