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73 CT3 175 itermitent spark

  • tsmitty1958
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73 CT3 175 itermitent spark was created by tsmitty1958

Hi Guys,
73 CT3, intermitent spark. When I took this engine apart, I did not touch the carb or the strator assembly. I figured it ran well enough so why mess with that. Replaced the bearing and seals. Put it all back together and the spark is white and intermitent. Replaced the points, same issue. Timing is set where I beleive it should be as I have 2 other CT3's that I have done the same things to and they run great. 

Any thoughts on the "intermitent" spark?

Tsmitty
The following user(s) Liked this Post: Reed valve Richards
18 Mar 2026 17:06 #1

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Replied by RT325 on topic 73 CT3 175 itermitent spark

Without being there it sounds like a condenser issue. Can alway mount an external condenser like honda do with it up at the coil--or buy a honda copy coil ready to go.But first look closely at your condenser. Engine mount bolts tight. Run an earth wire from motor up to the frame earth at the coil just to try. I'm guessing a lot. Nothing pinched behind the stator.
18 Mar 2026 19:14 #2

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  • Reed valve Richards
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Replied by Reed valve Richards on topic 73 CT3 175 itermitent spark

I feel for you, it's funny how stuff misbehaves just because you 'move' it. Had my neutral light decide to die on me while I was switching my stator out - these old bikes can be over sensitive sometimes ;)
Yo Joe, Go Joe
19 Mar 2026 00:42 #3

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