Ducati Monster Forum

Moto Board => Tech => Topic started by: Privateer on August 28, 2008, 04:54:50 PM

Title: rear shock interchangeability
Post by: Privateer on August 28, 2008, 04:54:50 PM
I tried searching but maybe I didn't do it very well.

Could someone point out an online resource that will help me figure out what shocks from what bikes I can fit on my 04 620?  Bolt up.. I can't do any fab in my garage.

Upgrading the front/rear suspension is my next step.  I have a line on some S2R1000 forks so i have that covered.  I would just like something equal with more adjustability than what I have now.  I know what I can get new from ohlins and penske, but hoping to find a lower cost option that will be "good enough."


Thanks in advance.
Andy
Title: Re: rear shock interchangeability
Post by: Speeddog on August 28, 2008, 05:26:04 PM
'01 S4 and all '02 and later non-S*R shocks will bolt up.
I *think* S2R shocks will bolt up.
696 shock will not work AFAIK.

Other than S4 units, I don't think the above listed ones have any more adjustability than what you've got.

I've got an '02 S4 shock if you're interested...
Title: Re: rear shock interchangeability
Post by: Privateer on August 28, 2008, 06:31:41 PM
Quote from: Speeddog on August 28, 2008, 05:26:04 PM
Other than S4 units, I don't think the above listed ones have any more adjustability than what you've got.

I've got an '02 S4 shock if you're interested...

yeah, adjustability is what i was looking for, my #1 criteria.

thanks for the info, and PM coming.



Andy
Title: Re: rear shock interchangeability
Post by: He Man on August 28, 2008, 08:20:21 PM
I have a 749 fully adjustable shock if you want to try to put that on. My friend just bought the same shock and hes gonna attempt to install it on his 695. Should fit fine.
Title: Re: rear shock interchangeability
Post by: Capo on August 29, 2008, 02:52:37 AM
Didn't the 749 come fitted with a Sachs unit?
Title: Re: rear shock interchangeability
Post by: He Man on August 29, 2008, 08:45:22 AM
Quote from: Capo on August 29, 2008, 02:52:37 AM
Didn't the 749 come fitted with a Sachs unit?

yes, but its fully adjustable non the less. i found out the showas are a pregnant dog to come by.
Title: Re: rear shock interchangeability
Post by: Privateer on August 29, 2008, 09:48:56 AM
I was pricing out ohlins and penske rear shocks.. and thought wow, if I could find a "take off" that would be ideal.. so, wanted to see what I could find off which bikes that would just bolt on without a bunch of hassle.  Even a remote res i could deal with, but beyond that.. blah. 

I have a line on a S2R front end, so going to get that resprung (210-215 pounds without gear), and get a rear hopefully somewhere. 

I'm really happy with my bike, despite the "small" engine.  I'm really unhappy with the suspension tho.  Never feels planted.  Seams in the freeway concrete beat me to death.  So before anything cosmetic gets paid for, i want to bring it up to snuff mechanically.


Andy
Title: Re: rear shock interchangeability
Post by: He Man on August 29, 2008, 01:55:05 PM
Quote from: Privateer on August 29, 2008, 09:48:56 AM
I was pricing out ohlins and penske rear shocks.. and thought wow, if I could find a "take off" that would be ideal.. so, wanted to see what I could find off which bikes that would just bolt on without a bunch of hassle.  Even a remote res i could deal with, but beyond that.. blah. 

I have a line on a S2R front end, so going to get that resprung (210-215 pounds without gear), and get a rear hopefully somewhere. 

I'm really happy with my bike, despite the "small" engine.  I'm really unhappy with the suspension tho.  Never feels planted.  Seams in the freeway concrete beat me to death.  So before anything cosmetic gets paid for, i want to bring it up to snuff mechanically.


Andy


The majority of the reason why the bike doesnt feel planted is within the springs. Get stiffer springs and your bike will be MUCH better. valving and shock/fork design fine tunes that experience.

