Kawasaki FX730V

There is no low speed adjustment. You can adjust the carbureted low idle. And the governed low idle. EPA does not allow adjustable jets.
 
txmowman said:
There is no low speed adjustment. You can adjust the carbureted low idle. And the governed low idle. EPA does not allow adjustable jets.
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BS, There are two low speed idle mixture screws under two small welch plugs. Now welch plugs are expensive @ about $7 retail. ANd you have to destroy them to access the screws. Most times they never need to be touched.

See items 16187 (16187-7005) and 92066A (92066-7009)

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If BS is what I think it is, how professional. These screws are idle port mixture screws, both flow fuel at both low and high idle. They are covered by a welch plug for a reason as they are set by the carburetor manufacturer and are not intended for "tuning". The only low speed adjustment is for idle rpm.
 
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You simply tune for best speed at idle and then set idle speed via the idle speed screw. And these do get out of adjustment at times due equipment age. And I have seen them broken off by DIYers or completely missing where the welch had fallen out and equipment vibrated the screws out.

It like they don't want you installing bushings in the carbs but I do it anyway.
 
Problem with engine surging at low speed that can be stopped by partially choking the engine was the reason I am looking for the idle jet screw.
 
There is no adjustment for that. Either there is a welch plug missing, as referenced in the above picture as 92066 or there is junk in the fuel system or a slight air leak somewhere.
 
Appreciate the information. Welch plugs are good and air leaks have been checked. Is the next option to rebuild it?
 
txmowman said:
There is no adjustment for that. Either there is a welch plug missing, as referenced in the above picture as 92066 or there is junk in the fuel system or a slight air leak somewhere.
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Next you be telling me resizing jets does nothing and all those micro bits that I have are not real.

Now of course air could seeping past the throttle shaft leaning out the fuel mixture.
 
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get some WD40 and saturate the area around your throttle shaft and where the carb meets the intake, while the engine is running. If you have a change in engine speed or how the engine runs, you've found an air leak. I've had 3 carbs this year with worn out throttle shafts causing surging.
 
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