Maintenance & Technical > KX500 Original
First Top End rebuild - Need advice - Pics included
Kawasakinut:
--- Quote from: stewart on January 29, 2008, 03:36:58 PM ---its been my opion that the size or diameter of the bore and proper piston clearance is not achived by using a ball hone and if those sizes are right bore dia . striaght ness .etc..... the cylinder that his been plated makes better power the more its been run and and deglassing it did not improve the power on a plated cylinder
--- End quote ---
stewart i thought the ball hone was used to make the cross hack in the cylinder which makes for even oil flow throughout the cylinder. i'm not sure about the performance aspect. the ball hone takes nothing away from the cylinder just creates peaks and valleys. ok takes a little (mi-nute amount).
Jeeks:
BTW: This only pertains to the KX250 NOT 500! Didn't intend to hi-jack the thread. :wink:
The piece that looks like a twisted gear is the Main Valve Rod. Look on the front of your cylinder for a little cap that looks like a number '8', it has a phillips screw holding it in. The end of the rod has a notch cut in it, that notch will be toward the front of the engine when installed.
Jeeks:
--- Quote from: stewart on January 29, 2008, 03:36:58 PM ---its been my opion that the size or diameter of the bore and proper piston clearance is not achived by using a ball hone and if those sizes are right bore dia . striaght ness .etc..... the cylinder that his been plated makes better power the more its been run and and deglassing it did not improve the power on a plated cylinder
--- End quote ---
I don't use the hone to adjust the cylinder size in any way. I like to have a clean surface for the new rings to seat to without any wear from the previous piston. Just like sanding down a shaft when you install a new seal.
stewart:
i think honeing to a size for proper clearnce and cross hatch is essentiol for 2 or four stroke...i think deglazing the bore on a nonplated cylinder is fine 2 or 4 stroke they look nice ... but on a plated 2 stroke bore i found more power in the cylinder the longer i ran it with just changing pistons and rings no deglazing the where the bore size was right on size ....wiesco siad they sold a diamond whip type brush for 2 stroke deglaze .. but were not to big on ballbrushing ..i belive the plating laps to a better seal after more run time ...ps i used to work directly with sunnen hone company on new engine cylinder manufacture for cessnea aircraft and was a counsltant for some major rebuilders on honing
Kawasakinut:
stewart now i don't know what i want to do on my cylinder! yicks i'ma cornfused :| :| :|.
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