94camroz28 wrote on 08/11/14 at 14:45:58:...when I am decelerating from somewhat of a higher rpm and no throttle, I get a handful of large pops.
My bike is completely stock inside and out. The only thing I've changed is I pulled the brass plug and adjusted the idle mixture screw out just over a half turn. That did help a lot, but its still an issue.
Also, the bike will run fine when cold and on half choke, but it seems to really want half choke for quite some time. It seems as if its happier with more fuel. Would this be a pilot and/or a main jet change?
I'm on the East coast, at sea level. After cleaning the carb, changing jets, and adjusting the idle mix screw and idle speed, I still had enough loud gunshot-like pops to startle the folks I ride with, so I cut 1/2 round off the TEV spring. That reduced the gunshot cracks to just about zero and cut way down on the usual burbling, too.
YMMV. I would try other things first, since this spring may be hard to locate if the fix doesn't work for you or makes things worse, but it's made riding the S40 a much more pleasurable experience for me, with little effect on mileage.