My dad and I have two XR650Ls, one is a 2005, the other is a 2008. We've been trying to get the carburetor tuned, but we've been having some trouble finding the right way to route all the hoses. Both of them have had Dave's mod done, and they've been uncorked and have an FMF Powercore 4 slip on exhaust. They're jetted at 55 and 158 at about 6,500 feet above sea level.
Fairly often, when I'm cruising around 40 mph, the exhaust pops and the bike loses power for a split second. That's the main problem that I've noticed.
Also, on my bike, if I let off the throttle without pulling in the clutch, it pops a ton. I know some popping is normal, but it seems like it's a bit excessive.
If anyone has any tips on routing the carburetor hoses, or any other tips to get them running right, it'd be greatly appreciated. Thank you.