2v SBK build thread

[TAftonomos]

All nice stuff, but all way more than I'd be willing to pay for looks.  I could never figure out if Durbahn made the stuff for K, or if they made it for him,...

In any case, a simple headlight up front is looking much better (and cheaper) than spending 6-700 for a small half fairing (by the time it gets shipped and painted).

Other idea was getting a top half 999 fairing from catalyst, and mounting it up/trimming it down until I got something I could use.  Use a HID projector w/high beam for the single headlight, and paint.  Prolly have 500 in it total after painting, and easier to replace should something get smashed/crashed.

[Raux]

kinda like i'm doing with the 848 fairing

[Monstermash]

Whats up Theo? Anything new to report on this build?

[Raux]

Already found one problem, going to need a machinist to fix this one:



Motor is from a 04 multi, so it bolted right up to the frame, and the width is correct.  What does not seem to be correct is the spacing between the rear motor mount bolt and the swingarm hole.  The 999r motor measures approx 4.25" between the spots, whereas the ds motor is 4.00.  You can see how the swingarm bolt appears to be centered, where it needs to be a bit lower to fit using the 999's pivot bolt blocks/washers.  I'm hoping I can find someone to machine some new ones.

isn't the rear mount point that way to adjust the handling of the bike. ie you can raise or lower the rear with the eccentric up or down? loosen the front mount and pivot the frame on the motor to mount?

[TAftonomos]

I've made minimal progress, just waiting on money at this point....

The swingarm pivot is non adjustable believe it or not, the case is only bored out enough to allow it in one spot.

I have talked with the german guys about how to locate the arm, they all say to machine the case.  Currently the pivot is too high, which will change the geometry.....but I"m not sure which way it would change it, nor if it would be bad or good.  A while back I found some RS 999 parts that actually RAISED the swingarm pivot, which is another mystery....unless the RS case was slotted.

The motor has to come apart anyway, so I need to decide on machine the cases, or machine a new locate tab, and go from there.  Since that is the next step, and it's going to cost me around 3k to have it done, I'm waiting on funds.....   Having to buy a new family SUV didn't help either.

[junior varsity]

The RS frame is/was nothing like the regular 999 frame. We've got Toseland's factory race bike at the AMS Alvarado shop, and the thing is nuts - parts of the frame are removable so you can take out the vertical head without dropping the motor, and that's not even close to the most crazy parts

[1KDS]

isn't the rear mount point that way to adjust the handling of the bike. ie you can raise or lower the rear with the eccentric up or down? loosen the front mount and pivot the frame on the motor to mount?

There are two other motor mounts so there would be no movement at the swinger pivot

[TAftonomos]

I've seen the peirbon frame up close and personal, it is pretty cool.  The removable part you speak of is additional bracing the 999 frames don't have.

It's not the frame I'm curious about, but the engine case.  If the RS case is slotted, it makes sense why the lower fitting is ovaled like it is....it would allow changes in the pivot height for setup.

[Raux]

you had the 999r motor right?

did it have the oval hole like you say?

here's a pic of the RS motor.. just a lower mount. so, just make new side plates to match your motor.

[TAftonomos]

I need to see how raising the swingarm up will affect the geometry of the bike before I do it.  The pivot hole is just bored in a different spot on the cases (at least from the 999r motor to a multistrada motor).

It would be much easier to just make new side plates, but it might not be the right way....

I suspect that raising the pivot point will affect the anti-squat a good amount, but since we arn't dealing with a fire breathing 200hp motor.....it might not translate into a problem. 

[Speeddog]

Changing the pivot height does effect the 'squat' character.
I don't think it's a big deal on a streetbike, but I've never had a bike with the facility to alter that...

I suspect that it's possible to machine the case to accept an oval spacer like the frame, so you could adjust it if you want.

[junior varsity]

i think the oval marking that you are describing, on the engine cases, is what i noted in my thread: the superbikes are drilled at the top and the 2v were drilled at the bottoms (or perhaps i have that backwards) - My solution was to source some 996 engine cases to migrate everything into - convenient since I'm splitting the cases and pretty much building the motor from the bottom up.

the 996 cases have the same cylinder stud spacing and you only have to drill a new locator pin hole in the cylinders for them to be squared up. So far, it looks like a pretty straightforward migration. I originally wanted a "deep sump" air cooled 2v, but no dice - the cylinder base gaskets showed that they were quite different.

for reference, i'm using an 02 900SSie motor.

[truckinduc]

my 95 m900 appears to have the hole bored in the center.  I just narrowed it because im copying the sbk style frames.

[1KDS]

The monster and ss's (at least) are pretty close to center of the oval but sbk's are maybe 3/16" lower, enough to piss you off and cause problems

[junior varsity]

yes, that's what i remember finding out.