SE valve springs

[hrdtail78]

I was looking at bolting in the Red Shift 552 cam into an already existing 124.  Build is a S&S 124 drop on cylinder and piston kit, and SE cnc heads.  Zippers state that the SE springs are not good enough for their 550 lift cam and I need the springs they offer.

I run their EV715 cam in an engine that redlines at 8000, and I have a special spring package to deal with it.  Is this really a concern for a street bike that is going to 6200?  What are peoples opinions on the SE spring packs they offer?


https://www.zippersperformance.com/red-shift-552-m8-cams/

[Don D]

By the specs they are fine but they break! I recommend using Kibblewhite 20-21800 available from Goodson

[JSD]

Moonshine Harley Use fueling as they have had Se breaking