1979 Suzuki GS 750 - Valve Springs ID

[odl777]

Hello, are Exaust and Intake valve springs different? My machine shop said one was longer?
I told them to use the longer one for the exaust.

Thank you,

Mark

[BassCliff]

Hi,

The valve spring sets are the same for intake and exhaust. Part# 12920-45011, supersedes: 12900-45810 and 12920-45010.

#10 in the picture. 2 different springs per valve. 8 sets required, 1 set for each valve.




Mr. Steve makes it look easy to replace valves, valve seats, and valve springs.

Valve Replacement
(by Mr. Steve)

Thank you for your indulgence,

BassCliff

[odl777]

Thank you! I have seen the same thing....it boggles my mind to think as to why the machine shop is stating one is taller then the other??? ANy Idea?

Thanks

[BassCliff]

Hi,

There is a valve spring length spec in the manual. Once the spring is permanently compressed to less than this length it should be replaced.



Thank you for your indulgence,

BassCliff

[odl777]

I think I figured out the issue. I am almost willing to bet my left nut that the machine shop saw that I gave them an extra set of valves and probly thought the wide springs and skinny springs which happen to be differnet lengths where two different sets! I need to call them ASAP! I gave them the manual? Maybe I should not of taken head there. ) :

[Ranger]

Hi,

The valve spring sets are the same for intake and exhaust. Part# 12920-45011, supersedes: 12900-45810 and 12920-45010.

#10 in the picture. 2 different springs per valve. 8 sets required, 1 set for each valve.




Mr. Steve makes it look easy to replace valves, valve seats, and valve springs.

Valve Replacement
(by Mr. Steve)

Thank you for your indulgence,

BassCliff

Check the link, his video is no longer available both on photobucket and the other website.

[Big Jay]

I think I figured out the issue. I am almost willing to bet my left nut that the machine shop saw that I gave them an extra set of valves and probly thought the wide springs and skinny springs which happen to be differnet lengths where two different sets! I need to call them ASAP! I gave them the manual? Maybe I should not of taken head there. ) :

That's what I was going to answer