Recipe for dirt monster

[sailah]

Are you going to keep the stock swingarm or go longer?

There's a wrecked m900 monster in OK clist right now that is just begging to be scooped up...bad sailah, BAD BAD do NOT THINK THOSE THOUGHTS...

Someone buy it before I look how far OK is from Pittsburgh...

[Wadester]

Originally Posted by sailah

Are you going to keep the stock swingarm or go longer?

Originally Posted by Wadester

Lot's of clearance at the front - not.



That was with the adjuster almost to the front, but still. A swingarm stretch is needed for clearance, even if I didn't want to balance the front extension.

There's your answer. I've found a couple of 695 swingarms cheap on Ebay ($42 shipped for one of them!) and will be making one out of the two. I need a minimum of 2" for tire clearance, but it looks like this approach would allow up to 5". I'll make my decision based on overall balance of the chassis.

[sailah]

I'm very interested in the swingarm and how you decide to section it up for extension.

I tried this on a cbr swingarm but never installed it in favor of a ktm unit that was set up for the pds system and shock already. Since the ducati needs to mount outboard of the motor the ktm swingarm wont fit.

I've been looking for monsters to do the same project, the 695 looks like a great candidate with quite a bit of power from a air cooled engine and 370#

[desmo916sp]

http://www.advrider.com/forums/showthread.php?t=428685


OldDog did this build a few years ago and ended up selling off the bike .... and just baught it back ... have been working on a similar bike but used a Elefant frame area for suspension / swingarm support (page 8 )... where do you live..?

[jerdog53]

Where are we at with this?

[Wadester]

"We" are currently sourcing a new frame to replace the one that was broken by getting "hit&runned" a while back:


http://www.advrider.com/forums/showthread.php?t=804583

It's also still a bit warm to do much out in the shop, temps in the mid 90's up to the 100's. And still recovering from blunt trauma to the shoulders due to the hit.

I'm mostly planning and looking for parts. I've got the XR650R front, but I've been contemplating a KTM/WP front. Need to decide so I can start on wheels. It looks like a KTM type rear wheel is already part of the plan (cush hub is a part of this) but I want to get a matched set - perhaps with color? Red rims, black hubs? Red rims, red hubs? A part of the front decision is single or dual disc. WP forks can go either way, but I've seen some dual disc bikes converted to large rotor single disc - haven't seen a single to dual conversion yet.

[OldDog]

Heya Wad, looks like you're doing a good job there! I see some of the guys have already posted up links to my similar, i hope it helps you with yours! Oh by the way, something to consider instead of welding up an extended swingarm, you could consider using a standard Paso 907 alloy swing arm and mount system. The Paso is longer as you want and has bearings in the end of the swingarm instead of using the bearing in the engine case. Makes for an even more rigid maounting of the swingarm pivot area. If you need any help i'm happy pass on what i've learnt.

As Desmo says i bought the bike back and for a very good reason, this conversion makes a bloody good all round and unique bike with loads of character. You're gonna enjoy this!

[Wadester]

Thanks for the info! I had already scoped out your build before starting - but didn't recall this trick. I found this pic of ST4 vs Paso 907 swingarms:

[Gummee!]

IIRC the swingarms in the Terra Mostros were from the Multistrada but 2x check me.

M

[Wadester]

First off - some progress!

Unbroken and straight - and Red!

After some checking & thinking - no, the Paso arm looks the same length and would require major suspension mods to the frame. OTOH, the Multistrada 620 has the same suspension hookup - which not only fits the frame, but allows ride height mods w/o messing with the preload (once you get an adjustable tie rod, which I have).

The Multistrada arm does have bearings in the arm vs the Monster with bearing in the engine cases. There are outboard attachment points on the MS frame for the pivot axle - but I don'tthink the axle also passes thru the cases (looking at DucatiOmaha parts catalogs) No bearings listed, and the case doesn't appear to have the thru hole - meaning the arm pivot was behind the cases - longer wheelbase, but not necessarily longer arm. Hmm.
620 MultiStrada:


695 Monster:


Looks like the suspension mounts are further back - and maybe it is longer overall, but the length is all at the front. I'm going to stick with original plan, I think.

[Land]

Originally Posted by Wadester

It's also still a bit warm to do much out in the shop, temps in the mid 90's up to the 100's.

Quit bein' a wuss, Wade! Get out there and wrench and sweat!







Seriously, I hope that you're mending well.


Chris

[HappyRiding]

[DR. Rock]

Originally Posted by HappyRiding

Oh, I can attest; He's got some bones to chew on.

[Wadester]

Some minor progress:


Next step is to build a cradle to hold the bottom of the motor so I can take the munched front end off! The cradle needs to keep the exhaust, oil filter and drain plug clear while supporting the engine case.
After that, it's time to strip the dead frame off and get the "new" one in place.

[Wadester]

Got some progress this weekend! I built a wood cradle so I could put a jack under the engine cases, then proceeded to strip off the front end:



The funny part was that not only are the frame and both fork legs bent - so is the front axle:



Got a ways to go before the new frame goes on.