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Makotosun

CT3 - starting problem

  • Gallotti
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CT3 - starting problem was created by Gallotti

hi guys,
I can't get my CT3 to start.
I have completely restored it, put the VAPE ignition system on it (BTDC 1.8mm piston), new Polini CP 24mm carb, K&N air filter, new piston rings, new spark plug (makes spark). Opened and cleaned engine piece by piece. I got the oils you guys recommended.
To date I have been able to start it for 5 seconds with the throttle all the way open and I find that odd. It makes a nice white smoke and as soon as I let off the gas it shuts off.
It's like it can't get pressure. I used to have a Husqvarna and if I went down a couple of times with the kickstarter lever you could feel the resistance....then I kicked and it started. This one doesn't.
I think I've checked everything. I also disconnected the oil pump because I thought it was greased (spark plug was greasy).
Heeeeeeelp me:)
Melvin

 
03 Jun 2021 22:12 #1

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Replied by darinm on topic CT3 - starting problem

Red flags for me at the carb and the K&N. If you have the original carb I'd just clean it up and put it back on. Then use an oiled foam uni filter. If it's a K&N pod filter they are a disaster for jetting and letting dust in.
1972 Yamaha CT2 175
1972 Suzuki TS185 Sierra
1997 BMW R1200R
2009 BMW X-Country 650
2013 Yamaha XT250

03 Jun 2021 22:21 #2

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  • Gallotti
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Replied by Gallotti on topic CT3 - starting problem

The old carburetor is gone and the new one is a bomb in comparison. I understand that the filter can create problems in the long run, but right away at the ignition? I doubt it...
04 Jun 2021 01:23 #3

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Replied by RT325 on topic CT3 - starting problem

Sounds a bit like the right side crank seal popped out when you weren't looking. Plug would be very oily though if that's the case. Are you sure the new carb has the main jet fitted & not left out. Piston in the right way around with holes to the rear as i've seen that before & runs a bit like you say. Sorry if i'm asking silly questions but hey, gotta come up with something.
04 Jun 2021 01:34 #4

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  • Gallotti
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Replied by Gallotti on topic CT3 - starting problem

It doesn't leak a drop of oil. All bearings and seals have been replaced, all new.
Carburetor mounted correctly, main jet installed. Piston correctly mounted.
Will be missed, no stupid questions.
04 Jun 2021 03:41 #5

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Replied by Stockrod on topic CT3 - starting problem

Did you get it going
13 Aug 2022 15:37 #6

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