[SBK Project: 2v Motor - 748/996 era Frame]

[junior varsity]

Ooh, very interesting. I'll check in with you soon. Need to see if my ol' buddies at IMA SrL can whip up some beefy billet stuff too. That, and I need to do some reading about offsets to see what I want for a mostly-track toy.

[1KDS]

Seems like a lot of guys really like the 27mm offset for the track, mine are stock pieces, 36mm?

[Christian]

Wow, I just found this thread! This is very similar to a build I started a while back but have put on hold because of a cross country move.

I picked up a 900 motor and various 748 parts. I'm not sure why you're having a mounting issue, my motor bolted into my frame no problem:



I did notice the difference in swingarm mounting and subsequent case width. It sounds like you're thinking of putting the 900 internals into 748 cases?

I picked up a set of 748 cases on the cheap to examine that possibility.

I'm definitely tracking this build. I'm not sure how much help I can be - you seem further along at this point than I am.

[junior varsity]

The issue I found was not with the motor mount holes, but with the swingarm pivot holes lining up from the frame to the engine - the M900's holes were too high by a smidge.

my 748 cases are visible lower on the faces where the pivot hole is machined. Its like an oval, and on the Monster's cases the hole is at the top of the oval, and on the SBK's, its at the bottom.  Without throwing the swingarm pivot "axle" through, the frame and motor had bolted together just fine.

Problem is, I've run out of funds for a bit so things will slow down. The truck I drive ('01 Tahoe with plenty more than 200,000mi that I lovingly call Big Red. Or the Big Red Death Sled) had some ignition issues crop up. which prompted not only new wires and plugs but while i was crawling around the insides of this fine General Motors vehicle, I decided that since I liked the "oomph" that DynaCoils gave my monster, I could probably find something similar for the truck. And I did. Problem was, they weren't as cheap as a pair of dynacoils - especially when there are 8 of them.

Which is fine, I have some hands-on work to do now, like prepare to move things from one set of cases to the other. Go through and make a long list of needed bearings throughout, etc.  Do some more reading about the setups of the insides of the motors and the chassis of the superbike. Still need to learn about doing the air-gap sensor as the ignition pickup from the timing gear, and investigate the MotoGadget M-Unit for a "fuse box" like device, and decide if i want to put taillights and a headlight on it to run on the streets now and again. I much like the idea of a race-fairing, with a projector light of some type stuffed into the air duct opening. Conveniently hiding the wiring in the air duct as well.

[Christian]

Ah yes - I did notice this as well. The cases on the SBK motors are narrower where the swingarm is as well as being lower.

My plan was to grind the cases down to the proper size and drill the pivot point hole larger, then add an offset-drilled insert. Or something to that effect.

I thought about adding the 900 motor internals to the 748 cases but I'm not 100% sure of the differences. The water jackets are just in the heads, right? Maybe it would be a direct bolt in scenario.

Are you planning on doing fuel injection? I was going to do split-style FCRs to mitigate some of the clearance issues in the frame, but that cross brace would still need to be modified or removed. Still, it's similar to the 888 vs Monster setup. The 888 had the cross brace and the Monster didn't. Both are still safe.

[1KDS]

Wow, another one!  I think your idea on the offset insert is a good one.  Mine was machined down to SBK width and the lower mounting hole ovaled out but it originally had nothing else, I like the idea of the insert and may make one before reassembly.  I'll post a pic of the cross brace later that may help both of you.

[junior varsity]

yes please!

[1KDS]

Cell pic, but you get the idea.  This setup does clear the stock SS TB's

[Christian]

Interesting! One question - are you going fuel injected or carbureted? The stock cross brace looks like it holds something - I don't have a stock 748 to check. I *think* it held the coils. But maybe they can be relocated?

As for the pivot point - you oval-ed out the hole and left it as it? Have you mounted the swingarm? Is there too much play there? My thought was just to get a solid steel or aluminum lug and stick it in the oval-ed out hole, and then drill the proper hole for the pivot bolt.

Once I get my parts back from storage on the west coast I can start my project again.

[junior varsity]

I'm going to be putting the coils right the heck up around the headstock. That's the plan currently at least. Mine will be carbed.

Looks like the hole things been chopped out and replacement tubing has been welded in. That's probably my plan too. Get all the necessary ingredients, see how much i have to cut, check clearances, cut, assemble without cross braces, mock up where braces would go under "full assembly", and disassemble for welding 'em in.

[1KDS]

@ato
Yes it's all been removed and replaced

@Christian
It will be fi.  The coils were there but I have a battery box to hang them on now.  Yes, the pivot was ovaled and ran as is for 3,000 miles by the PO.

[junior varsity]

Here's an interesting, perhaps humorous tidbit.

The frame I have is bare. None of the small necessary hinges or anything that bolts to it is on either the frame or subframe.

So I thought, I'll eventually need to get things like the seat hinge bracket and latch, and the related parts. I was playing around on eBay, hoping for a gem and I found an ad by Motorize.de --> A machined latch which doesn't use the hinge pins that the OEM model uses, supposed to make swaps a breeze. Well, I figured since I didn't have any hinge at all, and this would do the entire job and was factory new, might as well give it a go.

So I emailed, bargained a bit, requested the seat latch "male" end as well. Saw that they had billet rear brake master cylinder mounts - wanted one of those too. Thought that was "plenty" seeing as how I am taking a bit of a gamble across the pond with a parts supplier I've never done business with before. Email communications were good, but you just never know.

Here's the part I was looking at:



Well, a week or two goes by, and I hadn't received the parts - but I still had not begun to worry. Then, yesterday, while sitting in a pile of papers about 2' high, reading over various construction law contract provisions and their exceptions (No Damages for Delay Clauses, etc), I get an email - there's a package for me in the Registrar's office of the law school.

...What?

So I wander over to that building, and lo-and-behold, there's a box with about 50 stamps on it, from Germany. The address it had been mailed to was my email signature block. Mind you, there's no actual address in my email signature. The closest thing to it is the school name, school of law, and Dallas, TX. More like an identifier as to who is the sender of the email, certainly no mailing address.

Yet our US Postal Service was able to get it to me somehow. The lady at the Registrar's office, with a bit of laughter in her voice says "You know we closed down the student post office some years ago...", to which I respond "Never knew there was one, look at the address!" - and she does, and begins to laugh.

To wrap up this long story, our post office can get you a package of parts from Germany even with the least descriptive address ever, Motorize.de is legitimate, their parts are nice, and somehow I was not clear about where the parts should have been shipped to!



I won't hesitate to recommend them,
eBay store here: http://stores.ebay.com/Ducati-Aprilia-Cagiva-parts
website here: http://motorize.de/

[Christian]

Good story! And cool part! The quick-release seat hinge is definitely something I was thinking of in the back of my mind.

Any new progress on your build?

[junior varsity]

Started looking at how the 'airbox' and frame will be modified for the 2v carb parts. I'm thinking about running an airbox and the ram-air tubes to the front fairing to (a) provide some air to the rear cylinder and (b) provide a place to hide some wires.

Beyond that, nothing really. Picked up a SSS rearstand since I didn't have one.

[Monsterlover]

dude you should have said something. . .

i have a sss rear stand that i would have sold way way way cheap (it has no wheels but can be repaired)