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I have a set of boswells and a set of greens. I have to get the pics

Yeah i saw these and no way. hahaha but how awesome do they look.

Maybe you guys can turn the economy around in November

This is a fantastic write-up, and I love seeing the honesty here. So often, people avoid showing the truth to dodge blame, but I really applaud you for telling it like it is. They say the difference between an expert and a beginner is that the beginner hasn’t blown up enough engines...

There is a good thread on here talking about velocity in the manifold runners I suggest you look at it before you make any decision. Here is a link to our high velocity intake manifold...

you use another stock one flipped it bolts right in there

Here you can see the extra lighting coil being fitted. If you can solder you can do this.

That’s awesome, and you basically expressed what we were trying to say in a better way. I did want to build a taper down to increase speed and maintain airflow, and a 7-degree included angle is the commonly recognized standard for that. Making a 44 manifold wasn’t an option for us because...

Introducing the Wax Racing Yamaha Supercharger The Yamaha 62T stator typically produces around 80-100 watts of electrical power, equating to about 7.5 amps charging into your battery. While this is sufficient for powering the ignition system and charging the battery, it’s not designed to handle...

You have to understand that any manifold has to be designed to accommodate the largest size carbs that might be used on it. It's not economically viable to produce a different manifold for every carb size—nobody does that. However, by keeping the intake consistent in area all the way down, you...

Feel free to threadjack, I’m actually enjoying the discussion turning towards dynos. It’s an interesting situation since I don’t know anyone currently dynoing two-stroke ski engines. I have my own thoughts on why it might not work. I remember years ago, Dan Lamey mentioned that his...

Its not lean then

Potentially, I guess you could. I'm not a dyno expert, but I'd love to see what a modern dyno with a skilled operator could achieve. I imagine it would be much easier with a four-stroke engine, but with a two-stroke, those slow ramp rates everyone talks about could definitely lead to detonation...

ET did dyno his engine, although he didn’t post the power figures, he did share the torque. From that, I calculated it was making around 167 hp, if I recall correctly. This was some time ago, but if you're interested, you can find the thread on here with a quick search.

A jet ski engine operates quite differently from other engines because it never really experiences sustained load. The moment you hit the throttle, it quickly flares to max RPM. The challenge with using a dyno for tuning is that it can impose a massive load on the engine with a slow ramp rate...

Absolutely, CFM (cubic feet per minute) is crucial. You need to ensure that your airflow matches what your carburetors can handle—but not exceed it. When you increase the intake size beyond what the carburetor can flow, you lose velocity and port energy, which directly impacts throttle response...

im busy away for the weekend,. I will answer this tomorrow

If you can, try to find one from between 1997 and 2007—they actually make more power than the models from 2008 onwards. It’s a trick we used on Jayden Richardson’s SuperJet when he raced in the Lites class at the World's over the past few years. It definitely gave him an edge!