OzVMX Forum

Clubroom => Tech Talk => Topic started by: mposs on March 18, 2011, 08:41:37 pm

Title: 1974 Yamaha MX250 Timing
Post by: mposs on March 18, 2011, 08:41:37 pm

Hi,
     Can someone please point me in the right direction for setting the timing on a MX250 with standard ignition components?

(http://i574.photobucket.com/albums/ss185/mposs/Millard10Van002.jpg)

Cheers Mark

Title: Re: 1974 Yamaha MX250 Timing
Post by: vandy010 on March 18, 2011, 09:01:46 pm

Jam a dial indicator down the spark plug hole & rotate crank until the piston crown is 2.4mm Before Top Dead Centre (BTDC) then align the two timing marks shown in your pic. That should be pretty right ;)

Title: Re: 1974 Yamaha MX250 Timing
Post by: mposs on March 18, 2011, 09:19:24 pm

Thanks Vandy. I knew someone on here would know. Cheers Mark

Title: Re: 1974 Yamaha MX250 Timing
Post by: Freakshow on March 23, 2011, 03:42:22 pm

YEp how easy is that !  if your real lasy and just wanna see if it runs shove somthing in the head that point out, find the point it hits highest spot mark it and cam back a poof tenth. ( couple a mm in tech terms)

and if it dont run you got other issues   ;D

Title: Re: 1974 Yamaha MX250 Timing
Post by: mposs on March 27, 2011, 09:07:57 pm

She's a runner. Thanks Gentlemen.

Title: Re: 1974 Yamaha MX250 Timing
Post by: vandy010 on March 27, 2011, 10:39:36 pm

Quote from: mposs on March 27, 2011, 09:07:57 pm

She's a runner. Thanks Gentlemen.

supercool 8)
they're a really neat work truck the MX250,
mine's stock with a DT piston and i love it.
have fun :)