NCY Direct Ignition Initiation! (RH50)

[zerotothirty]

I have installed a fancy new ignition from NCY and as far as I know, it works great!
(I wheeled it outside and started it up and she's idling happier than ever before)

However, I am running into 2 problems.

1) It's too big. The flexible rubber sheath that fits around the spark plug is pretty long, the whole thing is bent into a banana shape currently.

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2) The tachometer wire from the Trail Tech that normally wraps around the ignition coil has nothing to wrap around, so I'm not sure of an alternative. (This might be a deal breaker on its own)

After I spliced the new wires on, I wrapped the RPM sensor wire around the NCY wires and the result was no reading.

[zerotothirty]

Update:

NCY got back to me stating it's possible to connect the tach sensor to the ignition somewhere directly. I didn't want to deal with that since the fitment was too tight for the plug to be readily accessible. I replaced it with NCY's high-tension coil.

I ran a compression test and was only hitting 60 PSI, so I checked all head nut torque, started the motor and checked for vacuum leaks with carb cleaner, couldn't find the culprit. Now, I am looking at replacing the top-end. The original Malossi 40mm piston was baked to a crisp, so I changed it out and must have gotten ~ 700 miles on the second piston.

This is a problem I have had since early on. It happened with 2 70cc kits from Malossi. Fouled head, piston, rings, scored cylinder. Spark plug always reads fine (chocolatey brown). Cylinder head temp sensor normally reads 170 idle and 250ish run temp (on flat).

I am thinking maybe it could be the ignition timing since I only use 93 gas.

Any thoughts?


I upjetted from 90 -> 94 and noticed a significant improvement at idle.

[90GTVert]

You can get an ignition signal for the tach by tapping into the coil positive wire.

It sounds like you should be doing a full tuning process on the carb once you have a healthy engine.
www.49ccscoot.com/faq/carbtune.html

[jackrides]

Two possible compression issues. 1. The throttle must be held open. 2. The gauge must have a valve(looks like an inner tube valve) at the end that goes into the head. Otherwise the hose volume is added to the head volume and the reading will always be low.