175 CS, How to fix the Hair Pin Valve Spring - MVAgusta.net
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post #1 of 12 (permalink) Old 06-19-2018, 11:44 AM Thread Starter
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175 CS, How to fix the Hair Pin Valve Spring

I need some advice how to fix the hai pin valve spring. Who cann tell me or post some pictures?


Regards


Alexander
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post #2 of 12 (permalink) Old 07-14-2018, 02:35 PM
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Hi Alexander,
What do you mean by "fix the hair pin valve spring"? Please explain in more detail.
I'm running a CS57 with hair pin valve springs, so have plenty of pictures from when I rebuilt the engine. I may even have spare hair pin springs in my "spares package".
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post #3 of 12 (permalink) Old 07-14-2018, 03:13 PM
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Here's a photo of my hair pin valve springs. They worked perfect on 2018 Motogiro D'Italia!
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post #4 of 12 (permalink) Old 07-29-2018, 11:13 AM Thread Starter
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Thanks a lot for your answer and the picture! My question in detail would be how you could compress the springs for installing. Are special tools required for it or is it possible with common stuff? And at which stage have you installed them?
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post #5 of 12 (permalink) Old 07-29-2018, 04:04 PM
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Alexander,
I installed the springs after fitting the cam shaft and housing but before I fitted the rocker arms - see photo. You'll also see the valve stem seals I made to stop excess oil going down the valves.
And yes, you do need a special tool to compress the springs for fitting. It is quite simple, so I made my own tool - see photo showing it being used to remove the springs. The metal plates need to be quite strong. Be careful as the ends of the spring can come off the bottom plate, jump suddenly with force and cause injury. I added a strong cable tie around the clamp and through the spring coil and I suggest you wear eye protection.
Please ask if you need any more help or photos.
Ron
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post #6 of 12 (permalink) Old 08-01-2018, 05:19 AM Thread Starter
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Hi Ron,

thank you very much for your advice. I'll try to do it like you and build those little tools. Thanks for the pictures too!

Alexander
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post #7 of 12 (permalink) Old 12-18-2018, 12:47 AM
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Alexander,
Some more info might be found on 'MV Agusta 175 CS OHC motorcycles' (my group on Facebook). I posted a photo with some tools.

Ivan


1954 MV 175 CSS Super Sport
1957 MV 175 CS Modello Sport
1967 Motobi 125 Sport
1974 Ducati 750 GT
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post #8 of 12 (permalink) Old 12-18-2018, 05:32 AM
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@hulagun: For the non-FaceBook crowd (and there are many)...could you post the information here, please?


(Or are you trying to kill this forum?)

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post #9 of 12 (permalink) Old 12-18-2018, 05:15 PM Thread Starter
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Hi nIvan I have still some problems to fix this springs. I tried the way like Ron did but I didn't have success. So, it would be nice, if you would post a picture here. I'm not a facebook user.

Regards

Alexander
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post #10 of 12 (permalink) Old 12-19-2018, 12:03 AM
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Quote:
Originally Posted by silentservice703 View Post
@hulagun: For the non-FaceBook crowd (and there are many)...could you post the information here, please?

(Or are you trying to kill this forum?)
Yes, I put a hit out on this forum. You were joking when you made that wisecrack, right?

This is a good forum, but it's not that well populated with 175 MV riders either. Love it or hate it, FB is an easy additional resource to trade info, stories, and photos on. I don't like its politics much but you can't beat it for connecting with other like minded fans of obsolete junk.

I do post here when I can offer advice or help, but I can't "post the information" here, as I was referring to the collected knowledge of the membership over on the 'MV Agusta 175 CS OHC motorcycles' FB group. (Some of them don't do forums, they just do FB).

Cheers
Ivan


1954 MV 175 CSS Super Sport
1957 MV 175 CS Modello Sport
1967 Motobi 125 Sport
1974 Ducati 750 GT
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