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Post by gkdrummer on Oct 25, 2018 15:58:27 GMT -6
My 1989 Kawasaki 454 ltd starts up with full choke on,and stays started but when i try to close up the choke or give it throttle it bogs down.
The person we bought it from said he seafomed the fuel lines and cleaned the Carb.
Anyone have an idea why?
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Post by Blaine on Oct 26, 2018 5:43:17 GMT -6
My 1989 Kawasaki 454 ltd starts up with full choke on,and stays started but when i try to close up the choke or give it throttle it bogs down. The person we bought it from said he seafomed the fuel lines and cleaned the Carb. Anyone have an idea why? That is usually a sign of a plugged/dirty pilot jet....They may have cleaned the carb & overlooked the pilot jet/idlecurcit. |
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Post by tinlizzie37 on Nov 9, 2018 17:23:59 GMT -6
Dumping some Seafoam into the gas tank, is not cleaning the carbs. You have to take them off and disassemble them and soak the parts and such. The job takes a while so have patience. Always put a fuel filter on.
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Post by actionverb on Nov 11, 2018 1:55:17 GMT -6
Had the same problem when I first started working on mine, before I knew anything. Found out quick like on this site the bikes need the air filters on it. Make sure it's not sucking too much air or has a vacuum issue.
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Post by bikeman on Nov 11, 2018 5:03:52 GMT -6
hi. the OP has given his own answer to the problem he asked about. he just doesn't know it.
I will explain for the benefit of members who read this.
the scenario he posed is a classic case of plugged pilot jets or small passageways in the carbs. the diagnostic tool for this is the "choke" because these carbs DO NOT HAVE A CHOKE. the choke refers to a air restricting flap on the air intake side of the carb. it reduces the amount of air entering the engine to give a over rich mixture for starting a cold engine.
CVK carbs have no such device on them. instead they have an "ENRICHER CIRCUIT" this allows more fuel to be channelled into the engine through a extra set of variable jets and passageways directly into the inlet port side of the carbs. this enricher increases the amount of fuel entering the engine to rich up the mixture. as opposed to reducing the air intake.
why does this matter well the enricher circuit can be used as a diagnostic tool when conventional choke cannot. as it puts extra fuel into the engine over and beyond the capabilities of the pilot circuits. it allows the engine to run even if the pilot circuits are blocked. if the engine dies when it is turned off. you have a classic case of blocked pilots. it can also be used to diagnose a bog. while the engine is in a state of bogging applying the "CHOKE" will either make it better or worse if it makes it better the bog is due to a weak mixture where if it is worse the bog is caused by a rich mixture. this makes it easier to understand what's wrong and how to cure it.
in the OP's case this points to the pilots. they have to be clean and free from debris to stop this happening again a filter should be fitted once they are cleared.
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