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 here and have a question or two


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





machinerage

 
Posts: 46
Joined: 25 Nov 2007

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

new here and have a question or two

Mon Nov 26, 2007 5:51 pm » Post: #1 » Download Post

after having a look round this site, i discovered that the mc28 can be deresricted by the wire splicing method and the use of a "certain" hrc card. will full power be attainable this way? and, how does the unrestricted mc28 output compare to the unrestricted mc21's? this "certain" hrc card... a difficult find, or not?
Back to top


fontyyy

 
Posts: 3509
Joined: 10 Apr 2004

Location: Derbyshire, England
1991 Honda NSR250 MC21
    Send private message View user's profile Visit poster's website MSN Messenger
    Reply with quote  

Mon Nov 26, 2007 7:17 pm » Post: #2 » Download Post

And one more time Wink

The HRC 030 card is the only one still available, Tyga can help you get one, talk to them.

To properly de-restrict a '28 you'll need;

a; an HRC card.
b; to wiresplice the loom.
c; to either grind the washers from the exhaust pipe headers (if they're there, some aren't) or fit some race pipes.
d; to cut a couple of 1.5" holes in the airbox lid.
e; to get this lot set up, so ideally you also want the HRC jet kit.

Then you'll have something that is about the same as a de-restricted and setup but otherwise stock mc21, or an mc18 with the orange wire pulled apart, i.e. in the region of 60-62bhp.

You should be aware that the speedo, low oil warning and odometer will all vanish with an HRC card in the card slot and in it's place the speed read out will be engine temperature instead. Also the side stand in gear cutout stops working.
If you put the o.e. Honda card in (despite rumours to the contary it will work and run, all be it very badly) the speedo and odometer work but the low oil warning is gone, as is the "off" warning you'd get if the on/off switch was "off".

You can also do half a job by fitting the mc21 flywheel and sorting the exhaust and airbox out same as above. The result is a little bit flat at the very top compared to a full fat mc21 but it does retain all the road kit and is quick enough to keep a sorted RVF400 ridden fairly sanely in sight on the road up to 100mph or so which is all I want. Once again some level of set up will be in order.

I've got both, an 030 carded one and one with a '21 flywheel (well, whole engine actually).
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread
Back to top


machinerage

 
Posts: 46
Joined: 25 Nov 2007

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

Tue Nov 27, 2007 12:46 pm » Post: #3 » Download Post

thanks. well done. i suppose the mc21 is the nsr to have(?).
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  

Tue Nov 27, 2007 2:24 pm » Post: #4 » Download Post

Here we go again...

YES! Wink
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Back to top


machinerage

 
Posts: 46
Joined: 25 Nov 2007

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

Tue Nov 27, 2007 7:25 pm » Post: #5 » Download Post

okay, okay... sorry i asked... not really Smile in any event, i'll take your advice and go for the mc21. thanks for the input fontyyy and ett.
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  

Tue Nov 27, 2007 8:07 pm » Post: #6 » Download Post

In the USA, the best NSR is the one you can get hold of with a title! Anything after that is less important.

The MC21 is the best mix of parts availability, ease of de-restricting and ownership. The MC18 is often quoted as faster, though is the oldest of the sensible options. The MC28 is the newest, but has complicated ways to access any decent power.

Most bits will interchange with the 21 though, so just about any kind of hybrid is possible.

Buy whatever you can afford, and worry about the power later.
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

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