Sub 400lb RC - Honda RC51 Forum : RC51 Motorcycle Forums
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post #1 of 33 (permalink) Old 06-10-2012, 02:20 AM Thread Starter
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Question Sub 400lb RC

Being new to RC i have recently been doing a lot of reading. Browsing through old thread's and reading reviews and such.
The new crop of current liter bikes are typically sub 400lb. And after a couple hundred miles on my (new to me) 06 i cant help but imagine how badass it would be if it dropped 30-40lb.
So i pose this question to the forum...what, and how much $$ gets it done

In the snowmobile world its about $100 a pound(carbon fiber skid $2500=30lb weight loss)

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post #2 of 33 (permalink) Old 06-10-2012, 02:39 AM
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The basic racer weighted in at 384.xx dry, it was also like 100k too lol

2001 rc51 upgraded

1999 vtr 1000 "superhawk" sold

2006 650R Ninja sold
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post #3 of 33 (permalink) Old 06-10-2012, 03:42 AM
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Well for starters you can replace your entire exhaust system with a a lady bird TI set up, its on ebay right now also sold on this forum and speedzilla. That should drop you prolly 20 lbs maybe more Im not completely sure. THen throw on some BST wheels that will drop you another 15lbs and that big drop... from there just start chopping shit thats not needed. I can imagine you get down around the 420lb range with some minor changes... QB carbon tank or ETI fuel cell will help too along with a few other carbon parts turn one snorkel and air box (moriwaki if u use the fuel cells). After that tho the dollar per pound gets VERY expensive!
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post #4 of 33 (permalink) Old 06-10-2012, 05:43 AM
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The two following posts from Speedzilla might help (I bookmarked them while researching the topic; can always try running a search on that msg board, as well as here - g'luck!):

http://www.speedzilla.com/forums/598735-post11.html

http://www.speedzilla.com/forums/149776-post21.html

'06 Black/Metallic Gray RC51
-Competition Werkes FE w/
Clear Alternatives IT

'02 Silver/Black CBR 954RR
'11 Graphite Black CBR 1000RR (sold '15)
'08 Pearl Orange CBR 600RR (sold '11)
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post #5 of 33 (permalink) Old 06-10-2012, 09:41 AM
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Start by losing weight in large chunks, because the price goes way up when losing weight in small amounts.

Wheels, fuel tank, battery, exhaust will lose a bunch of weight.
An ETI fuel cell, Shorai battery, TurnOne airbox and snorkel, and full Ti exhaust system can lose around 30 lbs alone.

BST wheels will lose several pounds more, but most importantly they will lose rotating and unsprung mass.
This will greatly improve handling and also suspension operation.

A lightweight rear brake rotor can save a pound or two.

Titanium is 40% lighter than steel, but I've found greater weight savings between steel and titanium for larger bolts than with smaller bolts, mostly due to the shapes of the bolts replaced.
You can substitute aluminum bolts in non-stressed areas as well.

The engine is the absolute heaviest component of the bike (next to the rider) at around 165 lbs.
There is nothing you can do to lose substantial weight on the engine.
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post #6 of 33 (permalink) Old 06-11-2012, 12:46 PM
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Not sure about the current litre bikes coming in at 'under' 400#. The Kawi ZX10 is reported as 436# curb, and the Honda CBR is a porky 465#, actually heavier than it was previously. Didn't check on the Yam or Suzi though. Maybe the Ducs and Aprilias might be closer. Ditto on what Sub says about the exhaust and wheel for the biggest quick weight savers. Reducing insprung weight is always one of the best noticeable gains you can make to anything. For me though, loosing 20+ lbs off myself would likely benefit both me and the bike

Duct tape can't fix stupid...but it sure helps muffle the sound
'03 SP2, '09 GL1800
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post #7 of 33 (permalink) Old 06-11-2012, 03:00 PM
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I already have a sub-400lbs RC51






I'm always right.

2011 Bike of the Year
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post #8 of 33 (permalink) Old 06-11-2012, 04:16 PM
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Wow, I can't lose anywhere near that amount of weight by being nekkid

Duct tape can't fix stupid...but it sure helps muffle the sound
'03 SP2, '09 GL1800
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post #9 of 33 (permalink) Old 06-11-2012, 04:22 PM
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Quote:
Originally Posted by b.miller123 View Post
I already have a sub-400lbs RC51

Is that methane powered B? Lol


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2001 rc51 upgraded

1999 vtr 1000 "superhawk" sold

2006 650R Ninja sold
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post #10 of 33 (permalink) Old 06-11-2012, 06:32 PM
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Quote:
Originally Posted by TORQUEDORK View Post
And after a couple hundred miles on my (new to me) 06 i cant help but imagine how badass it would be if it dropped 30-40lb.
So i pose this question to the forum...what, and how much $$ gets it done

Used Ducati 848 $6500 makes the same horsepower as an RC51 and weighs 72lbs less
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