Quick dual44 tuning question

[beachedflunkey]

Can anyone recommend a good popoff setting for silver dual 44's on a magoo ported 701 w/bpipe and stock arrestors? My harddrive crashed and apparently my last backup did not have those notes saved...

 

[Matt_E]

24psi

 

[Mark44]

I am running 120 P 105 M 80 gram spring with 15 pop 2.3 N/S on the same set up. Make sure you fill your cross over it was night and day.

Mark44

 

[beachedflunkey]

Thanks. I forget which jets are in there but I know they match what Paul had suggested once upon a time.

 

[Mark44]

Do not run stuffers either.

Mark44

 

[beachedflunkey]

Mark, are you running the same setup as me? I was told to run stuffers and was given all the tuning advice I needed but just never ordered my new n/s's and springs. I'm on an r&d manifold w/o crossovers, fwiw...

 

[Mark44]

Magoo ported 701 duel 44’s limited b pipe. I screwed with carb tuning for months and to find out after I pulled the stuffers it was tuned in two rides Wax found the problem. There was a great thread called duel 44 observations if you want to read all about it. I also had a jetting suggestion but it varied a lot.

Mark44

 

[sjetrider]

I am running a Riva Mnfld w/ 44's on a ported 760 w/ 2.3 n/s & 80g spring (17 p/o) , 110p & 120 main & its lean in cool water but good in med to warm water. Not sure if this helps but there U go for what its worth anyway.
Just need another set of Full Specs.. Once you run them its hard to be happy with anything else:baby:

 

[Matt_E]

I tested popoffs from 15psi to 32 psi and found my happy spot at 24.

 

[Mark44]

i

I tested popoffs from 15psi to 32 psi and found my happy spot at 24.

Did the same thing Matt ever spring and N/S combo pop and this worked best for my set up, hits like a mofo.

Mark44

 

[beachedflunkey]

Thanks again guys. Mark, yes I've seen that long "observations" thread. I was just hoping for some quick advice so I can order what I need and play with it next time I'm down at the house :fing02:

 

[Matt_E]

^^ And that really is the key.
Jetting suggestions from other folks are good starting points, but to find the best for your setup, you really need to spend some time and try different things.


Disclaimer: Unless you run Full Spectrums. In that case, just run whatever Ed tells ya to run. :haha:

 

[SUPERJET-113]

Heres my LPW engine specs and below that is what Paul told me to run on mine and it was spot on.

Engine/ignition:
LPW freestyle ported 61X cyl. @ 81.50 Pro-X pistons
LPW freestyle/freeride epoxied/ported 62T cases
ADA blue girdled head w/33cc domes
Factory B 701 pipe with LPW headpipe/manifold boring/matching & dual cooling fitting
Moto Tassinari V-force II reeds/cages
MSD complete Total loss dual channel digital ignition w
Mikuni dual OEM 760 44mm carbs with OEM manifold
R&D billet angled reed spacer plate
Jetworks flow control valve

OEM 760 dual 44 carb specs:
Mains 110
Pilots 117.5
2.0 needle and seat
95 gr spring

24-26 pop off(I'm at 26 now)

 

[crammit442]

Can anyone recommend a good popoff setting for oem dual 44's on a magoo ported 701 w/bpipe and stock arrestors? My harddrive crashed and apparently my last backup did not have those notes saved...

Why don't you just ask him?:dunno:

 

[Big Kahuna]

Why don't you just ask him?:dunno:

Best Advice I have read yet..........

 

[beachedflunkey]

Been there tried that a couple times. Apparently he is still recovering from WF. Just lookin' for a little quick help...

 

[SUPERTUNE]

Oem 44's Suck! Just get some aftermarket 46'mm's mikuni's, leave them stock for now with just a jetting job and you can always upgrade them later if you keep them in good shape. Oem carbs don't have the internal fuel delivery passages needed for flow that the aftermarkets have and have the wrong cutaway throttle valve! Oem's were made for the STOCK 760 in a GP yamaha runabout or Blaster II and not for a superjet engine. Keep in mind that Yamaha needed fuel economy with their dual 44's, we need power!

 

[RoyalFlush@PCB]

Oem 44's Suck!

:fing02:

I jumped on the OEM 44 bandwagon a couple of years ago and could never get 'em dialed in.

Zero problems with Chuckie-prepped 46's or LPW-prepped Full Specs.

 

[SUPERJET-113]

They dont suck.. Maybe compared to full spectrums or Team scream prepped 46's or whatever, but they dont suck that bad especially for what you can pick them up for.

If your on a budget they are fine. Mine were simple to tune and was done dialing them in in about a 1/2 hour.

 

[waxhead]

i have had good results with oem 44s

but now i just put on 48 novis
better response , still get great econmy and the torque is awesome