March 28th, 2017, 10:41 AM | #41 |
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What part of took off the heavy street parts on his racebike did you miss?
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March 28th, 2017, 11:46 AM | #42 |
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Depends on who you ask. This source http://www.motorcycle-usa.com/30215/...ki-ninja-250r/
says that the dry weight of a newgen 250 is 374 lbs. All I know is that the R6 feels really light in track trim.
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March 28th, 2017, 04:07 PM | #43 |
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What are the main heavy parts that have been replaced to make it a 'track' bike?
Yeah, different sources often have different power output and weight specs for reasons I do understand. I'm assuming the list of 'track' related weight mods are... fiberglass tail/nose fairings that don't have lights no mirrors either rearsets and various other small aftermarket (slightly lighter) components no kickstand and other minor things of that nature Am I missing anything major? Thanks dude.
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March 28th, 2017, 04:15 PM | #44 |
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That's pretty much it, but there are one or two other things.
For example, I replaced the ignition switch with a key switch eliminator. Heavy chunk of metal, that. My track bike also has a full titanium exhaust. The previous owner didn't skimp. The whole front fairing/light thing is a lot of the weight savings. I actually added the kickstand back in, because I'm really short and the R6 is really tall. No way for me to throw a leg over while also holding the bike up.
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March 29th, 2017, 04:49 PM | #45 | |
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Quote:
A strain gauge measures force between two items by measuring voltage change with deflection. Maybe you're thinking of that? |
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March 29th, 2017, 06:21 PM | #46 |
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^^^ yeah I may have used the wrong term.
Here we go... 130 bucks on amazon with free delivery and batteries included. I should have titled the thread "easiest way to weigh motorcycle"
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March 29th, 2017, 07:54 PM | #47 |
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Only usable when you have some place strong enough to hang that scale.. plus weight of bike.. and rope that is strong enough.
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March 29th, 2017, 08:27 PM | #48 |
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That's a nice scale. Rope good for 1,500 lbs or so is cheap. You do need something else like a block and tackle and a tree limb, or a 4x4 across a couple garage roof truss 2x4s though.
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March 29th, 2017, 09:02 PM | #49 |
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I believe you cannot weigh the front then the back and add them up, even on a level plain.
Both points need to be on one scale. Look up advanced rigging formula's, there may be some help there. |
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March 29th, 2017, 09:16 PM | #50 | |
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Obviously if something else is touching the floor, like a side stand, its force would also have to be measured and added to the total. You can check this by standing on two bathroom scales, one foot on each. The total will be the same, within scale accuracy, as putting both feet on one of them. |
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March 29th, 2017, 11:15 PM | #51 | ||
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Quote:
Quote:
All of this is very interesting. I think hernan nailed it with these pictures. Thanks guys!
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March 30th, 2017, 02:36 AM | #52 |
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March 30th, 2017, 06:19 AM | #53 | |
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Quote:
Of course bathroom scales can be off a couple pounds out of 150, so for the numbers to add up correctly, the scales must be correct, or at least be off the same amount. |
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March 30th, 2017, 10:02 AM | #54 |
Certifiable nontundrum
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Did y'all ever settle out the fancy talk; if so what conclusion was settled on? Barney style please
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March 30th, 2017, 11:06 AM | #55 |
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You can weigh a motorcycle by weighing one wheel at a time, if you balance it upright (not on side stand). It will be a little more accurate if you use something to make the wheel that's not being weighed the same height above the floor as the scale surface.
If you have two scales, you can put one tire on each, balance the bike upright, and add the two weights. Heck, if you have three scales, you can put the front tire on one, the rear tire on another, and the side stand on the third one, and add all three. In the multiple scale cases, they don't even all have to be the same height, since the whole motorcycle is being weighed at once. |
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March 30th, 2017, 11:07 AM | #56 | |||
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Quote:
Quote:
Quote:
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March 30th, 2017, 11:32 AM | #57 |
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Excellent about the excavator. I was speaking generically for others who may be interested in using a scale like the one in the post above.
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March 30th, 2017, 05:18 PM | #58 |
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March 30th, 2017, 11:13 PM | #59 |
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I ordered a few pieces of nylon webbing for rigging the bike to a crane or other similar overhead lift point. I still cannot justify the cost of a scale because this is a personal project [expense] that won't generate any income.
