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Lean angle of the bikes

7.3K views 20 replies 12 participants last post by  select20  
#1 ·
On the Motogp site, there is an article talking about how they lean the bikes over to 64 degrees, making a big deal out of it. When I watch the races, I never see the yamaha's go more than 56, and MM gets his to 61 all the time.

Now, I actually have a question about this. Obviously you need to lean the bike over to turn it and generally the more lean angle, the sharper you turn right? Now with both Pedro bot and MM getting more lean angle than the Yamaha's through a corner by a few degrees, yet generally the Yamaha's getting faster corner speed.... well, it's confusing to me.

Anyone care to just explain this or just talk about it? I don't even know how to phrase my question because I am a bit confused I think. They're using the same tires, so why are the Honda's leaning a bit more usually? Not a big deal really, just something I don't understand completely.
 
#4 ·
When you're speaking of lean angle you also have to take the line into consideration and riding style. Let’s look at Josh Hayes and Josh Herrin. Both ride identical bikes, but Hayes riding style compared to Herrin is different in that Hayes does not lean the bike that far while Herrin style is to lean it more. Hayes leans the bike as much as he needs to and no more; because of this, he is more on the meat of the tire and is able to accelerate harder out of the corners. As we can see in AMA, this is allowing Hayes to be 3-5 sec ahead of the competitors. Now on the other side, MM really leans his bike and is able to go really fast through the turns. They say that riders who come from the 600 class lean more because of the nature of the less aggressive power of a 600 compared to a liter bike. Plus the new generation riders are more comfortable with modern traction control and have full faith in them while the older riders would rather not lean the bike as much. At the end of the day I think the fastest rider will be the one who can master their riding technique and the bike’s ability on that particular track.
 
#7 ·
I guess this is true. But even today durin the practice sessions, the commentators kept refering back to "Ok here is Bradl, lets see how much lean angle he gets...". Basically really focusing on that. I wasn't sure exactly what affect it had on riding when some lean more than others.
 
#16 · (Edited)
I haven't read any of the other posts, so if this has been addressed, please forgive me :crash

Hondas may have more lean angle, but that equates to less corner speed...

You can't go as fast as you would in a straight line opposed to being leaned over right? :crash

Yamaha (well JL99 in particular) likes to keep the bike upright to maintain higher corner speed...

e.g. 64 degrees of lean may yield a max corner speed of 45mph, 54 degrees of lean may allow 55mph in that same corner. Other variables come into play like tire dimensions, riding style, engine crankshaft/drivetrain configurations, suspension geometry, etc. :dunno

The bottom line is, the less the bike is leaned over, the faster you can go. But steep lean angle can produce different lines on the track... It's a game of chess, not checkers :crash

MM93 hangs off the bike to keep the bike as upright as possible through a corner, if that makes any sense :dundun:
 
#19 ·
Oh and they always say the Yamahas like fast sweeping corners vs Honda are good at powering out if the corners. So if your on a Honda you can cut closer to the inside get more lean angle, then pick the bike up and take off? Does that sound right.


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