speed plate help

AlexC651

AlexC651

Location
Reading, PA
Not sure what speed plate this is but it does not have cuts for orings on the bottom. Kinda annoying because I have to use carb gaskets and cut the bolt hole tabs to fit.

Engine is 66E 927. The manifolds are wdk twin. Carbs are full spec 49s.

Wondering if anyone had one already cut for 49s they'd part with? Or if a machinist could cut recesses for orings?
 

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Roseand

Roseand

The Weaponizer
Site Supporter
Location
Wisconsin
If you can't find a speedplate cut for orings: what kind of gasket material are you using? Depending on the material you can grease the gasket and reuse it.
 
AlexC651

AlexC651

Location
Reading, PA
Roseand said:
If you can't find a speedplate cut for orings: what kind of gasket material are you using? Depending on the material you can grease the gasket and reuse it.
Click to expand...
I'm using green gaskets from Troy but the bolt holes domt mach up so I had to cut the tabs and they are a HUGE pain to line up.
 
Pro-pulsion

Pro-pulsion

Location
Ontario, Canada
It looks like an oem Yamaha SBN44 carb plate to me. They don't use o-rings, only gaskets. As far as I know it's not meant to be a true speedplate as much as it's just meant to keep the carbs together when removing unlike the dual 38's on a stock SuperJet. I suppose it would give the intake tract a little more length but as far as I have experienced, it's mainly for easier management of the carbs during removal, installation and keeping the throttle linkage aligned.

Used - Dual 44’s Yamaha 760

Dual 44mm carbs from reeds to flame arrestor. Could use new fuel pump rubber gaskets. One carb had some bubbles during a popoff test. Stock jetting from a 760 Yamaha ski. $250 shipped
www.x-h2o.com
 
WFO Speedracer

WFO Speedracer

A lifetime ban is like a lifetime warranty !
Location
Alabama
Yep I did that mod on a few 760'S , pull the studs out and replaced then with Allen head screws then you could remove them with a ball head Allen socket .
 
AlexC651

AlexC651

Location
Reading, PA
I see that it is just a carb plate. I can't seem to find anyone with a 66e using an actual speed plate. Wonder if I can use the gp800 plate to manifold gasket and use a 49mm hole punch and make my life a little easier? Worth a shot!
 
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