NSR250.net Forums Logo: Honda NSR 250 Forums, Classifieds and Service Manual in English. Covering All Honda NSR 250 MC16, MC18, MC21 and MC28 models
NSR250.net Forums

#
 
#
 
Performance Engineering

  • NSR250 Forums Index ‹ NSR250R Discussion
  • Members Content
  • Members Garage
  • Subscription
  • Transactions
  • FAQ
  • Search
  • Register
  • Log in

new racer


Reply to topic   printer-friendly view
Page 1 of 1   Download Topic





duallie1983

 
Posts: 15
Joined: 07 Jul 2007

Location: Saskatchewan Canada
    Send private message View user's profile
    Reply with quote  

new racer

Fri Feb 08, 2008 6:48 am » Post: #1 » Download Post

Hey, I'm wondering if anyone can answer some questions for me. First off I'm taking some racing classes this spring and need some advice. What suspension and brake upgrades (budget minded) should I perform on my mc18 r5k? SP rear shock? Are the front forks good enough if I have someone revalve and set them up for my weight? issthere a fairly easy front end swap that will be cost effective and give results? If so what year/model and what is involved? Decent tires, I am noticing the selection around here is limited. Any other suggestions would be appreciated as well.
And on an unrelated matter, what is the biggest difficulty in mounting mc21 fairings to mc18's. I know some people on here have done so and I would like to put a tyga mc21/28 kit on my mc18.
_________________
2stroke or squeezed
Back to top


Dave Ett
Site Moderator
Site Moderator
 
Posts: 3648
Joined: 20 Feb 2004

Location: Gloucestershire, England
    Send private message View user's profile
    Reply with quote  

Fri Feb 08, 2008 8:22 am » Post: #2 » Download Post

Best budget minded suspension improvement is simply to have the standard gear fully serviced and built to your own particular needs (weight etc). Transformed my MC21 when I was racing it.

Then have the suspension set up at the track by someone who knows what they're doing working with you - set up the sag for your weight, setup the fork height so the bike drops into corners how you like it etc.

Fully service the brakes and fit fresh pads.

GPR70 tyres are good enough to scrape the fairings on a sunny day, but a bit scary in the wet. Not sure what you have available to you out there...

No idea on the fairings! Rolling Eyes
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Back to top


Andy
Site Admin
 
Posts: 11948
Joined: 19 Jan 2004

Location: Devon, UK
1991 Honda NSR250 MC21
    Send private message View user's profile
    Reply with quote  

Fri Feb 08, 2008 2:44 pm » Post: #3 » Download Post

A massive improvement to the R5K can be had by fitting the F3 spec rear shock link plates.

Technical Resources

The not only raises the rate of the rear spring, but raises the rear ride height, and consequently steepens the steering angle too. Pulling the forks 10mm or so through the yokes (triples) also makes a big difference.

As Dave says, a quality suspension rebuild is the most cost effective upgrade. I believe (but can't remember for sure) that an early CBR600 rear shock will fit with very little modification, so you may be able to find an old Ohlins/Maxton etc. and have that rebuilt to the correct weight. RS250 RWU front forks will fit straight in to the NSR clamps. If you use 1991 you get compression, preload, and rebound adjustment that actually works! You also get caliper mounts spaced for 296mm discs.
_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.


Check us out on Facebook! Please "like" our page!
Back to top


duallie1983

 
Posts: 15
Joined: 07 Jul 2007

Location: Saskatchewan Canada
    Send private message View user's profile
    Reply with quote  

Tue Feb 12, 2008 3:34 am » Post: #4 » Download Post

So i have heard that vfr400 forks and brakes are a good upgrade, is this so? It would probably be easier for me to find a set of vfr forks thans rs250 ones. And since I was planning on having the forks rebuilt I could change the spring rate to suit the lighter bike then. Does the nsr wheel fit fine with vfr forks?
Also where is a good online place to buy some gpr70's. It seems there is almost nothing for tires for my bike here so I might order from over seas.
Thanks for all the info so far guys.
_________________
2stroke or squeezed
Back to top


Andy
Site Admin
 
Posts: 11948
Joined: 19 Jan 2004

Location: Devon, UK
1991 Honda NSR250 MC21
    Send private message View user's profile
    Reply with quote  

Tue Feb 12, 2008 4:21 am » Post: #5 » Download Post

The forks themselves aren't necessarily an upgrade but they will allow you to use 296mm discs.

NSR wheel will fit no problem, and VFR400/RVF400/VTR1000F etc. discs all fit the NSR wheel.
_________________
Andy.
NSR-WORLD.COM

Please keep all responses to Forum posts on the Forum so that others may benefit.

Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.


Check us out on Facebook! Please "like" our page!
Back to top


Reply to topic   printer-friendly view
Page 1 of 1   Download Topic

NSR250R Discussion

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You cannot download files in this forum

  • NSR250 Forums Index
  • All times are GMT
Powered by phpBB © 2001, 2005 phpBB Group


Hosted by NSR250dotNET © 2008 NSR250dotNET