Ohlins Suspension-First video in a series on valving. Putting together a test shock. www.brennershocks.com Instagram @brennershocks theohlinsguy@gmail.com
Hello how are you ? I need help with a rear shock absorber on a 2014 KLR650, I am in the middle of Venezuela and no one makes repairs on these parts in this country. Could you help me repair it? Greetings
I’ve learned so much about these shocks watching your vids. Thanks! I rebuilt an old Noleen mountain bike shock and hand bled it carefully. Even with a new seal head rebuild, I found I’m getting a bit of weepage/leakage where the shaft meets the body. Should I rebuild it again or is it possible I filled with too much oil and there is an initial purge? .... I know, hopeful thinking.
Sometimes when hand bleeding oil just gets pooled on top of the seal head. Might be nothing. Once the gas in in see if there is any play in the shaft. If not you are probably OK. Thanks for watching!
Hi Doug, your video popped up out of nowhere. I'm in Irvine so very close to you. I just got a set of Ohlin R&T for my 2021 BMW M2 Competition. If and when I need servicing done (or revalving), I'll be giving you a call.
Hi. I don't really use any software. I just kind of know what I want to see and mess with it until I get it where I like it. I just have lots of experience but still need to mess with it to get what I want. I have a dyno to see what I have done. I have lots of data stored on my dyno so I kind of know what I have done before to get what I want and I have a starting point. There is no software that tells you what is better or worse that I know of and if you can find one it will be bogus. There is software for Ohlins TTX40s that you can also use with some success on TTX36. Look up Ohlins Valve Referencing Program (VRP). There are a bunch of different shim stacks in the program and last time I looked two valve choices. (linear and digressive) It can get you in the ballpark of where you want to be. I never use two way adjusters (low and high speed) so if you are using single adjustment you can just put the High Speed at about 38 and it usually is close to correct when manipulating the low speed adjustment. Remember that this software just tells you what the damping might look like but not what is better or worse.
I have a 2022 hypermotard SP I've been thinking of re valving I don't ride the track I just simply don't have time for that i-ride Street, and this bike is Harsh as hell on these bumpy roads. So when I first set up the suspension of course I set the SAG and I turned everything out completely to 0 and then slowly started to turn things up. I think I've got it about as good as it gets right now. It does okay at low speed but if I get up about 80 miles an hour on some of these roads it feels like I'm running over parking curbs.
Hi Ali. Best way to stiffen if you don't have any adjustment is to revalve. Let me know what you mean by monotube or inverted. Monotube shocks with a nitrogen reservoir and separator piston (not an emulsion shock) are great if they are valved correctly. They can be inverted
Hi Carlos. I am not familiar with PPS. Where are they located? There are plenty of authorized sellers but not many authorized service centers. I think I am the only one authorized for sales and service between Escondido and Monterey. There are even fewer authorized for Auto and Motorcycle both. You can find the Ohlins authorized dealers on the Ohlins USA website.
Thanks Doug for all the great videos! Learned quite a bit and want to open up my CCJ dampers just for the fun of it. Do you have any recommendations as to how I can loosen the seal head? Ohlins has tool 1626-1 but I can’t seem to find the tool.
I have some 12" travel ohlin offroad coilovers and I haven't been able to find what model they are. So I cant find parts, mabey you would recognize them
Hi Tuan Current racing shocks invariably have an oil reservoir that has a floating separator piston inside and is highly pressurized with nitrogen on the far side of the floating piston. This is necessary to always keep clear oil around the shaft piston. The reservoir has another function which is to accommodate some oil that moves to the reservoir when the shaft is moved into the shock body. As the shock is compressed the shaft and the main piston passes through the oil. Most of the oil moves from one side of the piston to the other. Below the piston it is solid oil. Above the piston there is solid oil and an incoming shaft. All the oil below the piston can’t pass through to the other side of the piston because the shaft is taking up some of the available volume. In addition the shaft takes up more and more volume as it enters the shock. Where does that extra oil go? It goes to the reservoir. To take advantage of this displaced oil, there are some more circuits at the entry to the reservoir that can be used to fine tune the compression damping curves. The reservoir generally has a bleed orifice with an adjustable needle (two-way) and sometimes a device to preload the miniature shims (three-way). Because there is a much smaller amount of oil traveling to the reservoir compared to the oil that crosses the main piston, it is not a good idea to use the reservoir and/or canister for anything other than small adjustments to the compression damping. However, this is still very useful at the racetrack. There are a couple of potential problems with making too much damping at the reservoir. Depending on the particular shock dimensions, the oil that travels to the reservoir is around 12% of the oil that travels across the main piton. If your shock has a reservoir, the total compression damping is the sum of the damping created at the main piston plus the damping from the reservoir. To keep all the shock oil at the same level of stress, don’t attempt to crate more than 12% of the damping curve at the reservoir. A disproportionate amount of reservoir damping will raise the overall oil pressure, which will increase the hysteresis in the oil. I hope this helps. Thanks for watching and commenting!
@@theohlinsguy4649 Thank you very much for your detailed information. I have tried to find the diagram of the STX ohlins suspension (I'm using HO 611 tube), but there's only TTX type available on internet.