ISO :- early 80's YZM500 pic's

[Hoony]

I have the poster you are talking about somewhere down in the garage , YZM500 aircooled powervalved , will try to find it

 any luck with finding this ?

[Hoony]

found it...dont ask me what issue it is cause the covers been ripped off so i will give you a few details on what adb says about it before i try and have a go at scanning it for you all....so here goes.....leif perssons works yzm500 yamaha.the engine is still aircooled but is more than a match for the water pumpers in the hands of hakan carlqvist.sand cast cases,power valve,round slide carb and radically shaped pipe.factory ohlins front and back with hand made aluminium swingarm.hubs are magnesium...and get this this is strange,disk on the front drum rear.......now ill try and scan this and put it on .....might have to get the misses to help....    

any luck with scans ?

[Husky500evo]

I have pictures of Carlqvist's & Leif Perssons YZM500s in my computer, but I don't know how to reduce them down below 128kb so I can post them. Any tips ? They are both air cooled , with a variable exhaust port & an exhaust pipe that also acts as an air scoop to direct air on to the top end.

[Hoony]

I have pictures of Carlqvist's & Leif Perssons YZM500s in my computer, but I don't know how to reduce them down below 128kb so I can post them. Any tips ? They are both air cooled , with a variable exhaust port & an exhaust pipe that also acts as an air scoop to direct air on to the top end.

Husky500Evo,

i have  sent Email to you.

[paul]

can you email them here  and i will see what i can do  paul@pftrees.com.au

[VMX Andrew]

ive got the same problem too.... cant reduce the size to the 128kb limit....

[paul]

some time if you email to you self you computer will auto resize them   ,save it to a folder  then do the photo bucket thing

[VMX Andrew]

finally here it is boys.....

[attachment deleted by admin]

[Hoony]

ive got the same problem too.... cant reduce the size to the 128kb limit....

Andrew, can you send them to me as they are directly please. hoony@bigpond.net.au

[GMC]

I'll assume it's a KIPS and you I learn everyday.
Any pics Geoff?

Here you go Lozza, I finally found my old manual.

[evo550]

Yamaha had been running powervalves on their works 500's as early as '81........as featured in VMX a while ago with Gally's ow51.

[Lozza]

Interesting!!!
What actuates the valve?Exhaust gas pressure or is there a rod from a governor off the crankshaft?

[LWC82PE]

im glad someone mentioned Galls OW51. i knew i must of been right thinking that there was a powervalve yamaha back that early.