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This past season I've been running a 771cc 85mm bore with aftermarket 44sbn's, bpipe, and zeel. Most of the year was 180psi, and a couple gallons at 200psi. I've been extremely pleased with the power output and have it tuned perfectly. No fouled plugs, no hesitation, no chugging. I'll be in...

Acquired a yamaha 5mm stroker crank and would like to put a matching 5mm topend on it if one was available. Links to new topends would also be appreciated.

Have you compared your porting for this cylinder to a jm big bore? I know the powervalves are a game changer for the smaller bores but I'm curious what I could expect doing a direct swap from my 200psi, dual 44, zeel, bpipe jm771.

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Turns out running on 1 1/2 cylinders would cause any carb to bog/hesitate. Engine issues are solved so I just purchased some replacement throttle valves. The ones in it are very worn on the edges and also has a hole drilled into it. I will try them out with everything plugged, so they should...

In my infinite stupidity I purchased "modded" sbn 46's and was able to track down what they are. Boswell energy systems. From what I can tell from my research they have a third "midrange" jet that has a hole straight into the bore that feeds from the highspeed circuit under the kidney valve...

Did some more sleuthing online and found one for $206 shipped. https://marinepartsexpress-com.3dcartstores.com/EW2-67711-00-00 Will have to wait and see if its actually in stock or not.

$230 plus shipping for new, I'm aware.

Looking for a superjet fuel tank, preferably one that isn't yellowed. Cold Fusion tank would be a bonus.

Color preference? I could print one and ship for $35.

I have a similar setup, but a jm718 with 33cc domes. The increased timing down low smoothed out the big rush of power when it would come on the pipe. It makes it more predictable having a linear torque curve. If you look at the timing curves, its more or less halfway to a wax curve on a...

Moved on to oem 44s, so made a similar bell insert for those as well. Not planning on going back to 38's on my new-to-me 771 so I might find someone who can use them.

I wanted to make a shorter surf hull, but may have gone too far. Will eventually turn into a diy "hydro trailer"

@G-Body You are correct, it started with jetmaniac and I bought it from the guy in Iowa. I believe I'm the 4th owner. I tried digging up info on these earlier hulls after reading how great the later badass hulls were. I couldn't find anything definitive and figured it had some "badass" blood...

This is a 2009 full carbon I picked up last year. Rocker, original length.

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Good call on a screen. A sliver of epoxy holding my scupper open made my bilge pump work overtime when idling through no wake. The best scupper is one that doesn't leak.

I've got more time and tools than money, so I end up spending much of my time in the shop doing silly things like this. Machined out of aluminum and everything bore matched.

I liked the idea of trying the low profile version, less of velocity stack and more of a rounded lip at the base of the carb inlet. I'd be able to machine this type out of aluminum easily with little waste. Total height is .365" and fits under the oem flame arrestor screen. This should...

It will be many months before I can water test this, but the wheels are in motion. Stock 62t airbox/flame arrestor base is milled flat and a 3d printed velocity stack using the original mounting holes. I turned some stainless bushings as to not crush the plastic when tightening the bolts...