Maintenance & Technical > KX500 Original
Jetting!!! Again and again and again!
Paul:
It all makes sense now...
I run mine at 50:1 with Maxima Super M and I don't get the smoking problem or the idling problems. I also don't have carbon build up of any kind in the cylinder or power valves. I also race this bike at that mix and I've never had a failure. I put a couple hundred miles a month on that engine.
gowen:
:idea: Hmmmm.. Here's the problem though, because we go out riding in large groups, I share the fuel between my 250 ('97 cr) and my kx. In which both are running between C12 and Spirits (100 RON + 93 MON?). All other bikes have their mixture of pump with 32:1. I'm afriad to try 50:1 in my cr. So, I'll just make a new batch of gas for my KX and give it a shot. I'm taking this Thursday or Friday off so I'll get back with the results.
Paul, should I use Super M? I have no PV buildup in a year (just checked them) and bearly any carbon build up in the cylinder. Do you think using Castor based oils is a good idea? I do have some H1R left over, is that any good in your oppinion? I see KXCam is running H1R @ 60:1? Wow, I'm scared to even try 50:1. But, hell it might be worth it and save me alot of oil. :lol:
KXcam22:
Gowen,
32:1 sure seems rich to me when using synthetic oil. Last time I used 32:1 was penzoil mineral oil in the late '70's. I raced for years with Belray MC-1 at 85:1 (it was the recommended mix on the bottle). No smoke, no carbon great power and excellent cylinder longevity made me a Belray fan (fanatic?). The only oil failures I ever had were at 32:1 with the mineral oil. I recently emailed belray to ask why the old mc-1 said 85:1 and the new bottles say 50:1. The answer I got was that people were leery about the lean ratio (not socially acceptable) so they changed the text on the bottle even though it was tested to be best at 85:1. Heck, my Yamaha outboard runs 100:1 yamalube. My '92 KX is very happy at 60:1 with H1-R, idles, 1-kick starts, and no smoke. Haven't had to clean the power valve. I may be a Belray nut but I think all the new synthetic oils are quite excellent. Lots of my friends swear by Super M. Try It. I'll bet your CR likes it too. Cam.
Paul:
I ran my CR500 @ 50:1 with Super M, so don't worry about the red machine ;)
gowen:
I just picked up a 5 gallon can of C12, thinking I'm going to try a 50/50 of C12 and Amoco 93 using H1R @ 50:1 for starters. I'll let you guys know when I can get enough time off to ride before the weekend. :popcorn:
BTW, doordie, what do you run in your ice racer? Knowing it is a WOT machine. or if anybody else knows..
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