Technical Discussion Topics related to Technical Issues

rc51 top triple

Old 07-04-2012, 06:29 PM
  #1  
erno
Back Marker
Thread Starter
 
erno's Avatar
 
Join Date: Apr 2009
Location: Australia
Posts: 226
erno is on a distinguished road
rc51 top triple

Hi guys
Was wondering what height for the rc51 top triple
On the rc51 f/end conversion
Some say 17mm/20mm from top of tube?
Or is it a personnel preference

cheers

Last edited by erno; 07-05-2012 at 01:51 AM.
erno is offline  
Old 07-05-2012, 02:35 AM
  #2  
GTS
Seasoned tech
SuperSport
 
GTS's Avatar
 
Join Date: Apr 2012
Location: Issaquah, WA
Posts: 576
GTS is on a distinguished road
Measure your height before you do the swap and put it back to the same height. And by height I mean ride height, not mm from the top of the forks. Then ride it and adjust it from there.
GTS is offline  
Old 07-05-2012, 09:51 AM
  #3  
Banned
MotoGP
 
Join Date: Aug 2007
Location: Lake View Terrace, CA
Posts: 5,942
8541Hawk will become famous soon enough
Mine are set at the top line (of the three lines on the tubes) on the forks.
Which is real close to the stock geometry on the front.
8541Hawk is offline  
Old 07-05-2012, 05:23 PM
  #4  
erno
Back Marker
Thread Starter
 
erno's Avatar
 
Join Date: Apr 2009
Location: Australia
Posts: 226
erno is on a distinguished road
Thanks again guys appreciate it
I know Im a pain in the **** asking about the front end setup
But no one over has done the rc51 con, besides 1 guy who got the shop to do it for him.
So its baby steps at the moment



cheers
erno is offline  
Old 07-05-2012, 06:20 PM
  #5  
Senior Member
SuperSport
 
Join Date: Mar 2010
Location: Asheville, North Carolina
Posts: 886
1971allchaos is on a distinguished road
Mike- Please elaborate..
If the triple claps are set lower on the forks tubes- Then this lowers the geometry of the front- and cause the turning quicker?
AND
Has you instructed bringing the forks to the top rings, as factory setting will cause turns-back to normal?
Are the RC-51 forks longer, or shorter than OEM S-hawk forks?
1971allchaos is offline  
Old 07-06-2012, 10:46 AM
  #6  
Banned
MotoGP
 
Join Date: Aug 2007
Location: Lake View Terrace, CA
Posts: 5,942
8541Hawk will become famous soon enough
Originally Posted by 1971allchaos View Post
Mike- Please elaborate..
If the triple claps are set lower on the forks tubes- Then this lowers the geometry of the front- and cause the turning quicker?
AND
Has you instructed bringing the forks to the top rings, as factory setting will cause turns-back to normal?
Are the RC-51 forks longer, or shorter than OEM S-hawk forks?
I'll try...

For your first question, yes pulling the fork tubes up will cause quicker turning. The down sides are you lower the CG, which slows the side to side transitions and you also lose ground clearance. The ground clearance issue is important on a SH as the first hard part to touch down is the header in right hand turns.

For your second part, yes if you set the forks at the stock location and made no other changes it would turn in like the stock set up.

And for the last part, I don't have my sheet with all the measurement but off the top of my head the RC forks are somewhere between 3-5mm shorter than stock.

So now to give the rest of the info and show what I'm talking about.

When I first installed the forks I used a 954 lower. The issue I had was that the forks had to be pulled up 10mm in order to get full engagement in the lower triple.

So it ended up looking like this:

rc51 top triple-001.jpg

In this pic you can see the RC forks have 3 sets of lines on them that are "stock", "up 5mm" and "up 10mm" Though one of the main issues I had with my stock suspension was dragging the header (I ran the forks up 10mm and had a 6.35mm or .25" ride height spacer). I hadn't worn a hole through mine yet as Tweety has done but there are definite "witness" marks on it.

So what I did was change to a RC51 SP1 lower clamp which allows the forks to be pulled down to the "stock" location:

rc51 top triple-042.jpg

Then to get the geometry that I wanted I raised the rear ride height to 10mm. With this set up I have the ground clearance I needed with the added benefit of keeping the CG higher for quicker side to side transitions and the rake and trail numbers very close (once again I don't have my work sheet handy so I can't give exact numbers) to the stock suspension with the forks pulled up 10mm and a 6mm ride height spacer.

This works very well for me, though might be a touch quick for some folks.... but everyone rides differently.

So IMHO you do get the best results when running a RC front end by keeping the forks pulled all the way down and then adjusting the rear ride height until it turns the way that fits your riding style.
8541Hawk is offline  
Old 07-06-2012, 03:57 PM
  #7  
Senior Member
SuperSport
 
Join Date: Mar 2010
Location: Asheville, North Carolina
Posts: 886
1971allchaos is on a distinguished road
OoRah.. I appreciate the editorial.. I asked as a benefit to all that reads these education threads .. I paid to have my bikes set-up/ and do little adjustments to my suspension - to fit my riding style..
1971allchaos is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
FL02SupaHawk996
Classifieds
0
03-28-2008 06:34 AM
Yardstick
Classifieds
1
11-20-2007 02:18 PM
Montana
Classifieds
1
10-02-2007 09:22 AM
skokievtr
General Discussion
1
05-14-2007 05:37 PM
inderocker
Technical Discussion
3
01-11-2006 05:54 PM


Thread Tools
Search this Thread
Quick Reply: rc51 top triple


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

© 2019 MH Sub I, LLC dba Internet Brands

We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.