Not necessarily. I know from experience that adjusting the mixture will affect the amount the engine smokes.


Also, don't assume it was set right from the factory.

 

For question I have is did you remove the Oil injector system??? I would get rid of it. We got rid of ours just for the fact that they do have a tendency to screw up...hence causing you to do some serious damage to the motor.

try talking to Greg Peak Dirtrides.com, WRHracing.com Billy Holt, Hetrickracing.com . I know they do come onto this site also. Check out their websites and give them a call.

If were you I would change my post topic to "Hey Masterwrench can you Help me" LOL!!! He is also a guy who know's his Kasea's/LRX.

try miniatvs.com that site is for mini's only.

Goodluck

 

Yes, .... The factory oil injection is still hooked up. And could very well be dumping way to much oil in. I'll try to find some more info on it and check out the other suggested web pages. I'm going to look into the oil mix before anything. If someone wants to post a suggestion on fine tuning the oil mixer that would be great. I'm not sure if I want to remove it cuz we go on some long rides and I can always swipe some gas out of a 4 stroke for it. But I guess I could keep some oil on hand too.

 

Well, there is nothing I could find on adjusting the oil injection. So I took the gear off the crank shaft for the oil pump and mixed the gas 40:1.. It smokes about 50% less now. I will be switching to a synthetic mix and try 50:1. I'm also going to be rejetting it and will let you know how it runs with the K&N restricted

 

if you have added a k&n filter you must rejet. i would start with about a 110 main and go from there. read the plug and go up or down, the plug will tell you all of this. also since you have added airflow to the stock carb you will have to drill the float needle seat bigger. at wide open throttle the fuel bowl will empty and the quad will sputter. the stock carb is very hard to get the jetting right with a high flow filter. at wrh racing we will not put a k&n or uni filter on a stock carb because of the jetting problem.

Mark

 

rscoyote,

As a suggestion, pre-mix at 32:1 to set your carb. After you get the low & high speed jet(s) set properly, then adjust your pre-mix ratio. To me, 50:1 seems a little too thin of ratio. At this ratio, your piston/rings and head will heat up too much. I know it smokes less at 50:1 (from your above comments) but I suspect the mass amount of smoke is from improper jet mixture - NOT improper Oil Mixture.

If wondering, I've removed the oil injection system from our '03 Pred-90. I run around 34:1 and our average ground speed is 15 MPH. For our unit, it smokes really good when the engine is cold or when gunned from an idle. For example, giving it lots of gas to zip up a hill or in the deep mud. When driving at a steady speed, my son's unit only has a small visual of smoke coming out its pipe. When the jets are tuned properly and the mixture is "just right", it should only have very little smoke. To tell you the truth, my weed eater and chain saw smoke more then our Pred-90. Then again, I enjoy playing with my son's quad more then my own toys.

If you feel uncomfortable setting the jets, perhaps there's a small engine specialist (or neighbour who works for a few beers) who can help you? Purchasing / replacing an improperly jettted 2 stroke engine with a 4 stroke seems like an extreme. When properly tuned, 2 strokes can be lots of fun to drive and follow close up. Hopefully, you can find someone in your neighborhood who can help "tweak" its carb jet and final Oil Mixture ratio for you.

.

 

Thanks for the info.... In my last reply I meant to say "run the K&N unrestricted" My dirt bike riding buddy is a carb mechanic by trade. Its just a matter of him getting the time to help me if I run into trouble. Some times better to get a second opinion than his, because I know he don't like this Kasea..... Spike99 what carb do you run with a K&N, and are there any used carbs from another bike that I could adapt to save some money?

 

For a long time, I did lots of research on the K&N Filter, uni-filter and even foam pod filters. Many people like these filter upgrades over the factory air-boxes because they let more air in the carb, and can give an engine the "extra boost". Unrestricted air flow can create dramatic performance gain. For more performance upgrade details, surf: - Air Filter Upgrade Evaluation -

For our unique deep mud and water "trail only" conditions, I decided NOT to go with these open filters. Water and open air filters don't mix very well. Instead, I replaced the factory snorkle on our Predator 90 air box with a shorter pipe that has a better air flow bend in it. Actually, it's a modified pipe from an old washing machine discharge pipe I found in my attic. Now I know why my wife calls me "a pack rat". Anyway, we are running with the factory carb and this modified snorkle. If I was into racing or into dry trails, I'd probably go with the uni-filter. Some say the K&N doesn't keep ALL the dirt / dust out. Some swear by the K&N filter.

For a visual of our modified snorkle pipe, surf:
- Picture 1 -
- Picture 2 -
- Picture 3 -
- Picture 4 -

For the most optiminal carb size for your Kasea (based on your unique riding conditions), I would recommend you contact Greg Peak at www.dirtrides.com or Billy Holt @ WRH Racing. These folks specialize in mini-quad racing and engine performance parts. As a baseline, I'm sure each of them could recommend a "base jet setting" to start with. From there, you'll have to "tweak the jet settings" based on your altitude, temperature, other performance parts, etc.

Hope this helps as well...

.