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RonXX · 02-21-2003, 10:42 AM

Sorry, but I feel the need to talk some smack. Your analysis of the situation is good for a static bike. Assuming that the bike is standing still, the sum of the forces on the ground (i.e. coefficient of friction times normal force, and torque applied divided by wheel radius) will equal zero. You are also correct in saying that the 'thrust' on the bike can never exceed that which is allowed by the amount of weight/traction that is available. It won't matter at all if power is distributed to the front or not because the friction produced will be the same. Where you go wrong is that assuming the max acceleration occurs when the bike begins to wheelie.

OK, picture this: an R1 that has the handlebars where the passenger seat is, and the crank rotates backwards. This would be a bike with a fat front tire with 100% of the power going to it. Yes, under acceleration the weight of the bike would be transferred to the rear somewhat, thereby decreasing the friction available for acceleration. However, this bike would never wheelie. Would it go down the 1/4 mile faster than a regular R1? Probably not. But the design in question here is with about 80% power to the rear, and 20% to the front. This would allow a rider to get a good start off the line with a decreased tendency to wheelie, while at the same time providing all the power when the front wheel has 20% of the weight on it. If you have ever seen a drag race you'll notice that the front wheel of a bike with a good rider on it will only come up for a short distance during the race. Unless it is a top fuel dragster, any bike will run out of power to keep the front end in the air after a few seconds (unless it is done intentionally).

I think the issue here is whether or not a 2WD system will help prevent wheelies on sportbikes, and I think the intuitive and correct answer is 'yes'.

SeanAlexander · 02-22-2003, 04:59 PM

CAN be the limiting factor, but in general, once the tires are warm, traction isn't a big problem, wheelies are.

The_AirHawk · 02-15-2011, 03:13 PM

Really? Did it ever tell you how to Go To Hell, SPAMmer?

targetinthebox · 03-07-2011, 09:45 PM

I violently disagree with what you just said.

02-21-2003, 10:42 AM	#31
RonXX Founding Member Join Date: Nov 2001 Posts: 273	Re: No and no Sorry, but I feel the need to talk some smack. Your analysis of the situation is good for a static bike. Assuming that the bike is standing still, the sum of the forces on the ground (i.e. coefficient of friction times normal force, and torque applied divided by wheel radius) will equal zero. You are also correct in saying that the 'thrust' on the bike can never exceed that which is allowed by the amount of weight/traction that is available. It won't matter at all if power is distributed to the front or not because the friction produced will be the same. Where you go wrong is that assuming the max acceleration occurs when the bike begins to wheelie. OK, picture this: an R1 that has the handlebars where the passenger seat is, and the crank rotates backwards. This would be a bike with a fat front tire with 100% of the power going to it. Yes, under acceleration the weight of the bike would be transferred to the rear somewhat, thereby decreasing the friction available for acceleration. However, this bike would never wheelie. Would it go down the 1/4 mile faster than a regular R1? Probably not. But the design in question here is with about 80% power to the rear, and 20% to the front. This would allow a rider to get a good start off the line with a decreased tendency to wheelie, while at the same time providing all the power when the front wheel has 20% of the weight on it. If you have ever seen a drag race you'll notice that the front wheel of a bike with a good rider on it will only come up for a short distance during the race. Unless it is a top fuel dragster, any bike will run out of power to keep the front end in the air after a few seconds (unless it is done intentionally). I think the issue here is whether or not a 2WD system will help prevent wheelies on sportbikes, and I think the intuitive and correct answer is 'yes'.

02-22-2003, 04:59 PM	#32
SeanAlexander Founding Member Join Date: Nov 2001 Location: Newport Coast, CA Posts: 1,538	Re: Yamaha's 2 Wheel Drive CAN be the limiting factor, but in general, once the tires are warm, traction isn't a big problem, wheelies are. __________________ I thought I'd found true happiness in my personal bath body bar.... Then I tried DOVE! with 1/4 moisturizing cream!!!

02-15-2011, 03:13 PM	#33
The_AirHawk Founding Member Join Date: Jun 2007 Location: Livin' in a Van: down by the Mariana Trench Posts: 10,891	Really? Did it ever tell you how to Go To Hell, SPAMmer? __________________ *Parfois, on fait pas semblant* Sometimes, it's not pretend Oderint Dum Metuant Let them hate so long as they fear политики предпочитают безоружных крестьян Politicians Prefer Unarmed Peasants Nothing to see here, Citizen. Move along now...

03-07-2011, 09:45 PM	#34
targetinthebox Registered Member Join Date: Mar 2011 Posts: 1	I violently disagree with what you just said. __________________ AfterMarket Fairings Motorcycle Fairings free shipping Motorcycle Parts

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