RC51 Weight Reduction Results / Ideas - Honda RC51 Forum : RC51 Motorcycle Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 17 (permalink) Old 05-13-2010, 07:43 PM Thread Starter
Senior Member
 
Join Date: Jun 2009
Posts: 170
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
RC51 Weight Reduction Results / Ideas

I've seen this question asked quite a few times, so I figured it wasn't a bad idea for people to post up what they've done to reduce the weights on their RC51s. I've got two SP2 RC51s, both 2002, one for street and one track. Wet weight of SP2 is 483, SP1 was 10lbs more, I think most weight diff was in exhaust, wheels, swingarm and subframe.

Street one is mostly stock, I figure I've taken 30lbs off, so it's 453 with the tank full. Main weight loss items are Jardine 2:1 exhaust (-15 lbs), speedcell-type battery (-6), 3-spoke CBR wheels (-1.5), Vortex clipons (-2), 520 conversion (-1) and aftermarket signals/bodywork/undertail (-3). Don't really want to drop anymore weight on it, but if I did then wheels or airbox would probably be the most cost effective.

Track bike should be at 420 with a full fuel tank, so most track days I'm riding around with the tank half full and weighing under 410. I haven't done everything, but dropping anymore weight is going to start getting seriously expensive, so here's the detailed list:
  • 2-1 full exhaust (-15)
  • Relocated speedcell-type battery (-7)
  • PVM 5Y forged aluminum wheels (-9)
  • CF airbox & intake (-7)
  • Vortex clipons (-2)
  • Track trim: no lights, signals, horn, ignition, mirrors, radiator fans, pass pegs, tool kit, kickstand, w/keyless gas cap (-16)
  • Pair/flapper (-2)
  • 520 conversion / aluminum rear sprocket / aftermarket rear rotor (-2.5)
  • Race subframe & wire harness (-2.5)
  • Race bodywork & superbike tail / foam seat (-5)
  • Scotts damper, PC3, frame sliders (+5)


What has everyone else done?

Last edited by watskooo; 05-13-2010 at 07:44 PM. Reason: spelling
watskooo is offline  
Sponsored Links
Advertisement
 
post #2 of 17 (permalink) Old 05-13-2010, 09:29 PM
Moderator
 
SubSailor's Avatar
 
Join Date: Oct 2008
Location: Sarasota, FL
Posts: 6,467
Mentioned: 24 Post(s)
Quoted: 89 Post(s)
So far:
Marchesini forged AL wheels
Akrapovic full system
Galfer rotors front and rear
Magnesium clip-ons
Carbon/kevlar fuel tank (when painting finished)
Fiberglass airbox
Turn-Tech battery
Pair/flapper mods
Titanium exhaust hangers
Titanium fasteners and link bolts

Last edited by SubSailor; 05-13-2010 at 09:41 PM.
SubSailor is offline  
post #3 of 17 (permalink) Old 05-14-2010, 01:20 AM Thread Starter
Senior Member
 
Join Date: Jun 2009
Posts: 170
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by SubSailor View Post
So far:
Carbon/kevlar fuel tank (when painting finished)
Fiberglass airbox
Titanium fasteners and link bolts
Good stuff! Any ideas how much weight some of those items saved?

Are you running the Thorsten/TurnOne airbox? If so which carbon/kevlar fuel tank did you find to work with it? I've looked a couple places, but haven't really ever found too many Ti fasteners left over for the RC.
watskooo is offline  
 
post #4 of 17 (permalink) Old 05-14-2010, 10:38 AM
Senior Member
 
Join Date: Jul 2008
Location: Dallas
Posts: 863
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
I just went to the gym and shaved a ton of weight.
jgos929 is offline  
post #5 of 17 (permalink) Old 05-14-2010, 07:01 PM
Moderator
 
SubSailor's Avatar
 
Join Date: Oct 2008
Location: Sarasota, FL
Posts: 6,467
Mentioned: 24 Post(s)
Quoted: 89 Post(s)
Quote:
Originally Posted by jgos929 View Post
I just went to the gym and shaved a ton of weight.
Well that's no fun at all...
SubSailor is offline  
post #6 of 17 (permalink) Old 05-14-2010, 07:07 PM
Moderator
 
SubSailor's Avatar
 
Join Date: Oct 2008
Location: Sarasota, FL
Posts: 6,467
Mentioned: 24 Post(s)
Quoted: 89 Post(s)
Quote:
Originally Posted by watskooo View Post
Good stuff! Any ideas how much weight some of those items saved?

