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

Top End Rebuild ?


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





Lonestar-nsr

 
Posts: 47
Joined: 20 Sep 2005

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

Top End Rebuild ?

Fri Dec 02, 2005 3:07 pm » Post: #1 » Download Post

My compression is low about 100 psi when warm. Can I just put new rings in it?or do I need to have the cyclinders reworked?I'm not to familar with the nikosil or plating with these new style 2stroke cylinders thanks for any input Rob.
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 Dec 02, 2005 3:52 pm » Post: #2 » Download Post

Depends. You need to measure the rings, pistons and barrels to see whats worn. Just replacing the rings will help, but only by so much if the piston and barrel are out of limits too...
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

Back to top


Andy
Site Admin
 
Posts: 11950
Joined: 19 Jan 2004

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

Fri Dec 02, 2005 5:56 pm » Post: #3 » Download Post

If the barrel is unmarked, then you will most likely just need new rings. The plating on the cylinder is rock-hard, and highly unlikely to be worn.

Although not a definitive way to tell, as every rider/condtion is different, what mileage has the motor covered (a) in total, and (b) since you've owned it? This will give a loose indication as to whether just rings, or pistons and rings will be needed.

At the end of the day though, you won't really know until you pull the barrels off and have a measure up.
_________________
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


Lonestar-nsr

 
Posts: 47
Joined: 20 Sep 2005

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

Fri Dec 02, 2005 8:58 pm » Post: #4 » Download Post

Thanks again Dave and Andy for your help as always
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