Regarding Sub-Frames for Supersport Classes
The late model Yamaha R1 has a cast magnesium subframe, which shatters in even a seemingly minor low-side crash.
After witnessing several riders shattering their sub-frames, I would like to be able to replace mine with an aluminum one for better crash protection.
I don't believe that the aluminum one would be a lot lighter (if at all), but it would make the bike safer and more durable.
There are currently riders racing with broken magnesium subframes on their R1s because they don’t want to violate supersport rules.
The current rule for subframe on page 8 of the rulebook (section 2.2.2 C,I) reads:
"i. Sub frame, but must be constructed of the same material as the original part."
Suggested Change:
"i. Sub frame, but must be constructed of the same material. Cast magnesium OEM subframes may be replaced with aluminum subframes for durability.”
