Wildguzzi.com
General Category => General Discussion => Topic started by: cmgies on February 23, 2016, 07:22:24 PM
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Looking around on the site I couldn't seem to find the approximate amount of fork oil that the 2013 V7's take. Any thoughts? I'm in the middle of a front end upgrade and want to be ready with the fork oil for when the parts arrive.
Thanks!
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150mm below edge, tube extended
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150mm below edge, tube extended
Now I'm really confused. I had read about how to do this with the measurement method, but it seems to me everything I have read, including the shop manual, says that you should have the fork compressed when measuring the oil level.
It says "Oil level (from sleeve rim, without the spring and with the stem at the end of the stroke) 150 mm.
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Damn that's a confusing statement
Every bike I've worked on, except bikes in the 60a and early 70s, measure the air gap with the tube compressed w/o spring
The manual says 150mm , 6inches and I just assumed that is with the tube compressed
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My 2003 Bonneville fork oil was measured with spring removed and fork compressed. Leave it to Guzzi to say 'at the end of the stroke,' but then not defining which end, extended or compressed. :azn:
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From memory, the 150mm air gap equates to around 400ml, each leg. So a 1 liter bottle does the job. Do they sell fork oil by the liter in your neck of the woods? I am about to confirm that soon, the oil in the Special feels like it needs refreshing.
I can't remember whether the tube was pushed in or pulled out. I will have to check the carious instructions I followed, because whatever I did, it worked a treat.
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MG recommends 5-20 motor oil for the forks or 7.5 hydraulic fluid (fork oil)
I remember that early long travel USD forks on some MX bikes used 5-20 oil successfully
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Remember that the air gap is part of the progressive resistance of the suspension. If you measure air gap with the fork compressed and allow 150mm air gap you will have a huge air gap to compress when everything is back together and the forks extended. In other words, you'll only get about a 2:1 or 3:1 compression ratio...not enough to make much difference. The thing is that you don't want so little air gap that the forks are locked up before full travel. I settled on 130mm air gap as best for me. Suspension settings are on the order of a black art, there are guidelines but they are just a reference point. Oh, and I'm NOT a suspension expert.
Peter Y.