Pretty in Pink, dunno why
Join Date: Feb 2009
Location: Redondo Beach
I don't know what you may have done to your bike, but you can make some rather noticeable improvements for next to no money, up to a max of maybe $300.
First, the 22 cent mod can be done for, uh, 22 cents and an hour of work. This will give you a noticeable improvement, especially if coupled with the snorkel and L-Mod.
The low-speed screw can often be adjusted to give better off-idle performance, and the Mercedes valve mod give you a bit of a boost. I did both and noticed small, though likely immeasurable, improvements.
For about $25 you can install a KLX needle, which might require a smaller jet. The KLX needle is a whole lot richer in profile than the stock needle.
Add another $300 and you can install an after market pipe, which will allow running a richer jet. It will have the double effect of removing about 7-8 pounds of weight.
I'm running with the snorkel out, L-Mod done, and IDS2 with four disks, KLX needle at the top clip, and a stock jet at an AFR that averages 13.5. Under full throttle the AFR drops to 12.5. All of this gives me maybe a 10% improvement, but 4 ponies is 4 ponies.This weekend I will be switching to a smaller jet and raising the needle, shooting for an AFR of about 14 with a WOT AFR of 13.5.
The IDS2 with four disks is about as loud as stock; I had eight disks and it was way too loud.
If any of these options sound good, you can search the forum for info, or we'll be glad to talk you through them in more detail.
My thoughts on engine performance mods for the KLR is that you want to preserve the nice, broad power and torque curves. All of the above will do that. Adding a 685 kit will also do that, but you've got to answer for yourself if you're still in the right ballpark with respect to bang for yer buck.