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Jul 22nd, 2007, 02:19 PM
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#1 | | Very Active Poster 50+
Join Date: Jul 2007 Location: Brooks, Alberta. Canada
Posts: 53 Model: 2008 Road King Classic Interests: Reading, Riding and the New Orleans Saints! Occupation: Oil battery operator
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I've noticed that the bigger the engine the heavier the bike. Was just curious as to how this played out as far as bike acceleration.
John | 
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Jul 22nd, 2007, 04:11 PM
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#2 | | Moderator Has posted 500+
Join Date: Jul 2005
Posts: 4,560
| well, the heaver the bike the slower it is going to be. more hp/torque is required to get the bike moving. im not sure of your question, but hope this helps. | 
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Jul 22nd, 2007, 04:13 PM
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#3 | | Moderator Has posted 500+
Join Date: Jun 2004 Location: San Antonio, TX
Posts: 1,139 Model: 2004 E Glide Standard, Stage 1. Interests: Riding, fishing, hunting, camping, spending time with wife and daughter Occupation: Air Force Nurse
| In many cases, bigger engine heavier bike...this can be true due to a couple thiings...engine must be physically larger, therefore heavier....I also feel that many times this is due to bigger frame (cruiser/tour bike).....comfort is the key. The bigger metric race bikes such as CBR, Ninja and others are some heavier, but not as big of a difference..... The key I feel is the kind of GEARING that they do for the bike. HD will be geared like the average John Deere Tractor.....lots of torque, not so much on the high end....then the sport bikes....high speed gearing, lower torque.... All of this effects acceleration. | |
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Jul 22nd, 2007, 05:21 PM
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#4 | | Very Active Poster 50+
Join Date: Jul 2007 Location: Brooks, Alberta. Canada
Posts: 53 Model: 2008 Road King Classic Interests: Reading, Riding and the New Orleans Saints! Occupation: Oil battery operator
| What I was getting at was in my line of bikes for instance mine is just about the smallest crusier and weighs in at 558 lbs. The biggest cruiser that they offer is way heavier ( I think about 800 lbs) but of course has a way bigger engine, with quite a few sizes in between. I just wondered if you put every one of these bikes at a starting line and raced them all up to highway speed how it would shake out.
John | |
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Jul 22nd, 2007, 07:21 PM
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#5 | | Moderator Has posted 500+
Join Date: Jul 2005
Posts: 4,560
| im just guessing here...but i believe the lighter bikewill win the drag.....to a certain point. at that point the larger engines may catch up then pass the lighter bike, as they have overcome the extra weight. the gearing is going to be different between the bikes also. the cruisers will be able to sustain the higher speeds longer than the lighter ones, and be a lot more comfortable doing it.....in nhra drags....different classes that include weight and hp. the racers try to keep the hp at the top end of the class, while keeping the weight at the lower....hope this helps a bit...... | |
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Jul 28th, 2007, 12:51 PM
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#6 | | Has posted 500+
Join Date: Apr 2006 Location: Charlotte, NC
Posts: 1,087 Interests: Anything outdoors (climbing, backpacking, fishing, Mtn biking, riding) Occupation: Chemistry teacher
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I agree w/ Chuck... By the way... Nice Avatar... Where'd you find her???  | |
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Jul 28th, 2007, 02:13 PM
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#7 | | Moderator Has posted 500+
Join Date: Jul 2005
Posts: 4,560
| mwelych, she was hangin round the ranch lookin to rodeo!!!!!  | |
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Jul 28th, 2007, 02:52 PM
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#8 | | Has posted 500+
Join Date: Dec 2006 Location: Stanton, NJ
Posts: 1,298 Model: 04 Dyna WG (with a 240 rear tire) Interests: Harleys, drag racing, family, fishing, my rottweilers, the UFC Occupation: Carpenter/Builder
| I got a pole she can swing on............   | |
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Jul 28th, 2007, 10:10 PM
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#9 | | 200+ posts and climbing
Join Date: Aug 2004
Posts: 358
| Quote:
Originally Posted by jturuk  What I was getting at was in my line of bikes for instance mine is just about the smallest crusier and weighs in at 558 lbs. The biggest cruiser that they offer is way heavier ( I think about 800 lbs) but of course has a way bigger engine, with quite a few sizes in between. I just wondered if you put every one of these bikes at a starting line and raced them all up to highway speed how it would shake out.
John | The simple answer is power to weight ratio.
Let's say the smaller engine has 70 hp, 70/558 equals o.125hp/lbs
The bigger engine would have to have over 100 hp to match the smaller one in a drag race.
There are a lot of other things like wheel size and gearing, but mostly you should go by power to weight for a closer guess. | |
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