Make sure you are getting S2R 1000 forks over S2R forks. S2R forks are just as shitty as 695/620 forks. If you wanna go cheap and good route just changing out the fork springs will make a huge difference. As for the shocks, trust me on this one, you will not find a penske or ohlins take off for the price youd  think you should get one for. Ive been searching for 2 months now. You can get a penske or matris for about 800 bucks (700 for penske) which is one hell of a deal. If you look around you can get an ohlins for ~$900 range, but most are in the $1,000s. I dont think either shock will be useful due to the fact that you could never push the shock to its full potential. You cant lean a monster or put the monster in situations where the shock was designed to be put into. You'd have damn hell a lot of fun trying though. lol thats my main reason for trying to do a 999 swap. but like a dumbass i bought the sachs version of it over the showa. Both are fully adjustable, and both are better than stock, but showa is better, if you can get your hands on one. you can see my ad in parts for sale.
Title: Re: rear shock interchangeability
Post by: Privateer on August 29, 2008, 05:51:02 PM
Quote from: He Man on August 29, 2008, 01:55:05 PM
The majority of the reason why the bike doesnt feel planted is within the springs. Get stiffer springs and your bike will be MUCH better. valving and shock/fork design fine tunes that experience.

Make sure you are getting S2R 1000 forks over S2R forks. S2R forks are just as shitty as 695/620 forks. If you wanna go cheap and good route just changing out the fork springs will make a huge difference. As for the shocks, trust me on this one, you will not find a penske or ohlins take off for the price youd  think you should get one for. Ive been searching for 2 months now. You can get a penske or matris for about 800 bucks (700 for penske) which is one hell of a deal. If you look around you can get an ohlins for ~$900 range, but most are in the $1,000s. I dont think either shock will be useful due to the fact that you could never push the shock to its full potential. You cant lean a monster or put the monster in situations where the shock was designed to be put into. You'd have damn hell a lot of fun trying though. lol thats my main reason for trying to do a 999 swap. but like a dumbass i bought the sachs version of it over the showa. Both are fully adjustable, and both are better than stock, but showa is better, if you can get your hands on one. you can see my ad in parts for sale.

thanks for the tip.  yeah, i wasn't planning to find an ohlins or penske.  I was hoping to find a factory sachs that someone swapped out for an ohlins or penske.  Looks like Nick has one though.  I had originally planned to just re-spring the stock 620 fork/shock, but then when the S2R forks came into the picture, figured I'd try to upgrade the rear a bit too, as well as respringing.

and yes the front end is off a S2R1000.  one of my buddies is one of those guys who always has like 3 projects going at once and this was something he picked up and isn't using now.  I'll need to get my triples modified to take the forks, apparently, but that'll still be cheaper than any other option.

Andy
Title: Re: rear shock interchangeability
Post by: Speeddog on August 29, 2008, 06:00:06 PM
Triples modified  ???
Title: Re: rear shock interchangeability
Post by: He Man on August 29, 2008, 08:08:32 PM

S2R1000 forks will bolt right on
Title: Re: rear shock interchangeability
Post by: Privateer on August 29, 2008, 10:50:21 PM
Quote from: He Man on August 29, 2008, 08:08:32 PM
S2R1000 forks will bolt right on

hmmm maybe I misunderstood what he had.. here's what he told me:

Quote
I have a set of Showa 53mm's in my garage. they have a larger upper triple diameter than the Monster. You need to bore out the top triple unless you want to buy a billet upper.

I'll check with him and see what the deal is.  not off an S2R I suppose.


andy
Title: Re: rear shock interchangeability
Post by: Speeddog on August 29, 2008, 11:08:57 PM
Assuming they're from a Ducati, those would be Superbike forks.

Make sure the caliper bolt spacing is the same as your brakes.
It would require either an aftermarket triple or boring out your existing triple.
Also needs a shim to adapt to the lower triple.
A bit more work, but a good upgrade.
Title: Re: rear shock interchangeability
Post by: Privateer on August 30, 2008, 01:28:31 PM
Quote from: Speeddog on August 29, 2008, 11:08:57 PM
Assuming they're from a Ducati, those would be Superbike forks.

Make sure the caliper bolt spacing is the same as your brakes.
It would require either an aftermarket triple or boring out your existing triple.
Also needs a shim to adapt to the lower triple.
A bit more work, but a good upgrade.

yeah i actually was coming here to post that they were SBK forks.  boring out/shimming the triple wouldn't be too bad, as I know some place that can do it.  but yeah, I didn't think about the caliper spacing et al, thanks for bringing that up.
But would my front wheel fit?  Would the bars still work?  I thought SBK forks were 'taller' which would require clip ons.  Like I said, i want to get this done relatively inexpensively.  If it's too much work, I'll just wait for some S2R forks to pop up, and get some stiffer springs for my stock forms in the mean time.

