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Trike Master
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Don't know how many miles are on the current fork springs??? If you rebuild the forks, use stock springs. Also, tire pressure can cause a harsh ride. Suggest no more than 36psi in front tire and 22psi in rear tires.
 

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Premium Member
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3,722 Posts
Are you talking about front forks or rear axle?

If you mean front forks, does it have a "rake kit" installed to reduce trail & steering effort? If this is the case, it's not uncommon for people to have early on installed Progressive Suspension front fork springs when it was a bike, then later install a "rake hit" that doesn't really change rake, doesn't change steering stem at all … it just lays the fork tubes down a few more degrees to kick the front tire out to reduce trail. When this is done, the "rake kit" with the Progressive Suspension springs in front, the ride is very harsh.

My trike fit this group. The original owner had installed the PSD #11-1152 springs, then I installed a 6 degree kit, it was like an empty truck.

People soon discovered that the softer springs intended for the GL1200 from PS worked better with a 3/4" spacer as they have a softer rate change. I intended to order those same #11-1122 springs to use in my GL1500. I ordered some, they arrived, I went to install, could not do so with spacers … then I noticed box said 11-1112 and in checking specs, I found out why I couldn't get them in with spacers. They were the correct rate I desired, but too long. I installed with no spacers, they were 100 times better than the 11-1152 were IMHO. I later got a set of 11-1122 and tried them with spacers, but went back to the 11-1112 springs & no spacers.

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Progressive # 11-1112 is for Kawasaki KZ1200/1300 (and what I use in my 1500 trike with Champion 6 degree EZ-Steer) ....
20.75 " L <>1.19" OD <> 45/70 Lbs/In. rate
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Progressive # 11-1122 is for GL-1200 Gold Wing motorcycles (use of a 1/2" or 3/4" spacer is suggested when used in GL1500 based trikes with "rake kits") ....
20.00 " L <>1.34" OD <> 45/70 Lbs/In. rate
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Progressive # 11-1152 is for GL-1500 Gold Wing motorcycles ....
20.50 " L <>1.35" OD <> 35/80 Lbs/In. rate
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For spacers, I used PCVC for the short time I had the 11-1122 springs in place.
The 11-1112 are exactly 3/4" longer.

I also use a 50/50 mix Belray 5wgt & 10wgt fork oil.

If you are talking about rears, I forget what is on a CSC?
 
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