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Old 10-17-2019, 07:48 PM   #1
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Upgraded Spartan K-3 front shocks and motion control valves

At Minot FMCA rally purchased a set of 60 mm Bilstein front shocks used on King Aires and now in 2020 MA on up K-3 chassis. Also added motion control valves for front air bags that limits or slow down movement air in and out of air bags. The reason for the change was a soft suspension on front end that would bottom out on some dips. With these two additions and our first time out can, report that this firms up the front end and makes our 18 London Aire tighter in driving and a noticeable improvement.
Paid almost a thousand dollars from Spartan for the 60 mm front shocks but have heard that Koni also makes a 60 mm front shock for the K-3 that are around 200 dollars and might be just as good and a lot less. Went to Koni web site and there was no listing for these shocks. The motion control valves go in air line just before the air bag and limit the air movement in and out of air bag and around 125 dollars a piece.
If you are sometimes bottoming out on dips and/or wanting to firm up the front suspension on your K-3 chassis with the 20K rating would recommend this upgrade.
Newmar Man
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Old 10-18-2019, 09:04 AM   #2
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I had Konis added at Spartan and the cost was about $500 installed.
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Old 10-18-2019, 10:28 AM   #3
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Did you think the Koni were overall better then Spartan front shocks? What problems lead to replacing front shocks? The price is much better. Changed front shocks myself, not real easy because of high torque on bottom and top shocks.
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Old 10-18-2019, 11:39 AM   #4
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There was a lot of harshness originally, like when crossing a bridge on the interstate. Much better with Konis.
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Old 10-18-2019, 08:17 PM   #5
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Quote:
Originally Posted by Ken Gluckman View Post
There was a lot of harshness originally, like when crossing a bridge on the interstate. Much better with Konis.


I also replaced my Sach shocks with Koni Evos. Very good improvement. Smoothed out harshness on bumps and bridge strips. Only negative is where I purchased them. Shock warehouse. Horrible customer service.
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Old 10-18-2019, 09:05 PM   #6
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Day two with up graded front suspension on and like the shocks and motion control valves. Hit some big dips on 99 and no bottoming out and felt better with steering after big dips. One could cut the cost by going with Koni 60 mm front shocks by 400$ and would have been the way we would have gone today.
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