Andy
Title: Re: rear shock interchangeability
Post by: Speeddog on September 02, 2008, 10:28:22 AM
Overall length of the upper fork legs, from the bottom of the scraper/seal to the top of the cap or adjuster-

SBK forks: 20.5"
Monster adjustable showas: 19.5"
Non-adjustable Marzocchis: 18.5"

The above are 65mm caliper bolt spacing, 25mm axle models.
The axle holes are 30mm on the big end, 25mm on the small end.

Not sure if all SBK forks are 25mm axle or not.

Just did two swaps of adjustable Showas, into M620 and S2R800.
Bar to adjuster clearance was tight.

AFAIK, you would need bar risers or clip-ons for the SBK forks.
Title: Re: rear shock interchangeability
Post by: mmakay on September 02, 2008, 06:34:12 PM
The good news, of course, is that SBK forks allow you to run clip-ons above the triple without sacrificing your geometry.  That opens up a million (no, a TRILLION!  ;D ) options for low cost clip-ons, because you don't need any rise to keep the bike reasonably comfortable.
Title: Re: rear shock interchangeability
Post by: Paegelow on March 02, 2009, 06:25:00 PM
Quote from: He Man on August 28, 2008, 08:20:21 PM
I have a 749 fully adjustable shock if you want to try to put that on. My friend just bought the same shock and hes gonna attempt to install it on his 695. Should fit fine.

Bringing this one back from the dead...  He Man, any confirmation on whether or not that 749 shock actually fit on the 695?  I've seen a few 749/999 shocks for sale lately.  I have a 695 as well and I'm looking to upgrade!
Title: Re: rear shock interchangeability
Post by: He Man on March 02, 2009, 08:07:38 PM
not yet shock is still sitting at my friends house. we were gonna swap shocks. i have a 1098 showa on hand.
Title: Re: rear shock interchangeability
Post by: ducpainter on March 02, 2009, 08:33:43 PM
Even if a SBK shock 'fits' it won't work right.

The linkage geometry on the SBK and monster is totally different. SBK stock spring is about an 8. The stock rate for an Ohlins on a Monster is a 9.5 and you don't have to be very heavy to need more.

Add to that the fact that valving and spring rates go hand in hand I don't think you'd be any better off.
Title: Re: rear shock interchangeability
Post by: He Man on March 02, 2009, 09:09:11 PM
+1

I happen to be 165lbs gear up. According to the Ohlins website, a stock 999 SBK is  a 6.93 (if your going by Kg/mm. Recommended for my weight is 8.66. Its not a lot and i think with a new spring, the improvement will be well worth the $20 shock and whatever the cost of the spring is.

at the same time, if your significantly heavier, youll see an improvement with just a spring on your stock shock. Friend went up to approriate shock on a 695 (i think hes ~180lbs without gear) and he said its much better than stock. At that point I dont think going the SBK swap will do much... it might, you never know. Ask Monstermash since he has tried the 999 shock on his S2R1000. Im not sure if he swaped the spring when he tried it or how much he weighs.

All the fluid needs to move much quicker, so you COULD port them i guess. I have a friend who revalved his forks with a drill press on his GSXR-600 and said his improvements were amazing....really he just copied the porting design off a racetech valve! I wouldnt recommend that unless a shop is going to drill it for you, or you have balls to do it yourself.

Racetech sells valves for the 999 showas...the costs is about ~$150 last i checked, though for the cost of rebuilding the damn thing and buying new shocks...id much invest it toward those discounted on sale penskes or matris you see on motowheels or oncycles. you get a hell of a lot more adjustment out of them not to mention they come valved and sprung for your weight.

Also, the SBK shock actually doenst 'fit' you have to do some tweaking to get it to fit there cleanly. the rear coil adapter and the breather box gets in the way.
Title: Re: rear shock interchangeability
Post by: Paegelow on April 02, 2009, 04:40:41 PM
Quote from: Speeddog on September 02, 2008, 10:28:22 AM
Overall length of the upper fork legs, from the bottom of the scraper/seal to the top of the cap or adjuster-

SBK forks: 20.5"
Monster adjustable showas: 19.5"
Non-adjustable Marzocchis: 18.5"

The above are 65mm caliper bolt spacing, 25mm axle models.
The axle holes are 30mm on the big end, 25mm on the small end.

