KX Riders

Maintenance & Technical => KX500 Original => Topic started by: Borntworide on March 11, 2020, 02:04:57 PM

Title: Cylinder head question
Post by: Borntworide on March 11, 2020, 02:04:57 PM

I am looking for a spare cylinder head for my 90-91 K5, there are 3 on eBay now. In the pictures provide in the listing, they appear to be all different weights? Can some shed some light on this?

Title: Re: Cylinder head question
Post by: sandblaster on March 11, 2020, 03:02:16 PM

I found 5 that would fit.
3 I would consider.
These first two I would pass on unless I was going to re-cut them.

This one is beat bad and needs to be re-cut.
https://www.ebay.com/itm/1990-KAWASAKI-KX500-CYINDER-HEAD-DOME-TOPEND-TOP-END-ASSY-KX-500/264630400596?hash=item3d9d337654%3Ag%3Aoo4AAOSwpz9eQgAt&LH_ItemCondition=4 (https://www.ebay.com/itm/1990-KAWASAKI-KX500-CYINDER-HEAD-DOME-TOPEND-TOP-END-ASSY-KX-500/264630400596?hash=item3d9d337654%3Ag%3Aoo4AAOSwpz9eQgAt&LH_ItemCondition=4)

This one is dinked up and should also be re-cut
https://www.ebay.com/itm/Kawasaki-MX-KX500-Cylinder-Head-3-1616/153854663742?hash=item23d273dc3e%3Ag%3AEkcAAOSwXeteH46F&LH_ItemCondition=4 (https://www.ebay.com/itm/Kawasaki-MX-KX500-Cylinder-Head-3-1616/153854663742?hash=item23d273dc3e%3Ag%3AEkcAAOSwXeteH46F&LH_ItemCondition=4)

This one is polished externally and likely has been shaved for higher compression which is likely the weight difference.
https://www.ebay.com/itm/Kawasaki-MX-KX500-Cylinder-Head-1-1616/372976325342?hash=item56d71f12de%3Ag%3AB3EAAOSwVjheH440&LH_ItemCondition=4 (https://www.ebay.com/itm/Kawasaki-MX-KX500-Cylinder-Head-1-1616/372976325342?hash=item56d71f12de%3Ag%3AB3EAAOSwVjheH440&LH_ItemCondition=4)

This one has also likely been shaved for higher compression which again would be shown in the weight difference:
https://www.ebay.com/itm/Kawasaki-MX-KX500-Cylinder-Head-3-1616/153854663742?hash=item23d273dc3e%3Ag%3AEkcAAOSwXeteH46F&LH_ItemCondition=4 (https://www.ebay.com/itm/Kawasaki-MX-KX500-Cylinder-Head-3-1616/153854663742?hash=item23d273dc3e%3Ag%3AEkcAAOSwXeteH46F&LH_ItemCondition=4)

This one weighs the most and is likely not shaved or is shaved the least.
https://www.ebay.com/itm/Kawasaki-MX-KX500-Cylinder-Head-4-1616/174211526251?hash=item288fd0ee6b%3Ag%3AFl0AAOSwPw5eH46z&LH_ItemCondition=4 (https://www.ebay.com/itm/Kawasaki-MX-KX500-Cylinder-Head-4-1616/174211526251?hash=item288fd0ee6b%3Ag%3AFl0AAOSwPw5eH46z&LH_ItemCondition=4)

Title: Re: Cylinder head question
Post by: Borntworide on March 12, 2020, 04:52:40 AM

Thank you!   I should have mentioned that I wanted a spare head to get a decompression installed,  Any rough est on how much machining on the head would cost?  those heads prices range from $119 vs $150

Title: Re: Cylinder head question
Post by: sandblaster on March 12, 2020, 04:11:13 PM

Ask Larry Wiechman or Tom at Tom Morgan Racing.