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So attempted a first start up today. Sounds good on turnover but no fire up. Saw a spark twice (weak) with plug out and earthed well (new plug). I suspect CDI unit ?? What do you all think ? Should I look somewhere else .
 

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Yours is either an '87 or an '98, so your CDI is supposed to be the one before the Y/R wire was introduced.

Two things. Be aware that the early Gen 1 CDI had no Y/R wire; if you go to source a new one you'll need to be mindful of that. Check to make sure that a previous owner, unaware of the Y/R phenomenon, didn't source a later CDI.

You should also confirm that you are getting fuel into the carburetor bowl. Crack the drain screw to check.
Check the valve lash; too tight = very hard starting.
While the valve cover is off, check the valve timing.

I don't have a Gen 1 and have no practical experience with their ignitions to offer, but I post this up on the chance you have no manual to refer to.


It's going to be a troubleshooting routine checking for air, fuel, and spark at the right time.
 

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Some times it is handy to know if you have a starting problem or a running problem.

You might try:
Jumping to a car battery.
A shot of starting fluid in the air box.
Push/pull starting.
 
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