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#743826 - 11/27/11 09:58 AM Question: RT end-over  
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Robus Offline
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Has anyone ever heard of an RT doing an end-over under heavy breaking?

Theoretically it must be possible as there are stories of riders experiencing a "stoppie." If the breaking force is enough to cause the rear wheel to rise at all, then it could end-over under the right (wrong) circumstances. That same force if maintained will cause the rear wheel to continue to rise and actually at an accelerating rate as the center-of-gravity gets higher and the wheel base shorter. But in the stories I've heard the bike runs out of energy and comes to a stop before that happens, with the rear tire plopping back down from a height of a few inches to a foot or so.

Also, is the ABS on late-model RTs designed to counteract a "stoppie?"

Thanks.

#743837 - 11/27/11 12:58 PM Re: Question: RT end-over [Re: Robus]  
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Rich06FJR1300 Offline
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not sure, the brakes are linked so it may be pretty hard to do a stoppie.


2006 Yamaha FJR1300 2002 Silver R1150rt IBA SS1000 (minuteman rally) Former Club Secretary Skylands NJ BMW Riders
#743838 - 11/27/11 01:02 PM Re: Question: RT end-over [Re: Robus]  
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10ovr Offline
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I have had the rear wheel off the ground 2 or 3 inches on my 07 RT (very hard braking)but then the ABS kicks in and the bike settles ,To go all the way over is not going to happen,,,

#743850 - 11/27/11 02:08 PM Re: Question: RT end-over [Re: Robus]  
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dirtrider Offline
The Oracle
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Originally Posted By: Robus


Also, is the ABS on late-model RTs designed to counteract a "stoppie?"



Morning Robus

The late BMW ABS-2 & I-ABS & I-ABS Gen-2 systems have an algorithm to prevent excess rear wheel lift. It works pretty crudely on the older ABS-2 systems with the front brake abruptly releasing when you don't expect it.

The I-ABS & Gen-2 works a lot smoother and is a lot more refined so a rider really has to play hard to get it to kick in to a level that is noticeable.

You can get a bit of a stoppie on all of them as the response isn't fast enough to totally prevent rear wheel lift if the brakes are applied harshly & quickly with great force. The rear wheel lift won't be very high & for very far but you CAN lift the rear wheel if you try hard enough.


D.R. ___
Sent from my rotory dial wall phone!
#743984 - 11/28/11 03:54 AM Re: Question: RT end-over [Re: dirtrider]  
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malcolmblalock Offline
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Which system would be on an 09 RT? Just curious....


Have fun when you can; life is short...

09 1200 RT Beautiful Black; 01 R 1200 C Phoenix; 05 1200 RT (Sold)
#744005 - 11/28/11 01:05 PM Re: Question: RT end-over [Re: Robus]  
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RoadWolf Offline
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Yep... I have seen it first hand on a demo ride back in 2003 at the MOA Rally in Charleston WV. A heavy set guy was demoing a R1150RT, came to a stop light that had just split the group into to, he grabbed a handful of front brake and up he went... I always wondered what the underside of an RT looked like.... now I know. He was fine, but the first thing out of his mouth was... "What the $%^& is with these brakes!" Obviously he wasn't attuned to the Servo Assisted brakes of that era. My wife and I were demoing a LT at the time and I worried what she would say knowing that my bike at the time WAS a 2002 R1150RT.


2017 R1200GSA Triple Black
#744010 - 11/28/11 01:48 PM Re: Question: RT end-over [Re: malcolmblalock]  
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dirtrider Offline
The Oracle
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Originally Posted By: siman00
Which system would be on an 09 RT? Just curious....


Morning siman00

Your 09RT has the I-ABS_Gen2 system.


D.R. ___
Sent from my rotory dial wall phone!
#744054 - 11/28/11 05:36 PM Re: Question: RT end-over [Re: dirtrider]  
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malcolmblalock Offline
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dirtrider, thanks. I thought so, but wasn't sure.


Have fun when you can; life is short...

09 1200 RT Beautiful Black; 01 R 1200 C Phoenix; 05 1200 RT (Sold)
#744180 - 11/29/11 09:02 AM Re: Question: RT end-over [Re: RoadWolf]  
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Robus Offline
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Originally Posted By: RoadWolf
Yep... I have seen it first hand on a demo ride back in 2003 at the MOA Rally in Charleston WV. A heavy set guy was demoing a R1150RT, came to a stop light that had just split the group into to, he grabbed a handful of front brake and up he went... I always wondered what the underside of an RT looked like.... now I know. He was fine, but the first thing out of his mouth was... "What the $%^& is with these brakes!" Obviously he wasn't attuned to the Servo Assisted brakes of that era. My wife and I were demoing a LT at the time and I worried what she would say knowing that my bike at the time WAS a 2002 R1150RT.


Thanks for the replies. So this guy did go all the way over?

#744188 - 11/29/11 12:01 PM Re: Question: RT end-over [Re: Robus]  
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RoadWolf Offline
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Yep, he went straight over the handlebars. I was surprised he got up as quickly as he did. I think his ego was hurt more than anything physically hurt.


2017 R1200GSA Triple Black
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