OzVMX Forum

Marque Remarks => Yamaha => Topic started by: Ekka on June 10, 2015, 09:07:34 pm

Title: Re: YZ 250 L powervalve mods
Post by: Ekka on June 10, 2015, 09:07:34 pm

Just put a power valve push rod that I had repaired and it appears to been modified in a way that it opens the valve slightly. Now the part that was repaired has nothing too do with this affect . Now was this some sort of a mod back in the day

Title: Re: YZ 250 L powervalve mods
Post by: alexbrown64 on June 11, 2015, 10:44:11 am

I just had a look at the Tech Report for the 250L and there is no mention of a mod.  "Another tip which you may remember from the 80s - the YZ250 power-valve retaining clip (shaped a bit like a Y) is prone to snapping. Replace it with an old 520 chain link plate, the figure of 8 which will fit perfectly, has the correct size hole for the screw and will never snap".. http://forums.mxtrax.co.uk/showthread.php/343559-1984-Yamaha-YZ250L-Restoration-begins-!/page3

Title: Re: YZ 250 L powervalve mods
Post by: Ekka on June 15, 2015, 08:26:50 pm

Rode the yz on Saturday with that mod f@#k me it's like a light switch