Well that would depend on what type of use. YSS 362TRWL Twin at 330mm length for all out performance (list $1,069.00 pair) with adjustable rebound, compression, length and preload.
YSS Z362 TRL Twin at 330mm (list $499.00 pair) for good handling and comfort and with adjustable rebound.
Race Tech also makes excellent quality components but these are aimed at very high performance or racing. Thus they are very firm and highly adjustable.

Tech guys will generally steer you towards springs that are stiffer than needed. Softer is easier on the back and easier to setup than the really stiff stuff.
2.7 KG/mm = 150 LBS/in. is what I use when riding solo and 4.0 = 225 LBS/in when two up. Also with good rebound control you can setup with more set-in so the 330 or 13.0" long shocks can be set to ride at the same height as 12.5 long stock shocks. Reduce set-in and you get more aggressive turn in.
As im fixing to call racetech for rear shocks right now thank you for the reply
 
Well that would depend on what type of use. YSS 362TRWL Twin at 330mm length for all out performance (list $1,069.00 pair) with adjustable rebound, compression, length and preload.
YSS Z362 TRL Twin at 330mm (list $499.00 pair) for good handling and comfort and with adjustable rebound.
Race Tech also makes excellent quality components but these are aimed at very high performance or racing. Thus they are very firm and highly adjustable.

Tech guys will generally steer you towards springs that are stiffer than needed. Softer is easier on the back and easier to setup than the really stiff stuff.
2.7 KG/mm = 150 LBS/in. is what I use when riding solo and 4.0 = 225 LBS/in when two up. Also with good rebound control you can setup with more set-in so the 330 or 13.0" long shocks can be set to ride at the same height as 12.5 long stock shocks. Reduce set-in and you get more aggressive turn in.
Spot on about tech guys steering you towards too heavy a spring, race tech 1.1kg fork spring is too much in the touring even with the batwing 1.0kg would have suit me better
 
So, I think I'm going with the 444's. I found a good price and right now Progressive is running special, buy 444's get free fork springs. IRT to the YSS shocks, I looked at/got a quote for both:
RZ362-320TRL-50
RZ366-320TRL-50

Only difference I could see between the two is the 362's have a 12mm shaft and the 366's have a 16mm shaft. I'm sure someone more knowledgable will correct me if that's not the case. The best price I could find was wrs (link that has been quoted before). I contacted a US based supplier that was mentioned on this website and although his initial numbers were quite a bit higher, after emailing him he reduced the price greatly (I'm waiting on him to authorize me to share it on the site).
 
Info for anyone looking for YSS shocks in the US.
Klaus at EPM Performance Imports emailed me the following regarding the YSS shocks:


Scott,
I am servicing the North American market and supply service to my customers. I will not supply parts etc to people who buy the shocks overseas cheap and then when they have problems coming to us to have them fixed.
The prices you can offer at the list are:
RZ 366 model at $ 589.00 shipped in the US 48 lower states
RZ 362 model at $ 445.00 shipped in the US 48 lower states

Regards,
Klaus

P.S. He also mentioned that he does not like the Progressives, but I won't get into that.
 
As I mentioned earlier,
This is the guy I bought mine from many years ago.
I live only an hour away and I had him install my fork springs when I got the shocks (forget which make of fork springs).
And years later, he shortened the same set of YSS shocks for me. He's a reputable guy.
 
Info for anyone looking for YSS shocks in the US.
Klaus at EPM Performance Imports emailed me the following regarding the YSS shocks:


Scott,
I am servicing the North American market and supply service to my customers. I will not supply parts etc to people who buy the shocks overseas cheap and then when they have problems coming to us to have them fixed.
The prices you can offer at the list are:
RZ 366 model at $ 589.00 shipped in the US 48 lower states
RZ 362 model at $ 445.00 shipped in the US 48 lower states

Regards,
Klaus

P.S. He also mentioned that he does not like the Progressives, but I won't get into that.
The site doesn't mention 366... the list specifies 362 for Rockets. I ordered the 362s.
What's the difference?
 
It's been awhile since I was looking at the specs, but I think the 366 has a bigger/heavier duty shaft. That's just off the top of my head. I'll look for the link to the specs when I get back to my computer tomorrow.
 
The site doesn't mention 366... the list specifies 362 for Rockets. I ordered the 362s.
What's the difference?
Four options available for Rocket IIIs here. Black and Silver standard or lowered.

The front fork valves may be just for R3Ts. Need to read up.
The RZ 366 here with Aussie $ prices (US$0..77).

RZ366-TRL
Black or Classic 88 Series (Silver).

1611632844802.png

1611632862324.png



1611633304787.png
1611633336144.png




1611633745801.png
 
Four options available for Rocket IIIs here. Black and Silver standard or lowered.

The front fork valves may be just for R3Ts. Need to read up.
The RZ 366 here with Aussie $ prices (US$0..77).

RZ366-TRL
Black or Classic 88 Series (Silver).

1611632844802.png

1611632862324.png



1611633304787.png
1611633336144.png




1611633745801.png
Ooooh look at them knock off copied race rech emulators just playin whatever they work and change the forks 10 fold over new springs alone
 
Tighten up on your links will ya how we suppose to buy good stuff
 

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