Maintenance & Technical > KX500 Original
Harder starting all of a sudden, looking for input
jcm3:
--- Quote from: Foxx4Beaver on February 09, 2015, 06:31:22 AM ---not that you wanna hear it, but I think it would be best to pull the reed block right out so you can "really" get a good look, over just "looking down in there"....
--- End quote ---
Took the carb off (love these old two strokes, that would have been a BEAR on my 2011 YZ450 that I used to have) and removed the reed cage, all looks well. It started better today, but still seemed like I needed to crack the throttle just a tad when I didn't used to have to do that before.
It may be that the floats are off, I'll have to do some adjustments on it and see if it helps. It seems to run great. Thanks for the tip.
sandblaster:
120LB compression?
Ah.... not the best for a new engine.
I checked mine cold and got over 180... but I'd have to see what I recorded for exact numbers.
jcm3:
--- Quote from: sandblaster on February 09, 2015, 04:42:43 PM ---120LB compression?
Ah.... not the best for a new engine.
I checked mine cold and got over 180... but I'd have to see what I recorded for exact numbers.
--- End quote ---
Yeah, not sure if that is because the new tester I got is not working right, or what. I wanted to borrow my buddy's again, but he can't find it. The bike made 135 psi on his tester, and I think might have been on the stock piston and rings after 15 years.
I got one from Wake2Moto off of eBay.
sandblaster:
Yeah, probably a bad read...
Foxx4Beaver:
--- Quote from: jcm3 on February 09, 2015, 04:24:00 PM ---Took the carb off (love these old two strokes, that would have been a BEAR on my 2011 YZ450 that I used to have) and removed the reed cage, all looks well. It started better today, but still seemed like I needed to crack the throttle just a tad when I didn't used to have to do that before.
It may be that the floats are off, I'll have to do some adjustments on it and see if it helps. It seems to run great. Thanks for the tip.
--- End quote ---
if you say it's running great and starting ok, and providing it's not suckin air some where....I wouldn't worry too much about having to crack the throttle a touch when starting it.
I have to do the same thing with mine when it's cold...and honestly, I prefer it that way. Before I put my new carb on, it would start without having to touch the throttle...and, sometimes if it hadn't been started for a couple weeks, it would idle fairly high the second it lit off, then I'd be scrambling to get to the choke to "feather" it for a few seconds until it settled down...but if it had been running the day before, it would just start and idle normally...a different slide or slight jetting change may have cured this, but I wasn't concerned with it.
Not that you're experiencing any of these issues, but having to crack the throttle can give you some control over how it idles on it's first few seconds of running...because one of the worst things for a cold motor, is to have it rev to the moon :-o
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