That design will pull down whenever they touch smooth water, you wont notice it nearly as much in rough water though. Mounting them a little higher will keep them dry when doing speed runs on glass. They will still work the same when you lean and turn.
If you have an air leak or protrusion like grate bolts, it will vibrate wihile underway at mid to high power. A large hub that is too flat tends to struggle when the ski is first dropped in and not moving forward..
CNC porting with the sleeves installed requires expensive equipment. Removing/reinstalling sleeves is too time consuming. It is much easier to use hand tools and pay yourself $100/hr. It not like the customer knows what he wants or what he is getting anyway.
Nearly all resins/adhesives contain volatiles that create porosity, this lowers compression and bending strength. Leaving vacuum on the part makes it a lot worse in some cases. It is better to cure with positive pressure with the bag vented, even if you can get only 10PSI. No need to worry too...
Good luck finding measurements or tech info on anything ski related. MFGs dont provide any and customers simply dont ask. You end up with internet forums full of customers that are either happy or unhappy with their purchase for whatever reason.
I meant the amount of throttle opening required for the pipe to find resonance rpm. All else equal, a small carb will be opened more than a larger one at this reference point or any rpm below full power.
I did a test between single 44 and twin 44s on the same engine. The single required 50% throttle to hit the pipe. Twins hit around 40% open. The twins needed to be set richer at part throttle for best response and consumed 15-20% more fuel for surf type riding. The twins made the pipe hit a...
If both carbs are identical the difference between cyls should be slight. Normally one plug will be cleaner than the other. It was common for Seadoo 580-720 and Yamaha 701+ to have a hotter rear cylinder. I tuned two Kawasaki 750s that both had hot front cylinders. Factory 760s had a larger main...
The performance gain is in traction only, they keep working when a stock pump looses thrust. A large hub impeller in a stock pump is about 40% improvement in hookup. The Solas stator makes it complete.
Look for missing bearing retainer. It could be detonation it is usually more of a frosted appearance. Also bores this large tend to stick rings before piston tops look that bad.
The main jet hole is huge compared to any jet. I ended up with a 160 and 2 turns out on a stock 44/61X case under a high port 701. You may very well be choking a little at the needle or even at the basket. A 2.0 N/S has more area than all downstream orifices so I always use this size or larger...
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