Kawasaki FX730V

[txmowman]

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.

@StarTech you are stuck in the 1970’s. Drilling out jets is to compensate for you not knowing how to properly diagnose and repair the issue.

 

[StarTech]

@StarTech you are stuck in the 1970’s. Drilling out jets is to compensate for you not knowing how to properly diagnose and repair the issue.

No I am not as a lot of the aftermarket carburetors has to be properly calibrated. I recently had open up the idle jet on a Nikki single barrel clone due to off load lean burn surging. The idle mixture screw was completely inoperative until I did. Also several Walbro carburetors that uses fuel bowl bolt jets has to be resize at times for the same lean burn surging. Sometimes that is just to remove the oxidation layer of the brass. Beside lean burn is cause by the EPA requirements that actually causing more pollution. Sometimes all it takes is a hundredth of a millimeter.

Stop listening all misinformation out there. There are times that things simply has to re-engineered to correct a manufacturing flaw. Why do you we get service bulletins on mods? Some of them are actually come from mechanics like myself report a problem and our solution for it.

I also save a lot of the OEM carbs too by install bushings on throttle and choke shafts when they wear out the carburetor through holes. Lately I have been using schedule 80 1/8 NPT brass pipe to make my bushings.

Or times when the choke butterfly vane has to be modified due to correct an under choking or over choking problem.

And I suppose you would tell me there is no way around the safety control module on the JD Z830, Z925, and Z950 but I done up to a triple bypass on them and still have all the safeties intact. I current have two Z830 and one each of the Z925 and Z950 in field right now that bypasses have been done on. I was told it was impossible but I know better.

 

[Tiger Small Engine]

No I am not as a lot of the aftermarket carburetors has to be properly calibrated. I recently had open up the idle jet on a Nikki single barrel clone due to off load lean burn surging. The idle mixture screw was completely inoperative until I did. Also several Walbro carburetors that uses fuel bowl bolt jets has to be resize at times for the same lean burn surging. Sometimes that is just to remove the oxidation layer of the brass. Beside lean burn is cause by the EPA requirements that actually causing more pollution. Sometimes all it takes is a hundredth of a millimeter.

Stop listening all misinformation out there. There are times that things simply has to re-engineered to correct a manufacturing flaw. Why do you we get service bulletins on mods? Some of them are actually come from mechanics like myself report a problem and our solution for it.

I also save a lot of the OEM carbs too by install bushings on throttle and choke shafts when they wear out the carburetor through holes. Lately I have been using schedule 80 1/8 NPT brass pipe to make my bushings.

Or times when the choke butterfly vane has to be modified due to correct an under choking or over choking problem.

And I suppose you would tell me there is no way around the safety control module on the JD Z830, Z925, and Z950 but I done up to a triple bypass on them and still have all the safeties intact. I current have two Z830 and one each of the Z925 and Z950 in field right now that bypasses have been done on. I was told it was impossible but I know better.

With an open mind, we can all learn from others. Slight modifications on parts, such as carburetor jets, is sometimes what makes the difference. Learned something new about the Nikki carburetor in this thread for example.

 

[bertsmobile1]

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)

View attachment 69004

I will have a look back through my records and see if I kept proper notes
I have also adjusted those idle screws and the welch plug was replaced from a cube carb rebuild kit from memory