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

Jetting help needed!!!!!!!!!!!!!!!


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





Harold

 
Posts: 81
Joined: 28 Jan 2010

Location: South Africa
    Send private message View user's profile Send e-mail
    Reply with quote  

Jetting help needed!!!!!!!!!!!!!!!

Sun Feb 14, 2010 12:31 pm » Post: #1 » Download Post

Can someone please help me out. Jets are hard to find in any sizes. If possible I can get a few MC28 jets from 170- 198 mains, but don't know whether it will work on my MC21.

The reason I'm asking is that I would like to fit my air box again as I am running open carbs at the moment. My jets are as follow:
Main jets: 185 ; 188
Slow jets: 40 ; 40
Air screws: 1.5 turns out
Power jets: blocked
Floats set at 12mm using Tyga's method.

The bike seems to over fuel a bit. I want to change my jetting for the air box fitment but would like to stay pre-mix. Anyone who can help please? And any suggestions on jetting?

Performance wise:
Bosson exhausts
HRC Reeds (not carbon flaps though)
Light weight flywheel (890g) Very Happy
PGM CDI (or PGM 1)
Engine 100% except the barrels. (Getting new ones)
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  

Sun Feb 14, 2010 7:20 pm » Post: #2 » Download Post

Discussion of specific settings is banned on the main forum, there's a section in the members area for it though.

mc21 and mc28 main jets are interchangable.
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread
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  

Sun Feb 14, 2010 7:25 pm » Post: #3 » Download Post

And if you do a search, there's a few threads detailing where you can get them mail order...
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Back to top


Harold

 
Posts: 81
Joined: 28 Jan 2010

Location: South Africa
    Send private message View user's profile Send e-mail
    Reply with quote  

thanx guys

Mon Feb 15, 2010 5:49 am » Post: #4 » Download Post

Thanx guys and sorry for the mistake. I am still very new to this site and don't know all the rules yet. But will sertainly remember this one.

Keep well.
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  

Mon Feb 15, 2010 8:22 am » Post: #5 » Download Post

No worries, if you do get stuck after a seach and read of the main site, please do ask. Wink
_________________
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