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Discussion Starter #1 (Edited)
I've had it with the Yamaha stock CDI's. Bought a brand new one from my local Yamaha dealer 3 years ago and now after 30 000 miles it's already busted.

Anything over 4000 rpm and the bike stutters, I replaced the coil and spark plug cap and everything still the same so I'm sure it is the CDI

I'm trying to order a custom built one from Tom Bauer( Click Here) but it's gonna take about 2 weeks to arrive in South Africa with the shipping problems we have because of the lockdown.

So in the meantime I decided to experiment with something different, I bought a Chinese made CDI that is suppose to work with the TW for only R200(US $10)!

I'm gonna have to be careful with the wiring but luckily there is a good YouTube video that shows precisely how to connect everything up. Click on the title below to have a look


This thing is about half the size of the TW CDI and less than half the weight!

Wednesday is my day off and then I want to try to connect it onto my bike.

This CDI is easy to get on ebay and Aliexpress.com

206495


206496
 

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Discussion Starter #5
See if it will make your bike run 80mph. I know, with your mods it already does.
74 mph on level road, and 83 on a downhill is my max and yeah, looking forward to the test ride!
 

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Discussion Starter #6 (Edited)
I've got some good news, the bike is up and running and the engine is ticking over as smooth as silk, it's already 5:30 pm and getting dark over here so I won't be able to go for a test ride until tomorrow morning but so far I'm very impressed with the US $10 cdi

I don't know how the bike is going to perform in the higher revs, I'm going to have to wait and see how it goes

The wiring is tricky but thanks to the YouTube video I was able to do it right the first time around



206514


 

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Discussion Starter #11
I just returned from my test ride and the bike starts and idles perfectly but when I open up the throttle there is not enough power, the revs pick up but there is something not right.

I'm going to go over all the wires and connections to see if everything was done right and then I'm going to try again.
 

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Discussion Starter #13
It's a 1990 model

I've been chasing the problem today but no solution so far, my bike is stuttering with both cdi's, the stator and the coil are giving the right ohm readings, my cdi from America will arrive around end of next week so we'll see what happens next🙃
 

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Proper ignition timing seems to be the issue with these Chinese CDI's. You're probably better off going with the Waterloo CDI - bad timing can ruin your top end, which will far exceed the cost of a good CDI.
 

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Discussion Starter #19
There are a number of TW owners that did this conversion and was successful, just look at the YouTube video at the start of the thread so I'm wondering.... anyway I have to call it a day, its getting dark over here
 
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