Quote from: desmo916sp on July 17, 2011, 07:09:28 AM
Pepe ...  What year 900 motor did you use that did not line up with the 748 frame ... or was your 748 frame a 2000 and newer ..
I am looking at using 1998 944, balanced / blue printed, v1 v2 heads, ported, larger intake and exhaust valves, ST2 cams, 41mm flatslides, and a STM slipper clutch .. 92HP dynoed at the rearwheel .. 1996-1998 ..916/748 frame and swingarm..

Are you using short or stock, long manifolds?

I have the Long manifolds on the 41mmFS carbs / open air box K/N filter ..

OK i know i am by no means a prolevel rider (unless you mean in my own imagination) .. but if you adjust the swingarm / frame swingarm axle bolt holder pieces (i think that is the technical  name for it) up that 1/2 inch .. won't that put all the Shock length / ride height rod length / suspension rocker off .. effecting rake and trail.. 

Pepe ... do you have a good side view pic of your bike right now .. with the monster tank on it and how much room you have under it for the wiring and such ..??

Quote from: desmo916sp on July 17, 2011, 10:43:29 PM
I have the Long manifolds on the 41mmFS carbs / open air box K/N filter ..

OK i know i am by no means a prolevel rider (unless you mean in my own imagination) .. but if you adjust the swingarm / frame swingarm axle bolt holder pieces (i think that is the technical  name for it) up that 1/2 inch .. won't that put all the Shock length / ride height rod length / suspension rocker off .. effecting rake and trail.. 

No - these bikes have adjustable ride rods - you dial it back to correct for changes in rear axle length, etc.

But yes, it is a geometry change, so does this geometry change affect the way the bike handles?

Yes, but.    If you search on oval swingarm pivots, you'll find posts where the 999RS/WSBK actually used higher drilled locating keys for the swingarm pivot in order to gain traction and had the cases made where the swingarm pivot hole was elongated to allow for such adjustments.

J V ... I get the whole ride hieght adjustability thing and yes i even understand about the rear axle goes up and down with rotation when you adjust the chain ( I owned a 916 for 6 years ) so i guess 1/2 inch up in the middle ( over entire wheelbase ) i guess it isn't that big in the end.. also ... any chance of using a s2r swingarm on a 916 frame .. i see the shock point is differant and th eride height rods too .. so will it work ?? with out having a unubtainium rocker built..?

That I do not know - you would have to modify the frame (cut off the swingarm pivot portion)...  Frame has to be modified anyhow to allow for offset placement of 2v Throttle Bodies / Carburetors, so that may not be such a big deal for you.

Quote from: j v on July 18, 2011, 04:33:30 AM
No - these bikes have adjustable ride rods - you dial it back to correct for changes in rear axle length, etc.

+1 on that. You compensate for the different height by adjusting the rear shock rod.

The wiring loom will fit without a problem, the main thing for me is to figure out where to put the battery and the coils. I have a Shorai battery, which is about half the volume of the stock one, so it'll be easier to place. I have pod filters (K&N RU-1750) instead of an airbox, so I should be able to use the space under the tank.

Quote from: desmo916sp on July 18, 2011, 05:27:23 AM
J V ... I get the whole ride hieght adjustability thing and yes i even understand about the rear axle goes up and down with rotation when you adjust the chain ( I owned a 916 for 6 years ) so i guess 1/2 inch up in the middle ( over entire wheelbase ) i guess it isn't that big in the end.. also ... any chance of using a s2r swingarm on a 916 frame .. i see the shock point is differant and th eride height rods too .. so will it work ?? with out having a unubtainium rocker built..?

It's more like 1/4 of an inch over the whole lenght, but anyway yes it's not a big deal.

As for the swingarms, it will not work unless you cut off the lower part of the SBK frame (the same part I had moved up to fit the holes), the S2r swingarm is wider (to fit the wider 2V engine cases). I don't know if a special rocker would work, I think you would have to move the rocker hinge from the right side (Monsters) to the left side (SBK). In my opinion, if you're using a SBK frame, you should use a SBK swingarm as well.

oh I cant wait to see this done.  The hard efforts and delays are going to be well worth it.  Patience will get you thru.

Few bits and pieces came through the mail today: spacers for the speedo drive, 46 & 41 mm socket tool, bar end mirrors and spacers for the top triple.


Still I needed to machine the spacer so it would fit correctly: 2mm from the center and from the top. Well ..... very approximately 2mm 


And the triples now fit nicely! Forks and wheel will go on next.


In the meanwhile I need to figure out what filters to use. The K&N RU-1750 that worked with the monster don't fit due to the shape of the gas tank and the front pivot. I've cut down the flange as much as possible but it's still a no-go.


The tank should almost lay on the frame, but the pod filters lift it by a couple centimeters. I still have not decided if I want to make a bracket for the front tank hinge or if I'll just cut up a stock airbox to fit my needs.

looks like you are running long intake runners? would shorter ones give you the clearance you need?

I have the stock M900 (M750, M600, SS.....) intake runners. Shorter ones would help fit the pod filters but a pair of these RU-2780 work as well.

Quote from: Raux on July 20, 2011, 10:03:58 PM
looks like you are running long intake runners? would shorter ones give you the clearance you need?

By intake runners, are you describing the intake manifolds?  Short ones would require split-singles.  It would be bad ass, but those carbs are quite expensive. (Says the guy wishing he had money in his piggy bank for some)

PS.  Your IMA Special Parts triples look delicious.   But question - what was the need for the spacer?

Quote from: j v on July 21, 2011, 07:13:11 AM
By intake runners, are you describing the intake manifolds?  Short ones would require split-singles.  It would be bad ass, but those carbs are quite expensive. (Says the guy wishing he had money in his piggy bank for some)

It's not just the cost of buying them, but also the added hassle of maintaining split carbs (synch & split cables) for a few more HP at the top. Not worth it for me since this will be more of a daily rider than a track only beast.

Quote from: j v on July 21, 2011, 07:14:11 AM
PS.  Your IMA Special Parts triples look delicious.   But question - what was the need for the spacer?

The rod is too tall, so with the head nuts tightened down there were still a couple millimeters of space.

In this photo, the spacer is under the bottom nut (the pair under the top triple). The spacer pushes down on the seal over the top steering head bearing. I also got rid of the elliptic spacers steering stops on the bottom triple since they didn't fit well and the bolts by themselves work just fine and give me all the steering I can want. For what it's worth I have no issue whatsoever with IMA and their work, I didn't even bother to contact them over this because I figured it would just be a small fix.

Ah.  The longer stem is likely the non-adjustable steering head superbike model - I believe they are longer than the eccentric-adjustable one.   Somebody with more knowledge could verify that.

I currently have a set of 30mm DucShop triples on my 748 project - they are 848 triples (both fixed steering head models - mine being what I would call a 748"E" frame, rather than an S or R).  They have the same type eccentric adjustable steering stops.   Its a bit finicky to dial in, and I've come to learn some of the superbike guys that are track only don't use them at all - steering stops - and if they are not 'unboltable' as in the DucShop and IMA designs, they either grind them off of the frame or off of the lower triple