Are you running the Thorsten/TurnOne airbox? If so which carbon/kevlar fuel tank did you find to work with it? I've looked a couple places, but haven't really ever found too many Ti fasteners left over for the RC.
I have an ETI fuel cell I'm fitting to the bike.
It only weights 5 lbs by my scale (and I had a hard time believing it was that heavy).
And no, it does not fit the T-O airbox I have.

Rather than risk damaging the T-O airbox (since they're out of business), I'm instead fitting a copy of the Moriwaki airbox.

On a related note, anybody running a T-O snorkel on the street?
If so, did you have problems with headlight clearance?
Mine doesn't clear the headlight shells, so I'm reinstalling the OEM snorkel minus the internal flapper divider I removed.

As for Ti fasteners, Pro-Bolt has a reasonable selection.
Axle nut and bolt, caliper pad pins and bolts, linkage bolts, and the usual socket and flanged head bolts.
Mettec has some specialized bolts, such as cam cover bolts, linkage bolts, and such.

Last edited by SubSailor; 05-14-2010 at 07:14 PM.
SubSailor is offline  
post #7 of 17 (permalink) Old 05-16-2010, 06:05 PM
Member
 
Iceman_JD's Avatar
 
Join Date: Nov 2009
Location: Glendale Az
Posts: 85
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by SubSailor View Post
On a related note, anybody running a T-O snorkel on the street?
If so, did you have problems with headlight clearance?
Mine doesn't clear the headlight shells, so I'm reinstalling the OEM snorkel minus the internal flapper divider I removed.
First gen snorkel was to wide for the headlights as you found out, second gen fit much better.

Also steering lock issues with the forks hitting the snorkel. Someone forced fit it but had problems with headlights starting to rub a hole in the snorkel.

I didn't like the fact you lost the upper fairing mounts either.

Check out the pics of a used first gen snorkel from a member at our friends at Speedzilla. You can see the future had you install the gen 1 snorkel.

http://www.speedzilla.com/forums/hon...l-gen-1-a.html

Someone fabbed one out of aluminum that was petty cool but I'll be damned if I can remember where I saw it.

John
Iceman_JD is offline  
post #8 of 17 (permalink) Old 05-16-2010, 08:41 PM
Moderator
 
SubSailor's Avatar
 
Join Date: Oct 2008
Location: Sarasota, FL
Posts: 6,467
Mentioned: 24 Post(s)
Quoted: 89 Post(s)
Unfortunately, mine is gen 2 snorkel.
The lack upper cowl mounts would be no problem.
They can be fabricated with aluminum or carbon-fiber pieces and rivets.
Too bad someone can't injection mold a replacement performance snorkle.
While not as sexy as carbon-fiber, at least the dimensions would be consistent.

Last edited by SubSailor; 05-16-2010 at 08:43 PM.
SubSailor is offline  
post #9 of 17 (permalink) Old 06-07-2010, 06:57 AM
Lifetime Premium
 
Waldo's Avatar
 
Join Date: Aug 2009
Location: Boise Idaho
Posts: 861
Mentioned: 3 Post(s)
Quoted: 40 Post(s)
Quote:
Originally Posted by SubSailor View Post
I have an ETI fuel cell I'm fitting to the bike.
It only weights 5 lbs by my scale (and I had a hard time believing it was that heavy).
And no, it does not fit the T-O airbox I have.

Rather than risk damaging the T-O airbox (since they're out of business), I'm instead fitting a copy of the Moriwaki airbox.

On a related note, anybody running a T-O snorkel on the street?
If so, did you have problems with headlight clearance?
Mine doesn't clear the headlight shells, so I'm reinstalling the OEM snorkel minus the internal flapper divider I removed.

As for Ti fasteners, Pro-Bolt has a reasonable selection.
Axle nut and bolt, caliper pad pins and bolts, linkage bolts, and the usual socket and flanged head bolts.
Mettec has some specialized bolts, such as cam cover bolts, linkage bolts, and such.
I called ETI about getting a tank and they are telling me I need to cut about a 1/4 of inch off my Thorsten box. This means I will be cutting off the seal lip. What did you ever do with the sealing surface of your airbox to tank?
Waldo is offline  
post #10 of 17 (permalink) Old 06-07-2010, 11:34 AM
Member
 
Iceman_JD's Avatar
 
Join Date: Nov 2009
Location: Glendale Az
Posts: 85
Mentioned: 0 Post(s)
Quoted: 0 Post(s)
Nice tank...
http://www.eti-fuelcel.com/RC51.HTML
Better fuel range than the new 2010 VFR?

John
Iceman_JD is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Honda RC51 Forum : RC51 Motorcycle Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome