CDI restriction

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biofotis
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CDI restriction

Post by biofotis » Fri Aug 04, 2017 2:11 pm

Hello,

I have two CDIs one 33c70 and a 33c10
I tested both of them and it looks like the 33c10 reduces power at around 12000rpm. The 33c70 on the other hand goes strong up to 14000 so there is definitely a restriction.
So I opened them up to see the different.
To my surprise they are using bridges to short some pins and set different settings.
So in my case there are two 0 ohm resistors (just bridges) underneath the PCB close to the big IC.
I am pretty sure if I remove them I will have the same effect. I will try this today.

Anyone else who wants to share some findings? Maybe a Kit CDI?
Image

biofotis
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Re: CDI restriction

Post by biofotis » Fri Aug 04, 2017 7:28 pm

Yes i was right. The mod above made a huge difference on the bike. Now revs to 14000 with no hesitation like the 33c70 cdi.
Its a worth doing mod! And only takes a few minutes.

Another thing worth doing is the gear sensor mod. Its not only for 180kmh but if your selector is like mine you will get restriction on other gears as well. My selector was giving a wrong resistance on second gear but now i bypassed it and works great
Last edited by biofotis on Fri Aug 04, 2017 11:47 pm, edited 1 time in total.

moforockband
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Bike owned: GK73a SP CRM250 mk3
Re: CDI restriction

Post by moforockband » Fri Aug 04, 2017 9:21 pm

good find. 33c10 is from the 'L' model 76a 400. The 33c70 is from the 'M/N' model.

biofotis
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Re: CDI restriction

Post by biofotis » Fri Aug 04, 2017 11:47 pm

yes that means the L model has a restriction on the CDI


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