Maintenance & Technical > KX500 Original
K5 vibrates real bad.
sandblaster:
Starting high on jetting and working your way down is safe..
We start at the following:
55 pilot
168 main
Middle on the clip
However, not knowing your porting specs can cause jetting issues.
So, get your pilot dialed in first.
Try a 55 and see how close your idle screw is to 1.5 turns out.
Your looking for 1.5 to 2 turns...
Once the pilot is done, then do wide open throttle chops and check your plug.
sandblaster:
--- Quote from: Foxx4Beaver on November 10, 2016, 06:11:46 AM ---Another possibility, not to trash whomever did the port work...but it could be out of whack, and not done properly.
--- End quote ---
Exactly what I was thinking when I made my last post.
If you open them to much in the wrong places you will need to go richer... Sometimes a lot richer because you reduced the velocity..
Foxx4Beaver:
Start with a 58 Pilot....as none of us on here know what your specs are. If it still feels sluggish, and blubbery, then go down to a 55 Pilot.....small increments at a time.
umberto:
I have an 88 in Goliath, and the jetting was very far off when I first fired it up. I had a lot of trouble getting it to run correctly, and eventually took Foxx's advice and bought a Lectron (which fixed the issue). Once I had the Lectron on, DoldGuy suggested I check the gasket under the main jet block. They get pretty ratty and can allow fuel around the main jet, causing issues. That was what was causing mine to act up. I found a cheap replacement on eBay. I would definitely keep messing with your jets, but it might be something to check just to make sure.
dirkster:
just started messing with it put in a 170 main, ran better but was choppy up top. definitely need a smaller pilot jet, idle screw is all the way in and it still needs some throttle to run. had the needle set at 3rd notch. moved the needle position all the way down to see if it made a difference, it ran worse with the needle all the way down. moved the clip all the way to the top and it ran better than it had all month. still too rich though, give it a rev and there is still quite a bit of smoke. going to go get some different pilot jets closes place that sells jets is 26 miles. i believe the sleave job and porting was done by kustom kraft.
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