yzeater

~SPONSOR~
May 21, 2001
1,996
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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

Crazy Russian
LIFETIME SPONSOR
Jan 25, 2000
1,823
0
next year

The 450 limit comes into effect next season.
 
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