imported post
imported post
At your milage I would inspect the carb Jet needle for wear just below the clip where it passes through the slide.... Also the float needle and seat may be due for replacement soon, symptons are a weepy float bowl drain and rich running engine....
Your chain slider block that protects the swingarm will probably be due for replacement if it hasn't been already.... Also check the underside of the fuel tank for rub spots and apply padded tape over them to slow the wear....
The rear linkage and swingarm bearings should be regreased especially the link that goes to the frame.... Steering bearings also....
The fork oil should be changed and seals could probably use a wipe with a photo negative to remove grit if you dont' want to fully dissassemble the forks for cleaning....
I carry a prefab cover plate and a hose T in my tool kit just in case I experience the same misfortune as Dorky {and others} when a spill takes out the poorly located fuel tap.... Make sure to make some kind of gasket {rubber} to sandwich between the plate and the tank.....
And like Windaddiction said check your chain tension, if it looks just right then it's probably too tight.... I lean towards the slacker side of the checking method shown in the manual.....
The 640 is by far my favorite bike owned, hopefully it'll be that way for you...
David...