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  #1  
Old 06-20-2008, 05:40 PM
Hunterworks Hunterworks is offline
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Join Date: Jun 2004
Location: Collinsville, MS
Posts: 5,600
Default Teryx CDI and engine miss

We have had a couple guys who have had an engine miss with the non-programmable cdi and curve 2 on the programmable one.

I have two here that were missing and I tested them on our Teryx with no problems.

It seems that any Teryx that is right near being too lean from the factory are the ones having the trouble.

Heres the deal. To achieve top performance you need the peak power point to be at 15 degrees after top dead center. Kawasaki severely de-tunes these engines with timing leaving a good bit of room for performance gains with just timing. With stock timing the peak pressure point is occurring after this point which hurts performance. They do this for reliability.

Now we advance the timing which fires the spark plug sooner than stock and allows more time for the fuel mixture to burn and allows the peak pressure point to be close to the optimal point of 15 degree after top dead center for maximum push against the piston.

So you take a engine that is border line lean and advance the timing and allow the fuel to burn longer you will run out of fuel to burn thus causing a lean condition.

Guys are reporting switching to curve 1 and the problem goes away and it is because there is not as much advance but they are losing some potential performance by doing this. The answer should be add more fuel with a needle position change and/or larger main jet.

I know this is going to sound like a selling point but the carb kit we sell will fix this problem for you and add some performance at the same time.

Now to toot our own horn here. Take these two guys who sent their CDI's back for us to test. What if we were like most other places and just sent them some replacements and they still got the same problem because the problem was not the CDI. The same guys would call back and still not get an answer then just ask for their money back. Everyone would be frustrated and there would still be four perfectly good CDI's that could not be sold as new and nobody would know why. These two guys would go out and just say the Dynatek CDI is not good and all the while it was their jetting.


We ran our Teryx on our dyno with these two CDI's with the load control on really hard which made the vehicle work really hard. We will also send these back with no return shipping even though there is nothing wrong with them.

Whether you buy these items from Hunterworks or not, make sure where you do buy it from can fully support it and don't just look at the price. Good service cost!!

Todd
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  #2  
Old 06-20-2008, 07:56 PM
whiteysrod whiteysrod is offline
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Join Date: Jan 2006
Posts: 229
Default Re: Teryx CDI and engine miss

how much do you want for one of these like new used cdis?!!!
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  #3  
Old 06-20-2008, 09:02 PM
Hunterworks Hunterworks is offline
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Join Date: Jun 2004
Location: Collinsville, MS
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Default Re: Teryx CDI and engine miss

I said if they would have bought them elsewhere. They both got their CDI's back that have no problems.

The point was most places you buy can't trouble shoot stuff for you and they just give you a replacement that still won't do you any good and then you give the product a bad name because no one helped you figure out it was something else.
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Old 05-26-2009, 11:19 AM
bviernow bviernow is offline
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Join Date: May 2009
Posts: 1
Default Re: Teryx CDI and engine miss

So if I am running a 840 kit with stage 3 cams and 11:1 compression should I switch to curve 3?
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  #5  
Old 05-27-2009, 06:40 AM
Hunterworks Hunterworks is offline
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Default Re: Teryx CDI and engine miss

Hard to say but curve two will surely be too much timing.
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