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1986 Suzuki lt230s full throttle problems


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hey guys,

im new to the forum and i need some information im hoping someone can help me out with. i have an 86 suzuki lt230s that i just did a full rebuild on. basically new everything including a new high flow air filter and a new high flow exhaust as well as a carb rebuild kit. I got it running very well until i give it full throttle in which i lose all power and it acts like it wants to stall. I richened the mid range mixture almost all the way after several attempts of being a tuning problem and it seems to have improved it but it still isnt 100 percent. Anything after about 7/8 throttle and this problem occurs... based on what the book says i either have it too lean yet (which may be the case cause im trying to get it running in 30 degree weather) or i have the wrong jetting in my carb (which i hope isnt the case). It is a possiblity that it is still too lean with the cold weather, the high flow air filter, and high flow exhaust... does anyone have any suggestions for me?

Im just not too sure of the jetting options i have other than stock due to the age of the quad in general.

thanks fellers,


Edited by berryjo5
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You need to run richer jetting with higher air flow and aftermarket exhuast. You will likely need to go up a few sizes on your main jet, after installing the bigger main jet, you can probably move your needle clip back to a leaner spot. As for the pilot circuit goes, you should be able to get the adjustment you need by turning the screw out a bit, if you can't get rich enough by adjusting the screw, you will want a bigger pilot jet. Also keep in mind, if you are running with a modified airbox lid, or no lid at all, you will need to go even richer. BTW, I am going to delete your post in the other thread, since you have your own thread here. Good luck.

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