I guess at this point... the question is.... How to hook up secure lift point near back tire of motorcycle. Obviously I could use a sling on the handle bars and that would work for the front. It's a tricky question because all bikes are different. All bikes have some degree of frame through the rear tail section, but the configuration is different from one bike to the next. Maybe I need a rectangular shipping pallet with lift points at all four corners so I could simply roll the bike[s] onto the shipping pallet and weigh them via crane scale, and then subtract the weight of the rigging/pallet for an accurate measurement. The saga continues. Hopefully this is mildly entertaining to read because the whole project is starting to feel like a chore. Thanks for everyone's help so far.
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March 31st, 2017, 06:01 AM | #60 | ||
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Quote:
Better lift method would be looping a strap below the lower triple clamp or under the steering headtube of the frame to avoid handlebar completely. For rear section of the bike, best to lift from rear axle or swing arm where by design are meant to support the weight of the bike + rider. Quote:
Is it that difficult to find a weight station locally? |
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April 1st, 2017, 11:55 PM | #61 |
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^^^ Good post.
Maybe I didn't use the right words when I was typing via on-screen keyboard and clicking on each individual letter to type. The number displayed by the scale is 560. We can presume that's 560lbs. Scales of that nature are typically only accurate in 20lb increments. That means that the bike in the picture weighs somewhere between 551 and 569lbs. The weight of the bike could vary between 550 and 570lbs which is not accurate enough to account for different wheel/tire combinations. If the bike weighed in at 571lbs, the scale would read 580. If the bike weighed in at 549lbs, the scale would read 540. We all know that street tires vs dirt tires vs dual-sport tires massively affect the handling characteristics of a bike. In simple terms, a scale of that type is not designed for the precision required to weigh motorcycle. It says on the sign..... "Vehicles over 5 tons." That's 10,000lbs. This is no different than the proper use of a torque wrench. A typical torque wrench is only accurate between 20 and 80% of it's range. If a torque wrench is advertised with a usable range of 1-100ft/lb, it is only guaranteed to be "accurate" [by the manufacturer] between 20 and 80ft/lb. If you use a torque wrench rated for 100ft/lb to torque a fastener to 95ft/lb, it will be out of the specified range and may sheer [break] or stretch the fastener. Same for using a torque wrench rated for 100ft/lb to torque a fastener to 5ft/lb. It may under or over torque the fastener between 1 and 20ft/lb while giving a false [inaccurate] reading. That scale is not designed to weigh motorcycle and is not precise enough. Good enough for the govn't, sure. Good enough for me, nope.
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April 2nd, 2017, 06:31 AM | #62 |
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Someone in the scale calibration business would know, but they may be set up to truncate, not round. So 560 may mean 560 to 579, for example.
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April 2nd, 2017, 06:45 AM | #63 | |
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Personally, I rather enjoy riding a bike than risking damaging it to find out how much it weighs. |
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April 2nd, 2017, 06:52 AM | #64 |
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@corksil have you been able to properly weigh your bike and get an accurate weight? Interested to see how much it weighs.
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April 2nd, 2017, 10:40 PM | #65 | ||
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I thought I was the smartest guy on the planet. Now I'm not sure. Quote:
Back to the hanging pallet idea. @Snake -- no, I still haven't weighed bike. In my particular county, vehicle registration cost is calculated by weight. Makes sense, as heavier vehicles would theoretically do more damage to the roads, thus having higher tax rates to generate income for the repair of roads. It would be nice to know the weight of my bike[s]. There are more than a few. Most rarely ridden. Yet with yearly fees attributable to their weight. If one or ten of the bikes are grossly mis-labelled in terms of weight, it would behoove me to have them re-weighed to lower the cost of the annual fee for having a license plate. ^^^ Did you see wut I did there? I usered the word "grossly" in a double meaning. Spoiler for Wizardry and deductive reasoning!:
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April 3rd, 2017, 08:49 AM | #66 |
Guy Who Enjoys Riding
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I suppose one could prove rounding or truncation with a 35 lb weight.
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