Maintenance & Technical > KX500 Original
easy to start
KXcam22:
Barry,
No snow yet, late this year. Last year I was riding in 6" at halloween. With respect to your jetting, I would suggest upsizing your pilot first to the chart size. It will have quite an effect on how well it starts. I have been playing between 55 and 58. I can't feel much difference in low speed carburation but the 58 starts better hot. Had more of a tendency to cough instead of start. Also, that chart is extremely close. I fine tuned mine over a period of about 5 years until it was running primo - and ended up with the exact settings on the chart. The main size will also effect how smoothly the midrange tapers into the top end. To save time you could start with the exact chart settings and go for a short ride to see how it feels. You might be supprised. Hope this helps. Cam.
barryadam:
Thanks Cam, I'm definately going from the 55 to a 58 pilot. However the main at 155 is really not bad, and I'm a bit leary of going all the way to a 165 or 168 on the main (just plain messy!). I might try it one step at a time. I am seriously going to add the reed spacer and the VForce soon, though. Sounds like a winner.
More importantly, I need to get the back tire balanced. After adding the Baja Designs kit and riding on the pavement, I noticed how it's really wobbly at high speed. I had to force the shop guy to put my KDX rear rim on a dynamic balancer, but once he added about 16 oz of weight opposite the rim lock, it is really smooth at speed.
B
hoopty:
--- Quote from: barryadam ---...and I'm a bit leary of going all the way to a 165 or 168 on the main (just plain messy!)...
--- End quote ---
It's not the jetting that makes the spooge, it's the gas/oil ratio. With any modern synthetic you can run safely @ 50:1 and with Amsoil I run @ 100:1 and use a 58 pilot, stock needle in center clip, 175 main, 1.5 turns on the airscrew.
First or second kick starts all the time and she's a dune beast ;)
KXcam22:
Barryadam,
Yeah at speed I have run 2 opposed rimlocks in leu of balancing. The 155 sounds lean (mine is 165, 60:1 @2500') but you are the best judge looking at the plug. Just have to be careful that sometimes a riding plug reading on a 500 doesn't show enough wide open running to give a good main jet reading - get mostly a midrange reading. It can be lean up top and not show - then it shows up the hard way when you blast through a long sand wash or fireroad. A true plug chop test will tell the tale. Good luck. Cam.
barryadam:
hoopty: My problem is what cam refers to. I'm really just tractoring around most of the time, so it tends to load up and get messy. I've recently switched to Yamalube 2R and 40:1. I'm considering trying 50:1 on the next mix, along with my jetting changes.
cam: You're absolutely right. This last ride was one of the first times I've been able to open her up and still I didn't have the 8@11s to hold it WFO. So under normal riding, it's impossible to get a plug reading. Definitely need to get that rear balanced, though. Waiting for the next time Cycle Gear has Maxxis ITs on sale ($89 total for f&r mounted). I'll have to look for the rim lock location to see if I can offset with another one easily.
Barry
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version