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Puzzled
| Posted on Monday, July 07, 2008 - 01:51 pm: |
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What is the tooth count on the front and rear pulleys? What do you guys think of a "gear" change to increase the top end? These bikes have tremendous low end, can they afford to give some up in favor of top end? (posted on buelletinboard.com also) |
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Puzzled
| Posted on Monday, July 07, 2008 - 02:05 pm: |
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Stock is 70/27 which is 2.593:1 A 70/28 would be 2.50:1 A 70/29 would be 2.41:1 A 70/30 would be 2.33:1 1 tooth change on the pulley moves the axle approximately .125" 1 tooth change on the belt moves the axle approximately .280" Now to figure out the MPH difference. |
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Puzzled
| Posted on Monday, July 07, 2008 - 05:16 pm: |
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A 70/28 would be 2.50:1 +6 MPH approximately A 70/29 would be 2.41:1 +12 MPH approximately A 70/30 would be 2.33:1 +18 MPH approximately Now to figure out if the bike can handle .26 of gear change. |
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Pizzaboy
| Posted on Monday, July 07, 2008 - 08:29 pm: |
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is 170 not fast enough for you?? |
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Puzzled
| Posted on Monday, July 07, 2008 - 08:37 pm: |
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That is plenty fast for me. I have not seen any reports of the bikes actually hitting 170 though. Low 160's seems to be average. I'm just thinking a little outside of the box here, don't mind me. I'm coming off of a Turbo Hayabusa that flew like a rocket and turned like a tractor! |
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Pizzaboy
| Posted on Monday, July 07, 2008 - 08:52 pm: |
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you havent tried to get to the rev limiter on yours??? i keep trying to get past 160 but i get scared. i still have a few hundred rpms left when im there. i personally wouldnt mind having it the OTHER way. i certainly dont need to go even 140. it would be cool to be further geared down and then be able to play the 'how many wheelies can you do on your way to work' game aand get a higher personal best score than i have at the moment |
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Puzzled
| Posted on Monday, July 07, 2008 - 09:16 pm: |
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LOL I need to be able to hang with the metrics on the interstate. My area is an artery for major interstates, not that I'd break the speed limit! |
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Pizzaboy
| Posted on Monday, July 07, 2008 - 10:39 pm: |
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ah! there is something about the literbikes' ability to do 180 that is pretty cool. even if i had one, i still wouldnt be able to find the max speed. it will take me another year before i find the balls to find 170 |
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Diablo1
| Posted on Monday, July 07, 2008 - 10:46 pm: |
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From the MCN test, the bike pulls 157.7 mph in top gear. It lacks the power to go faster, not the gearing. Taller gearing would only make it accelerate slower and reduce the max speed. }Measured top speed - 157.7 mph 0-1/4 mile - 10.51 sec @ 134.32 mph 0-60 - 3.15 sec 0-100 - 6.47 sec Dyno 126.9 hp/70.8 lb.-ft } |
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Pizzaboy
| Posted on Monday, July 07, 2008 - 10:56 pm: |
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the 1125r certainly lacks the HP that the literbikes have, so i could agree that it would be more difficult for this bike, even with different gearing, to get to 180. nonetheless my fastest speed on the 1125 so far is 155mph, and it felt like it had more than just 2mph left in it. it certainly had more RPM's available. it was not accelerating as fast at this speed, but it was definitely still accelerating. some of that could have to do with the fact that its only pulling my scrawny 145lb ass as opposed to someone say 200lbs. |
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Puzzled
| Posted on Monday, July 07, 2008 - 11:17 pm: |
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quote:From the MCN test, the bike pulls 157.7 mph in top gear. It lacks the power to go faster, not the gearing. Taller gearing would only make it accelerate slower and reduce the max speed.
