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First off, Speaking for myself, when I am rejetting a carburetor, I like to shoot for 3/4's of a turn out on the high speed, and pilot screws. I am not saying the screw adjustments needs to be anything specific to "run right." For example you could rejet a carb and end up with screw settings of...

Sorry I don't have dimensions handy. I have the bottom half of the PJS X2 ignition box and a whole type 2 ignition box, but they are too small, and the X2 box will not fit with the surf brace. The flywheel was a prototype or production (I am not sure). There was problems with the 750 pick up...

I am good with that. Sorry for the post. Bill M.

I figure it will take about a month or so to finish. I am planning on making it look like a PJS ignition box, but larger (twin coils + accessories) We need it finished before the 2019 WF's. But before I get the box started, I need to fabricate a reluctor to fit my PJS 750 flywheel and a stator...

Just received our Zeeltronic CDI for the mod 750 X2. Took about 4 business days to ship the order, and 4 days for TNT (FedEx) to deliver it. Now we are going to make a custom enclosure for it. Bill M.

When the solenoid clicks, you just confirmed the solenoid and the start switch are working. But it is possible the 12v high amperage switch may not be working. A continuity test would be helpful. I suppose it is possible this one is bad, but it could have been a bad connection...

This is a subject that I know little to nothing about? Why will a larger pump move more water when they require smaller pitch impellers. I do know that when the pump is inefficient, it is possible to increase acceleration, and that oem pumps don't always fill evenly. But no mater what size the...

Did your solenoids make a clicking sound when you replaced them?? But how did so much water get in the water get inside the E-Box??? How often are you filling the engine compartment with water. +1 Even oem Yamaha starter solenoids are low quality. They are only a little bit better than...

I never recommend installing a fuel primer! Because if you did, you might fix the symptom (hard starting) but the mechanical problem will still exists. Your problem occurred after sitting, did you or a mechanic rebuild your carb last year (2018, or 2017)? If so, the float diaphragm may be...

I am more pessimistic than JC. The real test is, will it start after sitting for a week? My bet is that it will need a prime or paper clip to start again. You just filled the float bowl with the paper clip, that is why it restarted 10 minutes later. In order to diagnose a hard starting...

Thanks Wax, I will order that one. Bill M.

To begin with, pop-off only measures the springs preload, and the spring rate controls the transition from the low circuit to the high speed circuit. So IMO replacing a spring instead of the low jet is a mistake. Another thing many people don't realize is the CDK II, sbn, and sbn-i low speed...

+1 A vacuum leak will also cause the needle and seat to not open. It is a common problem on Keihin carbs. If the carb is still mounted, the "paper clip test" can be used to diagnose the problem. Bill M.

In the United States the good PET tachometer costs over $300, and the PET tachometer that SeaDoo, Polaris used in their "factory tools" (looks like a pocket calculator) costs ~$135. Most people spend about $30 for a POS tiny tach. IMO There is a need for a better tachometer than a tiny tach...

It would be dumb to leave an unused wire (any wire) exposed on a motorcycle, car, or a watercraft. MSD provides a tachometer output, and the MSD is too large to fit inside an electrical box (like the PDCIS-02T will). The MSD tach wire provides a short 12v PWM signal, so it is basically a hot...

The idle drop test is how I have been tuning a carburetors low speed and pilot circuits since the early 1980's. The only thing that has changed is the the adjustment after the engine dies or wants to die. On early Mikuni BN carbs the adjustment is 1/4 turn. But when the CDK II was released in...

Quinc, Is your return lines modified to run a #60 to #100 jet? Bill M.

Sorry this never goes over well, but judging engine tuning by plug color is old fashion, totally obsolete, and a waste of time. If you live in California, that has been a reality for a very long time. These days (on 2-strokes) plug color is determined by running time, your brand of pre-mix oil...