OzVMX Forum
Clubroom => General Discussion => Topic started by: Hoony on September 15, 2007, 08:39:04 am
-
i have been trolling the net unsuccessfully loking for an early 80's pic of a Yamaha YZM500 works bike aircooled with a power valve, i saw a poster of this in a dealer many years ago and cannot believe i cannot find another pic of it. Anyone seen one?
-
To my knowledge there hasn't been a production/works air cooled engine with a power valve (but we maybe making one soon but shhhhhhhh).Considering the YZ 125 had water and a PV in 82???When did the 500 get water?
http://ozvmx.com/community/index.php?topic=298.0
-
G'day Lozza, there was a works only water cooled YZM 500 around 88' never made it into production though.
-
To my knowledge there hasn't been a production/works air cooled engine with a power valve
The 86 KDX 200 was air cooled with a power valve, bloody great motor too.
-
I'll assume it's a KIPS and you I learn everyday.
Any pics Geoff????
-
adb had a close up pic in an 1985 issue of a works aircooled power valved model factory yz500.....
-
Well done Andrew i don't suppose you have that issue? good memory you have.
Anyone got 1985 issues of ABD they can check out ?
-
I have the poster you are talking about somewhere down in the garage , YZM500 aircooled powervalved , will try to find it
-
Well done geraldo, now if only you can scan it?
as a matter of interest what year is it?
-
Are you thinking of Carlas YZ? The one with the funny shaped expansion pipe to dierct air onto the cylinder?
-
Hmm not sure TooFast ? have not seen that one and it must be different.
the one i mean is a YZM500 aircolled with a Power valve.
-
i might have to go out to the shed an find that issue of adb to settle everything...but ive never scanned anything before....
-
Nah, don't sweat it Andrew, do it when you get time mate.
-
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.... ;D
-
I'm pretty sure it had a powervalve. If it's the one I'm thinking about Carlqvist had some choice words to say about about it.
Andrew, sounds like you hit gold there.
-
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 ?
-
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.... ;D
any luck with scans ?
-
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.
-
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.
-
can you email them here and i will see what i can do [email protected]
-
ive got the same problem too.... cant reduce the size to the 128kb limit.... ???
-
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
-
(http://)finally here it is boys.....
[attachment deleted by admin]
-
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. [email protected]
-
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.
(http://i15.photobucket.com/albums/a393/gmcloa/KDX200.jpg)
-
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.
-
Interesting!!!
What actuates the valve?Exhaust gas pressure or is there a rod from a governor off the crankshaft?
-
im glad someone mentioned Galls OW51. i knew i must of been right thinking that there was a powervalve yamaha back that early.