Rebuilding 426

7 replies to this topic
  • Clutchup

Posted May 24, 2015 - 01:43 PM


Whats up guys finally got my wr gears in my yz and also put a new piston and just today it randomly seized on me so im thinking the piston is shot and cylinder. Where is the cheapest place to buy a new cylinder? I checked thumpertalk and it was like $500? I check another website and was $250. Anyone know of a good site with the lowest prices? Btw i did not get my cyclinder re plated when i put the bew piston in could that of caused a seize? Once it cools down the seize gets loose and i can start again then will run then lock up again and cant kick threw.

  • Clutchup

Posted May 25, 2015 - 07:07 PM


ok ripped the motor apart and I think the connecting rod roller bearing went bad causing the pistion to hit the walls. well I made a video to show you guys and tell me what should I do I seen connecting rod rebuild kits should I do that or can I just get a new bearing?


https://www.dropbox.... 54

  • grayracer513

Posted May 26, 2015 - 06:46 AM


Either buy the rod, bearing, and crank pin, send to a shop for a rebuild, or buy a complete new crank.  The money is close to the same either way.

  • Clutchup

Posted May 26, 2015 - 08:08 AM


Gray racer when i buy a new jug is the cylinder ready to go plated and hatched? What are good low price websites to buy oem parts i seen the price for a jug from $300 to $288

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  • grayracer513

Posted May 26, 2015 - 08:57 AM


New cylinders are ready to use.  Yours can probably be replated for less than the price of new.

  • Clutchup

Posted May 26, 2015 - 09:22 AM


Yeah mine got chewed up tho pretty deep scratches

  • grayracer513

Posted May 26, 2015 - 09:27 AM


Can still be refinished, nevertheless.  Contact Millennium Technologies. 

  • Clutchup

Posted May 26, 2015 - 02:16 PM


Im just gona go new and replace all thanks for the help

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