Not sure if all SBK forks are 25mm axle or not.

Just did two swaps of adjustable Showas, into M620 and S2R800.
Bar to adjuster clearance was tight.

AFAIK, you would need bar risers or clip-ons for the SBK forks.

OK I'm revisiting this thread again.  Thinking about swapping in some superbike forks this time.  So the dimensions we have to worry about are the triple clamp diameters, caliper bolt spacing, and axle size, right?

I'm looking at a 748 fork right now and wondering if it would work.  Dimensions are as follows:
Triple clamp diameter = 53mm
Caliper bolt spacing = 65mm
Axle dimaters = 30mm (big end), 25mm (small end)

So would everything bolt right up on my bike ('07 695), except the triple clamps?  Would I have to only modify the upper triple clamp, or both?  Will my existing brakes and wheel still work?
Title: Re: rear shock interchangeability
Post by: Speeddog on April 02, 2009, 05:00:13 PM
Typical routine is to bore out the upper triple, or fit an aftermarket one with the correct 53mm bore.
Shimming the lower triple is the standard method.

Going to need bar risers or clip-ons, IMO.

Your front axle will not have the holes in it to access the compression adjusters, so either get an axle with the holes or drill 'em.
I'd recommend just getting the axle with holes...

I think you're OK on the rest of it.

Those forks will likely be sprung pretty stiff, regular 748's came with 1.0 kg/mm springs.
Unless you're in the vicinity of 200 lbs, respringing would be a good idea.
Title: Re: rear shock interchangeability
Post by: Paegelow on April 02, 2009, 05:07:48 PM
Cool, thanks for the quick response!

What do you use to shim the lower triple clamp?

So, my existing brakes would work with those forks, right?  The rotor diameters should be the same?
Title: Re: rear shock interchangeability
Post by: mookieo2 on April 02, 2009, 05:26:29 PM
Quote from: Paegelow on April 02, 2009, 05:07:48 PM
Cool, thanks for the quick response!

What do you use to shim the lower triple clamp?

So, my existing brakes would work with those forks, right?  The rotor diameters should be the same?

Unless you get older 748 forks. Some have 40 mm spacing instead of the 65mm like on the monster. This was my case but luckily the friend who gave me the forks was finally able to find the brakes.


Wouldn`t a 748 rear shock fit better, since the reservoir goes down on  an angle where as the 749 comes straight out requiring removal of the breather and regulator moved? I was going to try this. According to Ohlins USA chart, the monster and 748 shock as are both 305 mm length. If re-sprung to the correct spring wouldn`t this be a better option than a stock monster shock?
Title: Re: rear shock interchangeability
Post by: Paegelow on April 02, 2009, 05:41:52 PM
I just did some research, and it looks like my 695 has 300mm rotors and the 748 had 320mm.  Would that mean my calipers wouldn't work, and I'd need calipers to fit the larger rotors?
Title: Re: rear shock interchangeability
Post by: erichan8757 on November 18, 2009, 08:13:21 AM
Quote from: Paegelow on April 02, 2009, 05:41:52 PM
I just did some research, and it looks like my 695 has 300mm rotors and the 748 had 320mm.  Would that mean my calipers wouldn't work, and I'd need calipers to fit the larger rotors?

an old link ,
but did not see anyone reply,
I am currently embarking on this part.
According to He man and my friend , One have to get a bigger set of
rotors. therefore i just went ahead to put order a set of wave.
My friend had the same set up as my, thought I upgraded my
caliper to 4 piston as well.
but i think the rotor has to go up.

there are many rotors that would fit on  a 620 i think other will come in with
answers.

e.
Title: Re: rear shock interchangeability
Post by: He Man on November 18, 2009, 10:22:57 AM
i said if you go with S2R1k rotors, you need new calipers to match due to the size and offset.

if you ordered new rotors, you should make sure they are the right size and offset for the calipers you are matching them too as well as bolt patter on your wheel. Also, since the brakes are much larger, id also say go ahead and get new masters with it.

Dont forget about brake pads to make sure the ones you have in your new rotor arent old and worn.