Posted July 30, 2001 - 10:21 AM
I searched the archives on this topic, but I couldn't find any info on my particular question. I tore my bike apart last week and fixed some of the dealers mistakes, they had removed the throttle stop completely, so I trimmed it and put it back in, I also put in a bigger pilot jet (#48), after putting the bike back together I ran it, and it felt very rich in first and second gear. When I say it felt rich, it felt like a really rich or cold two stroke. It felt very bubbly, but cleand out in third gear. It felt rich with the throttle wide open. At lower throttle settings it feels fine in first and second gear, my question is am I hitting the Rev-limiter, or am I too rich on the main jet. I don't experience the bubbling sensation in taller gears, but it may be because the enging has enough RPM to overcome the additional fuel. I am running a 172 main, with a White bros E-series, s-bend with twelve disks, airbox removed and grey wire cut.
Thanks for your help,
Posted July 30, 2001 - 10:57 AM
Posted July 30, 2001 - 11:06 AM
It is a 01 426, and I live at sea level (240 feet), in Lemoore Ca I typically ride in the desert around China lake ca and mesquite NV. I put the bigger pilot in the bike because I was getting some good backfiring on decel, and the new pilot seems to have helped that problem. I am currently 1 1/2 turns out on the fuel screw. I hope that is the info you are looking for, thanks for the help.
Posted July 30, 2001 - 11:26 AM
Posted July 30, 2001 - 11:38 AM
I did try a 45 pilot from 1-3 turns out and it didn't seem to help my backfiring problem, so I went a bigger pilot.
It has been really hot here as of late, and I think that I might be a size to big on the MJ, so I will going down one on the MJ to try and solve my problem. Any thought to changing the needle jet, I know a lot of guys are running EKP needles. I love the bike, but I am trying to fix some less than optimum set up work from the dealer I bought my bike from. I am still pretty new to the whole 4-stroke thing, but I will never go back, I love this bike.
Thanks for the help,
Posted July 30, 2001 - 11:58 AM
Posted July 30, 2001 - 01:41 PM
I have not looked for leaks as of yet. I wouldn't be surprised, when I got the bike from the dealer, I had them install the White Bros exhaust, and the mechanic had installed the disk backwards, and there have been several other things that have been wrong with the initial set-up of the bike.
The back firing i am experiencing is mostly at the tail pipe (popping). However, there is the occasional backfire through the carb.
Posted July 31, 2001 - 08:46 AM
Try a range of jets and feel how the power hits. Then you'll know if you found the sweet spot!!!!!!!!