In my best Captain Kirk voice....Scotty we need more power. |
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Puzzled
| Posted on Monday, July 07, 2008 - 11:19 pm: |
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I had asked in another thread about go-fast goodies for the 1125R's. You know just for conversation sakes. ![; )](http://www.badweatherbikers.com/buell/clipart/winker.gif) |
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Jpfive
| Posted on Tuesday, July 08, 2008 - 12:01 am: |
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Top speed at the rev limiter on my dyno run was 164.9 mph in sixth gear. 157.7 was a measured top speed in the MCN test, another test (Cycle World?) measured 161. Who knows where or why they cut it off, in either test. Maybe there was some more left. At any rate, the dyno shows the most it can theoretically do with the stock gearing. Jack P.S. I'm happy with the top end. I bought the bike expecting it to be an honest 160 mph bike. It seems to be there. |
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Puzzled
| Posted on Tuesday, July 08, 2008 - 05:53 am: |
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This is all good information. My research will lead me next to power to weight figures. I have no doubt that Buell has this bike figured out to run very close to its peak performance. I'd like to know if it were a few pounds lighter, or if it had a little more power what it is capable of doing. |
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Jpfive
| Posted on Tuesday, July 08, 2008 - 07:35 am: |
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From the MCN test: Wet Weight - 465.5 lbs, Power to Weight Ratio - 1:3.66 |
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Puzzled
| Posted on Tuesday, July 08, 2008 - 08:15 am: |
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Not quite what I'm after.... How much much power does it take to move X amount of weight at X speed? There are some decent calculators out there that make this stuff easy. 465 wet! That sure is a far cry from the 375 published dry weight. It is a little tough to believe there is 90 pounds in fluids in the bike. 5.3 (specs on Buell site) or 5.6 gallons (intro on Buell site)of gas? 3 quarts of oil. ? of antifreeze Brake fluid |
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Rfischer
| Posted on Tuesday, July 08, 2008 - 09:17 am: |
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The issue is aero-drag, not weight. More power is required to overcome the block of air the bike is pushing. A larger rider simply accentuates the issue, but not so much because of weight, rather drag. The larger fairing the 1125R employs is also likely affecting top-speed, but I don't know what it's CD is. I suspect a small rider with a smaller fairing [frontal area] and a bit of fairing to the seat tail would get the bike on the limiter in 6th. |
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Slaughter
| Posted on Tuesday, July 08, 2008 - 01:26 pm: |
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Trust me - these machines can't use more top speed on racetracks that I'm aware of. Most folks gear the bikes DOWN for road racing to get better ACCELERATION. Most folks can't get close to top RPM in top gear and UNUSED RPM's = bad acceleration. If you're heading to Bonneville, Blackrock or El Mirage, you will have different needs but all those places allow a mile or more to accelerate. Top speed really doesn't hardly have a thing to do with weight but with drag (as others have mentioned) Smaller fairing won't help - maybe more fairing BEHIND the rider to help in pressure recovery - but now you're messing with cooling efficiency and a whole lot of other stuff. Interesting thinking about it though. |
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Bobup
| Posted on Tuesday, July 08, 2008 - 03:04 pm: |
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at the ASBN meeting last night, Rex had given us a rundown of homecoming.....AND.... that BMC will be releasing around 300 "racing" parts for the 1125R ECM, heads, exhaust, etc, etc. sound like more power and going faster is within easy reach (if you have a racing license) |
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Chadhargis
| Posted on Tuesday, July 08, 2008 - 03:56 pm: |
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I'll have a racing license in September (assuming I pass the course). I'll order you some parts. ![: )](http://www.badweatherbikers.com/buell/clipart/happy.gif) |
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Puzzled
| Posted on Tuesday, July 08, 2008 - 05:24 pm: |
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Sounds like I'll need to look into acquiring a racing license. Does my 9 sec drag license count? |
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Slaughter
| Posted on Tuesday, July 08, 2008 - 06:02 pm: |
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You don't want to get your race-only parts on a streetbike and get found out. You'll be cut-off and your dealer will receive a pretty nasty letter. Trust me, there are very few Harley dealers who take kindly to receiving a strongly worded letter from Corporate. It has happened before. IF you are using the parts for drag racing, there's no reason that you can't get race only hardware (at least no reason that I can think of). Remember, your dealer is assuming the risk in selling you the parts for racing that might end up being used for street. I'm just an end user/racer but kinda know what the restrictions are. |
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Diablo1
| Posted on Tuesday, July 08, 2008 - 06:59 pm: |
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You don't want to get your race-only parts on a streetbike and get found out. You'll be cut-off and your dealer will receive a pretty nasty letter. Trust me, there are very few Harley dealers who take kindly to receiving a strongly worded letter from Corporate. It has happened before. So, what's the matter with HD/Buell? Don't they care to compete with the other brands? If HD hasn't noticed, there is no shortage of racing parts available for other sport motorcycles. Plenty of folks use racing parts on their track bikes as well as street bikes.} |