×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Contact US

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Multiple Valve Application, Honda

Multiple Valve Application, Honda

Multiple Valve Application, Honda

(OP)
Greetings,

My questions/comments apply to the Honda CX-500 series of motorcycle engines, specif the 1980 CX-500.  (Restoration Project)

Other info:  Transverse "V" twin, liquid cooling.  Four valves per cylinder.

It seems logical that engine designer(s) would not necessarily "reinvent the wheel" if valves for other applications are available/suitable. It may be possible that the valves used in said CX engine have other applications (most likely Honda autos of the era or "small engines" ie; home generators etc).  A "keep it in the family" thing.  

It would be great to discover that reasonably priced auto valves of stainless steel (they are available) are suitable as replacement for the late 1970's motorcycle OEM steel units.  More appropriate for year 2007 fuels...corrosion/errosion less of a problem.  Esp when the engine not run, (winter storage etc).

The CX valves in question measure as follows:  (These are used valves, wear/corrosion/errosion, 26000 miles of use...the dimensions reflect such)

Intake:  OAL 4.050", Shank OD .2585", Head OD 1.222"       
Exhaust: OAL 4.085", Shank OD .2580", Head OD 1.066"

Would there be a lubrication issue with valve guide composition if stainless valves are substituted?

Your thoughts/comments most appreciated.

Hotfoot3946

RE: Multiple Valve Application, Honda

Hi Mr Hotfoot,
       Yes a tricky question indeed.A guy I work with was telling me yesterday that he's running a Datsun 180b piston in his IT490 dirt bike minus the oil rings!So it's all possible.No doubt there will be valves of the exact size you need somewhere in the automative archives,it'll just test your dilligence in finding them.Another point is that generally motorcycles,for good reason,are regarded as much higher performance vehicles and the substrate material will be more exotic and harder wearing.Point being even though your bike isn't a fire breathing monster I would be dubious about running passenger car valves in a nicely restored machine for fear of mechanical failure.Just my opinion.The IT 490 guy obviously isn't too worried about this.   Good luck with it Richard

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members! Already a Member? Login


Resources

Low-Volume Rapid Injection Molding With 3D Printed Molds
Learn methods and guidelines for using stereolithography (SLA) 3D printed molds in the injection molding process to lower costs and lead time. Discover how this hybrid manufacturing process enables on-demand mold fabrication to quickly produce small batches of thermoplastic parts. Download Now
Design for Additive Manufacturing (DfAM)
Examine how the principles of DfAM upend many of the long-standing rules around manufacturability - allowing engineers and designers to place a part’s function at the center of their design considerations. Download Now
Taking Control of Engineering Documents
This ebook covers tips for creating and managing workflows, security best practices and protection of intellectual property, Cloud vs. on-premise software solutions, CAD file management, compliance, and more. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close