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post #1 of 9 (permalink) Old 11-19-2008, 08:45 PM Thread Starter
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Mechanical carbs

Has anyone tried to put mechanical carbs on the teryx? With all the vaccum dilemas. They may even open up some more hp.
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post #2 of 9 (permalink) Old 11-19-2008, 11:39 PM
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I'm sure someone has but then you have a new problem. A bog right off idle if you stomp the throttle. With mechanical you have to mash the pedal not stab or you lose the vacuum signal the carb for a second or two and get a bog.


Ever driven a car with a Quadra-Jet carb on it? If you stomped them, it would bog too.

Come on Fuel Injection!!!



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post #3 of 9 (permalink) Old 11-20-2008, 12:18 AM
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Quote:
Originally Posted by ter-rex View Post
Has anyone tried to put mechanical carbs on the teryx? With all the vaccum dilemas. They may even open up some more hp.
Yes, Keihin FCRs are fantastic carbs with all the latest technology for carburetors. And, they have an accelorator pump. Properly tuned, there is no bog.

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post #4 of 9 (permalink) Old 11-20-2008, 06:23 AM
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Yeah, the accelerator pump helps this out. What I have seen is the weight of the these vehicles make the bog worse. On say a raptor 660 it would much less of an effect.



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post #5 of 9 (permalink) Old 11-21-2008, 02:24 PM
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Todd i was wondering if there would be any benefit to removing the choke and either going to some sort of primer kit or just leaving it off. I havent had a look at the carbs yet as mine is brand new, but it is something we do on jet skis, you can remove the choke plate and butterfly and add a little more flow, without adversely affecting the vacuum signal. The primers we use have brass nipples that press in where the choke shaft holes were, one is a plug and the other a spigot feed, for each carb. You splice the t fitting into the fuel line and when youe machine is cold, a couple of pumps of the primer shoot fuel directly in the carbs and the machine fires right up. Thanks.
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post #6 of 9 (permalink) Old 11-21-2008, 04:32 PM
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The carb on the Teryx does not have a choke plate, it has a enricher circuit, I think they call it that. Either way not plate.

There is a fuel bleed behind the throttle plate



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post #7 of 9 (permalink) Old 11-21-2008, 05:32 PM
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Cool, thanks for the TECH-SPLANATION!! So the choke knob opens this enrichment circuit then?
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post #8 of 9 (permalink) Old 11-23-2008, 06:17 AM
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That is right. There is a plunger in there and it pulls it open.



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post #9 of 9 (permalink) Old 11-23-2008, 08:30 AM
 
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chase runs 39fcrs on his 840 with no problems
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