Dual 44 Mikuni observations

[Matt_E]

Shaking the needle off the seat was a major downside to running low popoff on my setup. I even increased my previous 25psi to 32psi.

Runs nice & crisp that way.

 

[robertg]

have a look at your pivot arm make sure its not worn or lose on the pin
this sometimes does this as well when it shakes

make sure its poping off clean as well

It pops off clean and everything is new. It loads up when tilted on the right side and runs lean when tilted on the left.

 

[waxhead]

what way are your pumps facing in or out

 

[robertg]

They face out, it's an OEM 760 manifold.

 

[waxhead]

so when the jets are up it runs rich correct ??

when you are over on the side fuel is running out your jets
this is caused but a possiblity of a few things

leaking n/s
hole in diaphram
leaking anti siphon valve on metering block

 

[Mark44]

Rocks!!!!!

UPDATE.
Wax the ski rips! I removed the stuffers and it increased the bottom end a lot, very noticeable.:Banane01: Actually I have to get use to the response of the throttle now. It hit so darn hard yesterday while I was doing bull dogs and riding out of them I launch the ski out from under me. :biggrin: :biggrin:

Thanks for all your help with the engine over the summer you really got this monster dialed in even from the other side of the plant! I may increase the low speed jet just to make sure I have it high enough but other than that I feel it is complete.:biggthumpup:

Thanks again Wax a big Brap! To you
Mark44
:cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer:

 

[waxhead]

Your welcome
i am glad its all tuned in and going hard
Nothing like riding a well tuned ski

 

[waxhead]

Its also amazing just how much the stuffers kill the 62t series engines

Every time i remove a set for a customer they shocked as to the results

 

[Mark44]

w

Yes very shocking the throttle response is now remarkable with the stuffers removed. :bigeyes: :bigeyes: :bigeyes:

Katie was on mine and I was on hers and she wouldn't give it back. I will have to hide the keys now.:biggthumpup:

Thanks again.
Mark44 BRAPPING AGAIN!
:cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer:

 

[Katie]

Yes very shocking the throttle response is now remarkable with the stuffers removed. :bigeyes: :bigeyes: :bigeyes:

Katie was on mine and I was on hers and she wouldn't give it back. I will have to hide the keys now.:biggthumpup:

Thanks again.
Mark44 BRAPPING AGAIN!
:cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer: :cheer:

Nope just looks like I will be sending that spare you have in the garage out for some porting and replace it with the motor in my ski. I can't even ride my ski after riding yours-its like driving a mercades than having to get back in a yugo.

Katie

 

[Mark44]

g

Nope just looks like I will be sending that spare you have in the garage out for some porting and replace it with the motor in my ski. I can't even ride my ski after riding yours-its like driving a mercades than having to get back in a yugo.

Katie

:haha: :haha: :haha: :haha: :haha: :haha: :haha: Time to start your motor project! Katie needs Brap! :Banane01: :Banane01:

Mark44 Brap!

 

[SuperJETT]

Alright, I'm pretty happy with mine now, but think there is more left in them.

Lehr Performance 760, ADA head with pump gas domes
B mod
oem 44's
Riva spacer plate
oem reed cages with Boyesen pro dual stage
MSD enhancer
mild case porting

My current jetting is 2.5/80, 115L/100H, low screws around 7/8, high screws around 1/2.

I'm wondering if I need to pull the spacer plate out.

 

[crammit442]

Alright, I'm pretty happy with mine now, but think there is more left in them.

Lehr Performance 760, ADA head with pump gas domes
B mod
oem 44's
Riva spacer plate
oem reed cages with Boyesen pro dual stage
MSD enhancer
mild case porting

My current jetting is 2.5/80, 115L/100H, low screws around 7/8, high screws around 1/2.

I'm wondering if I need to pull the spacer plate out.

That sure sounds like VERY low popoff. I would think you'd have muddy response. I don't know what those normally run, but I ran 2.0/95 w/blackjack 44's. Have you tried higher popoff?

Charles

 

[SuperJETT]

That sure sounds like VERY low popoff. I would think you'd have muddy response. I don't know what those normally run, but I ran 2.0/95 w/blackjack 44's. Have you tried higher popoff?

Charles

You haven't followed this thread have you?

Perfectly clean, oem 44's run quite a bit different.

 

[Matt_E]

FWIW, I run 44's - and they definetely like higher popoff better than lower popoff.

IN MY APPLICATION

 

[Mark44]

FYI
Mine are new 44's and I run 15 on the pop with 2.3 ns and 80 gram.

Mine are also regular 44's not OEM.

Mark44

 

[SuperJETT]

FWIW, I run 44's - and they definetely like higher popoff better than lower popoff.

IN MY APPLICATION

oem 44's or regular Mikuni 44's?

 

[Matt_E]

See....that, I still need to figure out. I forget who I bought them from.

 

[SuperJETT]

An easy way to tell if they are oem, one fuel pump will have the pulse fitting in the center of the cover and point straight down ane the fuel fittings will be long swooping elbows instead of hard 90's.

 

[SuperJETT]

These are oem's.