Clutch Spring Differences CA77

brewsky · Post by **brewsky** » Mon Mar 01, 2010 9:21 pm

I now have two different size clutch springs to choose from, which is for what? (With metal core fiber plates)

davomoto · Post by **davomoto** » Tue Mar 02, 2010 7:16 am

The shorter, thicker ones are probably 810 racing springs, very hard clutch pull. I've had good results with the 425 center code springs, nice light clutch pull, and no clutch slipping.

davomoto

brewsky · Post by **brewsky** » Tue Mar 02, 2010 8:00 am

I got the shorter ones from Loud Mouse with the metal core friction plates/steel plates as a set, and he recommended them over the longer ones I removed with my old all fiber frictions, so I will use them.
Silvers book specifies spring tension of 30-40 lbs but gives no units.......lbs per what?.....inch,... cenitmeter??
Silver also mentions using CB 750 K springs, and I have a bunch of them but they are SOHC and are much longer.

davomoto · Post by **davomoto** » Tue Mar 02, 2010 8:34 am

If you got them from Ed, they are surely what you want to use!

davomoto

LOUD MOUSE · Post by **LOUD MOUSE** » Tue Mar 02, 2010 10:32 am

They are a bit longer and thinner diameter than the 810 springs and I'd sure like to know what issue they are.
I do find them (painted white end) in all the original Cush Drive clutches and the pull in my opinion is perfect.
I have a gauge which reads pounds pressure as I compress the spring.
Well I measured the total distance the spring is collapsed when correctly installed.
I then measured 3 different styles of the springs HONDA used over the years at that length.
At the exact length of each spring the pressures were the same. ??????????????????
Bill Silver was here when I did this.
Pull pressure may be caused by Coil Bind!!!!!!!!!!!??????????????
I do know that the White End Springs are the best I've ever used and that's why I recommend them. ..........lm

davomoto wrote:The shorter, thicker ones are probably 810 racing springs, very hard clutch pull. I've had good results with the 425 center code springs, nice light clutch pull, and no clutch slipping.

davomoto

teazer · Post by **teazer** » Tue Mar 02, 2010 11:23 am

Apropos of nothing, we used to use CB750 race springs which were the same spring rate but longer. The extra length gave us more pressure installed, but the same force required to lift the clutch.

LOUD MOUSE · Post by **LOUD MOUSE** » Tue Mar 02, 2010 11:34 am

Give me a hint on the (Apropos of nothing) teazer.
How much longer than the originals?. ........lm

teazer wrote:Apropos of nothing, we used to use CB750 race springs which were the same spring rate but longer. The extra length gave us more pressure installed, but the same force required to lift the clutch.