Hyperpro springs - Wrist Twisters
 
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post #1 of 6 Old 03-11-2009, 07:55 AM Thread Starter
DaveCB919F4
 
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Hyperpro springs

I am considering purchasing front and rear progressive springs from wilburusa.com and was woundering if anyone has tried them. I have run progressive springs on other bikes and was very happy. This type of support network was unavailable at the time so I made my decision in the dark. As I change the springs I will be refilling the forks and would like recommendations on forkoil weight. Thanks

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post #2 of 6 Old 03-11-2009, 10:48 AM
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I have Hyperpro progressive springs in the CBR600F4i forks on my 919. I can't be sure right now what strength spring I have, but I found that I needed to set the pre-load kind of soft to allow more travel for comfort.
In other words, It seems I need to let the soft portion of the spring do it's thing for them to function properly.

I plan to die young, as late as possible.
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post #3 of 6 Old 01-23-2015, 02:04 AM
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HyperPro rear spring - progressive

I have 919 only recently. As I was used to more sporty undercarriage, I look for some improvement on that area. I didn’t want to go Pro with replacing whole shock. After some searc online, Ive decided to go with progressive HyperPro front and rear springs package for 195€(shipping incl.)
With original shock on, on faster curves I tend to bump trough rear shock, especially if I had a passenger. I could feel that compression is to soft (nothing I could do about it), and spring as well.
Rear spring was installed with help of my buddy, and its not that easy. As is winter time here, I made only one test ride with original rebound settings and spring on 3rd step (original spring set was on hardest step 7). Static sag was measured 1,5cm – still to much according to Hyperpro manual (0,8 – 1cm), but I felt immediately that ride was improved. I didn’t bump trough rear shock any more, comfort was also not compromised. I took same road for test.
I will left front end as it is, for now; front is not bothering me so much. It is soft, but compression and rebound are doung their job for now. I will replace fork springs after I run few hundred kilometres.
Hornet really rocks

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post #4 of 6 Old 02-14-2015, 02:22 AM
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I hope to install Hyper pro springs and shock next weekend. Will give some feedback.

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post #5 of 6 Old 03-13-2015, 07:27 PM
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I have posted this update in my Hyper Pro thread Mechanical and Technical.

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post #6 of 6 Old 05-04-2015, 11:28 AM
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Update after I have run few hundred kilometres with new Hyperpro spring.

I bought 919 with 15Tkm, with presume that shock should be still ok with that mileage on. I guess I was wrong? – I don’t know how new 919 rear shock should feel? Pretty soft, semi soft?

My goal with rep. shocks spring, was to stiffen the rear end of 919, not as far as RR style, but just a little harder than original; to still retain tour comfortness.

For solo riding, replacing just spring is ‘enough’. You can enjoy sporty ride. Guy with 70kg will not bump trough compression phase so easily, and rebound (fully closed) will stop fluctuation on high speed (>150kmh) wavy corner.
Riding with passenger on the other hand, needs harder compression and rebound than original shock can provide.Only harder spring wont't do it.

For guys descending from sport bikes, with lasting sport desires (and budget issues) – go for fully adjustable Wilbers or similar product + buy your self some wind protection

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