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Make sure to set the carbs richer as the air temps dip. Higher combustion temps cause more problems than a little cooler water.

It’s not me, I think it looks great. I’ve noticed highly customized stuff seems to have a more narrow appeal compared to generic stuff. That’s all. Lots of people would rather eat at McDonalds, for some strange reason.

When you customize something it tends to be yours forever.

The gen 2 650 pipes used a 5" center coupler. They were clearly made for the typically over propped 650s of the day. They are good pipes. A stock 650 cylinder with 178 degree exhaust will pull to 6600 RPM with good response and top 43mph. I installed a full length one on my 750 X2. At 190...

You want to schedule overhauls right before something breaks that destroys the whole engine. That can be difficult to figure. Completely stock engines usually last a long time. Corrosion, dirty carbs, or an oiling failure is the killer. Everything performance enthusiast do to their engines...

Charging voltage will always be greater than battery voltage or else the battery wont charge. The Zeel could be operating from the elevated charge voltage which will quickly change with small load changes. I dont know how robust the Zeel electronics are but it would need a sizeable filter to...

Did you confirm the timing?

Our pumps act as water brakes, the key is matching the load to the pipes narrow power curve. One thing that I learned was that our pumps are okay with flow but dont like to make pressure. Larger nozzles will make more thrust without any increase in power. Smaller nozzles typically perform...

I always gave the ignition its own battery. The new lithium ion cells make it safe and easy. Not a problem at all for "total loss" users but probably too difficult for everyone else.

Take a good look, you may have to fill it with water to be sure. If there is a hole it would have likely been drilled through a fitting hole..

That would depend on how much the timing was changed and more importantly the pump load. If the engine is loaded lightly then less high rpm timing wont hurt as much. If the pump was optimized for a high octane tune it would act overloaded when compression/timing is lowered. If it hits the pipe...

His compression is too high for a stock cdi or an enhancer. The carb tune needs to be rich and the ignition timing needs to pull back or else he will trash his engine, just like most other riders do.

The enhancer doesn’t have much retard curve. The zeel will allow you to use cheaper fuel.

Kawasaki standups have a little tuning in their stock exhaust where Yamaha standups did not. A mild pipe can be tuned somewhat lean at part throttle and improve BSFC over an open exhaust.

The 650sx had the longest legs of two stroke stand ups.

Yamaha kept their old cdi through the entire production or 650-701s These will retard a little for starting and idle only. The 760 cdi was computerized but I never checked its timing. The gp800 used Kawasaki 750-800 style stators and cdi boxes which can be programed for various timing curves...

Flatten the impeller until it responds quick enough.

Ever see the Red Green show?

No customer ever asked how long it will last with the port so wide. Since you are a thinking man, cut the port under 70% wide and raise it a little. This will make the same power with much longer piston/ring life. Throttle response may be a little slower.

Krash is a production hull. I dont know about their quality or parts availability. All hulls are easy to damage so look for cracks and never buy a repainted hull.