Beehive valve springs

[BR46]

Now that RD springs is gone who's selling beehive valve springs for the XS650?

 

[JAX71224]

Now that RD springs is gone who's selling beehive valve springs for the XS650?

Not beehive, but I used Kibblewhite

 

[zrx1100]

this is the one I have: https://shop.kpmi.us/products/racing-spring-kit-h-t-steel-0-515-lift-yamaha-xs-650-1970-1983

 

[BR46]

this is the one I have: https://shop.kpmi.us/products/racing-spring-kit-h-t-steel-0-515-lift-yamaha-xs-650-1970-1983

I wonder how high you can rev them before valve float

 

[zrx1100]

these are heavy duty and have been used in racing by Gary Hoos and Roger from R&D motorcycles. I have taken them out to 8-8.5K on many dyno runs with Shell #1 cam.

 

[BR46]

I will look into them.
I shift between 8-8,500 now with the beehive springs that I'm running in my sidecar now.

 

[Signal]

Kibblewhite springs are up to the job. Also Smed speed sell beehive springs.
https://www.smedspeed.co.uk/valve.html

 

[BR46]

Kibblewhite springs are up to the job. Also Smed speed sell beehive springs.
https://www.smedspeed.co.uk/valve.html

Thanks
I actually just found that website last night.