MX FCR Project (Monster 750).

[koko64]

 
Cheers

[koko64]

Did some more work today. Careful measuring of each carb's potential position on each manifold ensued. I had to factor in the lower frame struts and the fat MX carb's giant float bowl touching one if I used it on the rear cyl horizontal manifold. That carb's position will be lower. I also considered the position of the throttle cables, choke knobs, float bowl vents, idle speed knobs, fuel lines, main jet access cap, oil cooler lines, air filters and the drain hoses. The carb heating kit will be removed and replaced with the oem oil cooler lines.

The 45 deg boot gives 20mm rise so I'll run the fat MX carb off the 45 deg boot on the front cyl manifold and put the relatively svelte slant body carb on the vert cylinder's manifold. The carbs will both face forward and be beside each other, but sit split level with the front cyl carb both higher and projected forward about 40mm. Looking at the air filters I have some more compact cone shaped K&N filters which I may have to use.
You could sink quite a few beers sitting there looking and visualising where it should all go.

Im doing this to be able to a straight carb swap.

[koko64]

20200217_191616 by Tony Kokonis, on Flickr
20200217_191539 by Tony Kokonis, on Flickr
20200217_191305 by Tony Kokonis, on Flickr

[koko64]

The pics of the carbs above in nearly completed form. The idle speed knobs are positioned for easy access facing out each side of the bike. I repositioned the idle speed knob of the slant carb.  Note the different manifold boots for horizontal operation. I fitted a different float bowl to the slant carb, but it has no drain outlet, so the vent breathers were given hoses to serve as overflow ports.

[koko64]

20200217_191459 by Tony Kokonis, on Flickr

Short vent hoses on the MX carb. It has an overflow from the base of the float bowl. One carb opens the slide clockwise and the other anti clockwise. The give away is the orientation of the carb top cap.
I will try using only the pull cable for simplicity (I always do with these carbs), but I never do that for customers for liability reasons (do so at your own risk).

[koko64]

20200220_180042 by Tony Kokonis, on Flickr

Anyone recognize these K&N filters? They're some old ones I have cleaned up. They are 20-30mm shorter than the barrel filters (K&N RU-0800's) I have on the oem carbs. I ported one of the air filter adaptors and may use the ones that came with the carbs as they are 20-30mm shorter than the velocity stack adaptors I have ordered from Powerbarn. I really want to use the 50mm stacks and larger RU-0800 pods, but it's gonna be tight.
I'll know for sure what combination of parts to use when I go for the first fitting.

[koko64]

20200220_180026 by Tony Kokonis, on Flickr

You can see the different orientation of the throttle cams from the T top caps.

[koko64]

Had to port this one for obvious reasons. (Ebay pic of actual carb before cleaning and porting).
Before.

s-l1600 (5) by Tony Kokonis, on Flickr

After.

20200220_184133 by Tony Kokonis, on Flickr



This one was fine.

s-l300 (1) by Tony Kokonis, on Flickr

[koko64]

20200220_184043 by Tony Kokonis, on Flickr
20200220_183948 by Tony Kokonis, on Flickr

DO35B4  and F024E4.

[koko64]

I think they are RU-2780.
Edit: Yes I can confirm they are. The appropriate outer covers have been ordered (RU2780DK).
So we'll see what combo of V-stack and filter fits best.

[Von Eisen]

 
 

[koko64]

20200227_124711 by Tony Kokonis, on Flickr

With bags. This option is actually 27mm shorter than the
RU-0800's with 50mm stacks. Good to have options if things don't quite fit as expected.

G'day VE, how's it going?

VE has been working on a similar project and we have had discussions via pm. I invited VE to come aboard and share his findings. It has been great comparing notes.

[Von Eisen]

  Looking good koko   ... So you have decided not to use the PB-853000  ? Ive ordered a couple, from the same source, in the hope I can squeeze them in. The short bend manifold adapter I ordered http://www.nichecycle.com/ncs/categories/carburetor/flanges-adapters/carb-holder-elbow.html arrived yesterday, its quiet pliable and both ends will shoe horn onto the 46mm spigot no worries.  Im just waiting on the one into two cable and the PB-853000 before I move onto the fun part ... Great thread btw

[koko64]

Cheers VE. 
I forgot what part that is (PB853000)

[Von Eisen]

 
 Edited that number thinking Id got it wrong , then had to change it back to what I originally wrote  PB-853000 K&N Velocity Stack Air Filter Adapter