hairpin valve springs wear

Ducati single cylinder motorcycle questions and discussions, all models. Ducati single cylinder motorcycle-related content only! Email subscription available.
Moderator: Morpheus

Moderator: ajleone

Scottish888
Posts: 266
Joined: Wed Feb 07, 2018 1:47 am
Location: Edinburgh, Scotland UK

hairpin valve springs wear

Postby Scottish888 » Mon Jun 17, 2019 11:00 am

Do you folks think these hairspring valve springs may be ok or should be replaced?
I would like to re use but not sure if the wear is acceptable or not.

Regards
Valve springs_edited.jpg
You do not have the required permissions to view the files attached to this post.

Jordan
Posts: 1380
Joined: Fri Dec 24, 2010 11:29 am

Re: hairpin valve springs wear

Postby Jordan » Mon Jun 17, 2019 2:09 pm

I think they are OK for normal use, as long as any sharp changes of section caused by the wear are smoothed by filing etc.
I've seen hairpin springs that were worn to half original diameter, still working well enough.
Where the wear occurs does not effect the spring action, although there is a small loss of installed height = pressure.

blethermaskite
Posts: 477
Joined: Thu Mar 01, 2018 1:06 am
Location: northern ireland

Re: hairpin valve springs wear

Postby blethermaskite » Mon Jun 17, 2019 7:20 pm

I would use them! seen and used a lot worse, as Jordan said....just make sure there are no sharp edges to the wear areas, and if so smooth down.
Cheers,
George

ranton_rambler
Posts: 439
Joined: Sun Jun 04, 2017 11:33 am
Location: Stafford UK

Re: hairpin valve springs wear

Postby ranton_rambler » Mon Jun 17, 2019 7:45 pm

That’s reassuring because that’s what mine looked like, and I refitted with the steps smoothed out a bit.
They’re not too expensive to buy, but easy for costs to get out of control with these little bikes.

Scottish888
Posts: 266
Joined: Wed Feb 07, 2018 1:47 am
Location: Edinburgh, Scotland UK

Re: hairpin valve springs wear

Postby Scottish888 » Tue Jun 18, 2019 11:08 am

Thanks to all,

Glad I can re use them, this bike is only for road use.
This is the most interesting engine I have worked on and looking forward to getting it running soon.
Regards


Return to “Ducati Singles Main Discussions (& How to Join)”

Who is online

Users browsing this forum: Boxprod and 52 guests