CarbonCorban's HPE powered RIP Build

CarbonCorban

AKA El Jefe
Location
Albuquerque, NM
Yes. As far as I know, Watcon does make any, and sells the JetWorks ones for 04-up SJ carbs. The HS adjuster has same thread pattern and profile but low speed is different.

image.jpeg

Threads are a perfect match but the point looks longer and different taper. They do thread in perfectly though and "seem" like they would work.

Are these the same ones you're used to seeing?
 

RMBC Freeride

Vintage
Site Supporter
Location
Pueblo, CO
Those won't work... the taper is different and the stepped shoulder is different. Pretty sure that's exactly what @JetManiac was talking about. You're metering a very tiny passageway with that needle, if the tapers don't match it will either flood it with fuel or worse, not let enough through.

(EDIT) And possibly ruin the seat if you turn the wrong needle in too tightly.
 

JetManiac

Stoked
Site Supporter
Vendor Account
Location
orlando
View attachment 302560

Threads are a perfect match but the point looks longer and different taper. They do thread in perfectly though and "seem" like they would work.

Are these the same ones you're used to seeing?

Yes, those are the same ones we stock, made by JetWorks. They are for 04-up SJ's with dual 38s and the length and shape of all the front profiles are different so we have never used them in oem dual 44 application.
 

CarbonCorban

AKA El Jefe
Location
Albuquerque, NM
Well, thanks guys for the heads up. I appreciate that, I am sure I would have been fighting with them without knowing that. Much appreciated.

@hornedogg79 -- Can you link me to these extreme throttle adjusters? I definitely need something for adjusting.
 

CarbonCorban

AKA El Jefe
Location
Albuquerque, NM
As it states on our site, these are for 04-up SJ. 38mm carbs. These will NOT work in your stock 44mm OE carbs.

John, I never saw that warning on your website and I just checked, still don't see it. Navigated to Watcon.com > Fuel System > Carb Adjusters > LOW speed with tbar

Description on your site:
These are needed when you are moding your SJ, as the original screws are behind a brass plug, and cannot be accesed for adjusting with the carbs on.

Added to cart and purchased. Never saw anything about 38mm only.

I just did it again to be sure, and here is the link:
https://www.watcon.com/fuel-system/...screw-yamaha-sj-04-later-low-speed-with-t-bar

EDIT: received an email from John, I was not aware that 38mm carbs were the only option on 04-up Superjets so while the site doesn't say 38mm only, it does say 04-up so my mistake.

It is not a big deal as the group here caught it for me before I was struggling with it later.

Guess I will have a set of tbars to sell that are installed but never used....lol.
 
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CarbonCorban

AKA El Jefe
Location
Albuquerque, NM
Intake_1.jpg

The Epoxy that was in my intake didn't survive the powdercoating heat, so had to redo. I came up with using some foam in the runner, then filled it up, let it cure, and then sanded it flat. I had to burn off a little of the left over foam, and then scrape it all clean, but came out pretty cherry I think.

Motor_2.JPG

Spent about 30 mins putting on the exhaust manifold, starter, bendix, stator, and flywheel this weekend. Looks pretty good with my powder coated parts and the Jetmaniac stainless hardware kit to match all the hardware Holeshot put on the motor. I am digging the black and blue contrast. Please excuse the mess.
 

CarbonCorban

AKA El Jefe
Location
Albuquerque, NM
Testing pop-off tonight, and it appears my needle and seats are leaking, and only popped at 18psi. So going to order a rebuild kit for each, and do a complete rebuild.

These were supposed to be on a fresh rebuild, but I guess I better be safe.
 

Roseand

The Weaponizer
Site Supporter
Location
Wisconsin
Testing pop-off tonight, and it appears my needle and seats are leaking, and only popped at 18psi. So going to order a rebuild kit for each, and do a complete rebuild.

These were supposed to be on a fresh rebuild, but I guess I better be safe.
What were they supposed to pop off at?
And did you soak the needles in wd40 or similar before checking pop off?

Sent from my SM-G920V using Tapatalk
 
Your project is looking good.
The extreme adjusters are definatly worth checking out, I am very happy with mine.

What is the deal with epoxy on the intake manifold? I tried researching it but couldn't find anything
 
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