What does the oil breather do exactly? There was a thread on it but it didn't really answer my question so I figured I'd just ask.
Like good wine the oil needs to breath, so we....
Ahhh, this isn't a silly question like your other one, I better answer properly.. :)
Its acutally should be called a crankcase breather.
The pressure inside crankcase can can build up because of the pistons going up n down, and gas from the explosion on top of the pistons getting past the rings.
So, the breather is there to release some of that pressure..
Okay so I'm wanting to do a shock from a 999 with a resovoir and I'll have to move it. Is the tpo kit a good alternative?
Thank you by the way.
Are you asking about the part on the engine or the part under the seat? The part under the seat can be removed, and a filter used instead. This is what the TPO kit that I know of does. What they are selling you is a K&N filter, filter oil, clamp and plug for the air box plus instructions. Argumentatively, (big thread here somewhere) small power loss. Trade off is getting rid of a lot of stuff. Have you thought of getting an ohlins or other brand set up for your bike that fits without modification to the bike?
Yeah but an ohlins shock is Atleast 500 and I'm being generous. There is a guy 20 mins from me selling a sachs 999 shock for 35 bucks
Now WHY do you suppose that is? [roll]
because people dont know the value of things?
a local guy was selling a 999S for 400$ on craigslist in portland last week. it is now relisted one town over at 2k. slight rash on a fairing and missing the subframe [bang]
I dont think the OP is suggesting that the sachs is equal to the ohlins, but its probably 35$ better than stock
especially if you can flip your stock S2R shock for the 50-100$ they go for and actually get paid for a mild upgrade
If a Sachs for a 999 turned out to be an upgrade on an S2R which requires different valving and spring rate..., I'd be "shocked". ;D 8)
Without doubt the Sach SBK shock is a better piece of equipment than the stock monster shock.
By the time you make it 'work' for a monster, if you even can buy parts, you'll have half the cost of the Ohlins into it for a new spring and valving.
Long story short...he's better off buying $35 worth of beer.
Well we will see. I'll let ya know how it all turns out :)
new spring is $90-$120 ish. assuming he needs a new one. which it probably doesn't.
you wouldnt be able to get valving for it but you wont even know if its worse until you ride it. at 35$ to buy in, you could give it a shot and see if its worth investing in.
if not, you flip it on CL or ebay for 50-100$ and make a little bit of cash to put towards the ohlins.
If you do put a K&N breather filter on top of the stock crankcase breather, try to put at least a length of hose between the breather and filter.
This volume of air inside the hose (being larger than not having a hose at all) will allow the atomized oil droplets to coalesce along the walls and flow back down the hose and into the engine. It's not as much surface area as the stock box and you will lose the vacuum suction from the airbox (minor I know, but it's something), but a length of hose is better than just a short filter clamped onto the breather and worse than the OE arrangement for oil control.
It'll also make less mess if you use a length of hose. How much hose? As long as you can practically make it, but I've used 6" with good success and minimal mess.
Quote from: xcaptainxbloodx on November 20, 2014, 01:01:31 PM
new spring is $90-$120 ish. assuming he needs a new one. which it probably doesn't.
you wouldnt be able to get valving for it but you wont even know if its worse until you ride it. at 35$ to buy in, you could give it a shot and see if its worth investing in.
if not, you flip it on CL or ebay for 50-100$ and make a little bit of cash to put towards the ohlins.
You should send him the $35.
What is the cost of a re-valve/re-spring of the S2R shock Vs a re-valve/re-spring of the SBK shock? Is there a suspension shop near you that can do the work and quote? Can some of the SBK shock internals be used in a rebuild of the S2R shock? Maybe the shock can be modified for a remote resi/canister? My local suspension guru doid that for me using a Showa canister. Might be able to have your cake and eat it if you're lucky. However...
If the result is good you did well, but if you need to keep going back and refine the shock to your taste then the $$$ add up quickly. If you can rebuild the stock shock for $200-$300 then it ain't too bad over the $600-$700 for an Ohlins. I used to do that kind of thing, but now I just cough up for the Ohlins (or Penske in my case). What amazes me is just how good the Ohlins are straight off the shelf given they're sprung for your weight.
On the breather box, I would try to keep it or at least do what Duck Stew suggested.
Quote from: Duck-Stew on November 20, 2014, 02:06:38 PM
If you do put a K&N breather filter on top of the stock crankcase breather, try to put at least a length of hose between the breather and filter.
This volume of air inside the hose (being larger than not having a hose at all) will allow the atomized oil droplets to coalesce along the walls and flow back down the hose and into the engine. It's not as much surface area as the stock box and you will lose the vacuum suction from the airbox (minor I know, but it's something), but a length of hose is better than just a short filter clamped onto the breather and worse than the OE arrangement for oil control.
It'll also make less mess if you use a length of hose. How much hose? As long as you can practically make it, but I've used 6" with good success and minimal mess.
You got it. I'll definetly do this :) I'll let you guys know how it goes when I do it and I understand it would be easier just to fork uo the money but sometimes a challenge is good for the soul!
I took a 749 shock ($45 ebay) and swapped my stock spring onto it. While no where near a perfect set-up... it is certainly better than it was. I also swapped the adjustable dogbone and added a bit of rear ride height. For the breather, I just plugged the airbox with a part from ACE hardware and clamped a small filter to the end of the hose under the seat. While I was at it I flipped the R/R over and replaced the underseat plastic with a piece of metal sheet (also from ACE, I didn't even need to cut it.) So far so good 8 years later.
Cool sounds good. So your stock shock did work with the new shock. Good to know.
Does the crankcase breather box under the seat need to be removed or is that optional?
I've been doing extensive research on compatibility of Ohlins shock from a different Ducati and fitting it on my S2R1000. I've talked to GMD Boston and Ohlins USA and they both confirmed that a Ohlins DU-8440 from a 998 will work, but it will need to be resprung and revalved. The geometry of the 998 suspension is very different. In addition, even though the DU-8440 have the same free length, the stroke is up to 5mm longer. Ohlins says that I could put a bump stop so it doesn't use the last 5mm but both GMD Boston and Ohlins says I can use the extra 5mm as long as I don't bottom out.
GMD Boston selected Ohlins springs 1091/34, but since I have a 1092/34 already installed on my stock shock, I can use that with no ill effect. 1091 is a 160mm spring and 1092 is a 170mm spring.The 34 denotes 100nm/571lbs spring. I weigh 155 w/o gear.
Cost? I purchased my DU-8440 for $300. Revalve + respring is about $350 including parts and labor.
Edit: I have a S2R 1000
I did exactly this on my 695. Replaced stock Sachs shock with a 999 Showa & ohlins spring. I used the TPO breather kit to ditch the reservoir and made up a plate to take the vertical coil and rectifier.
It made a _huge_ improvement to the bike's handling. Much recommended.
did you have the shock valving changed?
No, the stock valving was fine. From memory I'm only two or three clicks off the nominal 999 position.