Tacho goes to 9K.
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- posted
12 years ago
What does yours go to?
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- posted
12 years ago
My needle stops at 7. And it doesn't go totally batshit when it gets there.
That looks quite mad.
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- posted
12 years ago
A friend had a CBR250RR four stroke bike that redlined at 21 and a half grand. Madness. It sounded like an F1 car.
Fraser
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- posted
12 years ago
I think he gets to about 8.5K on a motor that's redlined at 7.2K.
But has he taken it to 125% redline speed (RLS)? 26.8K.
I twice took a CB125S that's redlined at 9.5K though the red band and
1K back into the green at 12K (125%RLS). It was pulling so well at that rpm in top it didn't slow down up a hill.Doing the calcs for port size and valve timing, the max power speed of a lot of engines will turn out to be higher than redline. Run them into the red and lol and behold there is a power peak. There's a bloke calls himself motoman with a site mototuneusa that advocates making inlet ports smaller to bring the tuned rpm down within the redline speed for proddy racing as they aren't allowed to mess with the limiter.