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

MC21 Oil/Water pump drive gear


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





mellorp
Banned
 
Posts: 218
Joined: 26 Jul 2012

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

MC21 Oil/Water pump drive gear

Fri Aug 29, 2014 10:37 am » Post: #1 » Download Post

On taking this gear assembly off, one of the bolts has sheared off in the crank case. I think the previous rebuild must have emptied a tube of thread lock in there. Anyway when I put it all back together are the other 2 bolts sufficient to hold it all in place ?

Item 27 on this diagram http://workshop.nsr-world.com/11kv3lj7/2FK11KV3LJ7/Pic/E9.html

Cheers

Phil M
_________________
MC21R ; MC21SP , plus some other none Honda 2t's
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 Aug 29, 2014 12:18 pm » Post: #2 » Download Post

That's the transmission oil pump, and I think you already know the answer to this!

Anyone who tells you that two bolts will be sufficient, shouldn't be allowed near tools, let alone a motor!
_________________
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


mellorp
Banned
 
Posts: 218
Joined: 26 Jul 2012

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

Fri Aug 29, 2014 1:46 pm » Post: #3 » Download Post

Wasn't sure what it actually was as it's called the oil/water pump drive gear in the rebuild instructions
http://www.nsr-world.com/workshop/rebuild/rebuild-2.php
and the pump missions oil in the parts workshop/parts manual, so thanx for clearing that up Smile

My next question is can you (Andy) or anyone drill the bolt out without ruining the cases ?
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 Aug 29, 2014 2:31 pm » Post: #4 » Download Post

Highly likely we can get the remains of the bolt out, but it will of course entail at the very least, a transmission strip. You don't want to run the risk of any debris getting lost internally.

It's most likely that you can't just simply drill it out. It's too small, and if you slip, or even don't run down the centre of the bolt, you'll ruin the cases. The cases will probably need to be mounted in the mill, to hold them securely.
_________________
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