M900 suspension question

[scott_araujo]

No, front and back are different.  Check the link I posted.  And those are a starting point, not carved in stone.  It also has to feel right to you but if you're way outside that range chances are something is wrong.

Scott

[junior varsity]

static seems wrong. i need to grab a book and look.

[scott_araujo]

Someone recently posted a mini sertup PDF.

[Michael]

What is a good range for the front?

[koko64]

Thanks for the advice guys.

Both front and rear sag are good.

I'll be seeing my suspension guy asap. I will ask him about the spring rates being optimistic. Time to fix it.

Cheers
Tony

[scott_araujo]

Duh!  Posted the wrong link.  Will fix it later.

[koko64]

Just to clarify guys.

By rider sag I mean the total sag with the rider on the bike. So for the shock, the bike sinks say 8 mm without the rider and sinks about 33 mm with the rider. What I am refering to as rider sag is not the subtracted number. If you are taking the rider contribution to sag as 25mm then you are technically correct. My apologies as I'm giving the rider sag as the total sag number the "slack" way.

My mates and I have a "spring bank" as we keep all our springs from different bikes we have owned. This includes road and race bikes. I will see if I can withdraw 0.85's for the forks. No harm in testing and the weight of opinion is 0.85 for the forks (which is what I had in my Superlight). I will cross examine my suspension guy as to why he felt 0.95's were appropriate!

As for the shock, I will get quotes for revalving Vs replacement. The Aussie dollar is better against the Greenback than the Euro, so Penske would be the replacement shock I guess.

I will update with results.

Thank you all for your help and suggestions. It's great when riders on the same bike can compare data.
Thanks again.
Tony

[scott_araujo]

The correct link for suspension setup: http://www.ohlins.com/Checkpoint-Ohlins/Setting-Up-Your-Bike/Underrubrik_1/

Scott

[junior varsity]

i love my penske.

[Michael]

[brad black]

i have .85 springs in the front of mine.  maybe they're cut down originals that check at .85, i forget now.  .95 is what i have in my 851 with a lot more front bias.

one of the local suspension specialists recommend 8.0 spring in the back of a monster, which sounds very light to me.  but one owner has it and loves it over the std, which is actually harder than that.  you could also run a showa rear shock from an 851 or 888 if you can find one, but it also needs rebuilding.

[ducpainter]

I run .85 in front, but I have a 10. in the rear on an Öhlins. I had an 8 at one point on the stocker. I didn't like it. The damping was harsh.

[koko64]

Thanks. I have that Ohlins set up guide. It's nice and simple. I'ts the one I use.

I agree. I tried an 8.5kg spring on the shock and I couldn't get the sag numbers right for it being too soft. I'm 80-85kgs (180-190 lbs). That guy Brad mentioned may be lighter than me. I used a 9.8 kg spring and the numbers came good.

I will call a few mates and try to get a 0.85 spring to try.

[koko64]

Had a detailed discussion with my suspension guy.

We are going to fit a gold valve or equivalent piston and adjustable remote canister to the shock. My tuner feels that "providing greater gas volume will allow for more potential to tune the compression damping without excessive oil cavitation."

I can get rebuild and revalve with remote adjustable canister for $300-$400-00. It was at least $1500-00 for a new Ohlin's. I would pay half that at least without a re-valve for a used one.

After the rear end is sorted out, we will turn our attention to the front springs. My tuner's rationale for going with the heavier springs on a bike with a rearward weight bias, was to account for fork dive under braking (he does my NC30 400cc race bike). He also knows I try to get over the front of the Monster when riding harder.

Once I am happy with the rear I Will re-evaluate the front end and try 0.85 springs, and play with the oil level/air gap (they are re-valved already). I will consult him as I test.

I'll report back with my progress.

[junior varsity]

Hmm. That Ohlins price seems off. $1,500 USD? That's nearly double or so more than what I would expect to pay - $750-1,000, and only a respring would be necessary, no revalve of the ohlins. That being said, the racetech g2r revalving or whatever the equivalent for the shock would be loads cheaper still.