Thread: up graded cdi
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Old 09-10-2013, 02:54 PM
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Wild Bill Wild Bill is offline
Motorized Bicycle Elite Member
Join Date: Jan 2013
Location: Camarillo So. Cal.
Posts: 474
Default Re: up graded cdi

I put the Jaguar CDI on my china girl bike after doing some test runs with the stock ignition going both ways on the same stretch of road to eliminate the wind or breeze factor and possible road incline. Then I put on the Jag and picked up 2-3 mph and played around with the settings and the stock settings worked best. The difference was noticeable but not huge but 2-3 mph when your top speed is only around 35-40 its a nice gain.

But then a few weeks later someone said they didnt do anything and that people that race dont use them so since he was correct that people that race didnt use them I decided I better test it again, I want to get all I can from my bike and lying to my self isnt gonna make me any faster.

Then I mounted the stock coil next to the Jag and since I have quick connect plugs I went out to my test road and made several runs in each direction switching back and forth between the 2 ignitions and consistently saw the same 2-3 mph every time. I am using a digital speedo so I would get IIRC 41.2 mph and Im sure my speedo is consistent. I also retested the different settings on the Jag and found the same result, the stock setting was clearly the best setting.

One thing I cant say for sure is if the Jag cost acceleration to gain top end speed but it feels like acceleration is still the same with the Jag but Im using a shift kit so it wouldnt be so noticeable with the lower gears and up shifting as it would be with a single speed bike.

One thing to remember is that these chinese engines are very crude and the engine timing probably varies from one engine to another by large amounts in some cases. I am on my second engine and have retested both ignitions on the new engine with the same result as my first engine (both DAX F-80).
Its all fun and games until someone loses an eye, then its just fun!

Last edited by Wild Bill; 09-10-2013 at 03:03 PM.
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