That's how they used to start the bikes for racing. A part of the trick is timing it so that you kinda slam your body weight down at the same time you pop the clutch. You slam your weight down over the rear tire so that it doesn't skid along and rotates more/faster. They did bump starts for motorcross for years and years.
Was that to save weight by not having the kickstart mechanism?
As of 2018, they use a tool to spin the crankshaft and start it that way.
See? We're learning good stuff tonight!
that makes sense, quick and easy
Yeah, they use a starting block. They don't have anything like a starter, kick start, or even an alternator or battery.
Yeah and I think it might have been a rule. I'm not sure how they start them now, 'cause you still see some of them running along side the bike to get it started again after they've gone off the track and not able to/forgot to grab the clutch so they stalled out.
There's also some benefit to bump starting in 2nd with some engines/transmissions - as there's less compression.
I'm not sure, but I think some of them start the bike by spinning the rear tire with a special tool. I haven't watched like motogp in a long time.
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