backing it in - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 51 (permalink) Old 09-29-2013, 01:14 PM Thread Starter
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backing it in

Can someone explain step by step what this means and how it's done?
I'm watching FP3 at Aragon and although I've heard the term a hundred times before, and see the rear tire almost stepping out, I still don't understand the concept or how they do it.

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post #2 of 51 (permalink) Old 09-29-2013, 01:36 PM
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In simple terms it is drifting the rear tire into the beginning of a turn.

It helps point the bike into a turn on the racing line chosen.


http://www.motorcyclenews.com/MCN/Ne...to-back-it-in/
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post #3 of 51 (permalink) Old 09-29-2013, 02:02 PM Thread Starter
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Well, that's exactly what I was asking. Thanks Kwtoxman!
I don't know if that's anything I'll be trying, looks pretty complicated. Lot's of things going on at the same time...

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post #4 of 51 (permalink) Old 09-29-2013, 02:04 PM
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I have seen you do this while riding jd9, not as exaggerated as you see the big boys do it but none the less same principle....but now you are scratching your head, how....

Loose gravel??



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post #5 of 51 (permalink) Old 09-29-2013, 02:17 PM
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It is not hard to do really, just need to be on top of things and in " the zone "...
My dad loves watching me go into a corner like a bat out of hell. LOL.

Having dirt in your history helps with reaction time and " feel ".

-2001 Honda RC51 sp1 " Slightly Modified "
-2001 Honda 929RR Erion Edition
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post #6 of 51 (permalink) Old 09-29-2013, 02:35 PM Thread Starter
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I have seen you do this while riding jd9, not as exaggerated as you see the big boys do it but none the less same principle....but now you are scratching your head, how....

Loose gravel??
Lmfao! that's a knee-slapper right there! Good humor rooted in truth, yeah?

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post #7 of 51 (permalink) Old 09-29-2013, 02:45 PM
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My question is, Is it the rear stepping out as the rear tire matches back up to the engine/transmission after downshifting or is it from rear braking? Maybe its both. I try to look closely at their brake foot when they are doing this (on TV) and most of the time it seems like they are not using rear brake as its sliding. I never touch my rear brake but have only felt the rear come loose if ever from heavy engine braking. Just curious, not like I'll ever be trying this on purpose anytime soon.

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post #8 of 51 (permalink) Old 09-29-2013, 08:07 PM
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IT is from downshifting, rev matching your shifts will prevent the rear wheel from breaking traction...

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post #9 of 51 (permalink) Old 09-29-2013, 08:21 PM
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Quote:
Originally Posted by Clutchless45 View Post
My question is, Is it the rear stepping out as the rear tire matches back up to the engine/transmission after downshifting or is it from rear braking? Maybe its both. I try to look closely at their brake foot when they are doing this (on TV) and most of the time it seems like they are not using rear brake as its sliding. I never touch my rear brake but have only felt the rear come loose if ever from heavy engine braking. Just curious, not like I'll ever be trying this on purpose anytime soon.
On a MotoGP bike, etc. things are quite different. They have electronics, slipper clutches and finely tunable traction control, all of which would help them do this kind of thing.

Although I've never tried it on the road (Only on dirt with a much lighter bike) I think backing it in is done using the rear brake primarily whilst there's a lot of weight transfer to the front. Seems to me - I wouldn't be able to accurately control partial locking with engine braking from not rev matching.

I don't have a slipper clutch and prefer rev-match every down change so there's no "sudden" engine braking. On a large capacity V-Twin like the RC51 - to make the rear tire need to grip and raise the engine revs by force is a lot to ask of it, especially when about to enter a corner under hard braking. No point in diminishing rear grip if it's not necessary - that's what rev matching will help us do (If you don't have a slipper clutch).

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post #10 of 51 (permalink) Old 09-30-2013, 12:09 PM
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You do it like this...


Dave

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