does anyone know the part numbers for the camshaft journal caps? not listed on alpha sports and ronayers parts fiche?
cheers
Ant.

I believe they are machined while assembled on the head, so if you need to replace them, you need to get a whole head+caps, ie. they're not interchangeable.

Did you look at partforyamaha.com?

http://www.partforyamaha.com/pages/parts/viewbybrand/1/50/25835/1050/default.aspx

Thats the OEM veiw for the cylinder head.

Why do you need caps, you run the cams in the old head with the old sprockets ... But yea they are align bored in place in the head so its 1 part ...
Cool.
Buddha.

i did think asmuch but wanted to clarify it.
the reason is, only that i need 1 tapped and hellicoiled  as the thread for the valve cover is buggered on one of them.
was just going to way-up what was the cheaper option-,replacement or repair.
thanks for the input guys.

Tap and heli coil - if you sent it to me it be 10 bucks. In fact I used up a whole 2 dozen of them and just bought a 50 baggie few weeks ago. Of course its prolly just as easy/cheap doing it yourself.

BTW helicoil uses a non standard tap and a high tension steel wire to hold the threads in. Its pretty sound but it needs a heli coil specific tap. There is another one (cant remember the name of it right off hand, I could call my machine tool guy to be sure) that uses a proper bolt on the outside and the right threads inside.

Like 7mm .8 pitch (which I believe is the right one for the cap) will be 5/16 bolt and your 7mm .8 inside. There is a slot in that thing and you install it with a wide screwdriver. It holds on with loctite which IMHO is not as good as the heli coil's spring steel tension, but you're never going to feel any different once its in there.

Dude, all this cool crap is in england, we cry everythign we need to get metric sheite.

Cool.
Buddha.

  get Obama to bring your country into the 21st century Srinath

cheers for the advise below bud,i'l have to have a look into the other procedure you mention below,wasnt aware of it 
Ant.

Quote from: The Buddha on October 28, 2009, 07:01:33 AM
Tap and heli coil - if you sent it to me it be 10 bucks. In fact I used up a whole 2 dozen of them and just bought a 50 baggie few weeks ago. Of course its prolly just as easy/cheap doing it yourself.

BTW helicoil uses a non standard tap and a high tension steel wire to hold the threads in. Its pretty sound but it needs a heli coil specific tap. There is another one (cant remember the name of it right off hand, I could call my machine tool guy to be sure) that uses a proper bolt on the outside and the right threads inside.

Like 7mm .8 pitch (which I believe is the right one for the cap) will be 5/16 bolt and your 7mm .8 inside. There is a slot in that thing and you install it with a wide screwdriver. It holds on with loctite which IMHO is not as good as the heli coil's spring steel tension, but you're never going to feel any different once its in there.

Dude, all this cool crap is in england, we cry everythign we need to get metric sheite.

Cool.
Buddha.

Quote from: gs500Ant on October 28, 2009, 08:01:23 AM
get Obama to bring your country into the 21st century Srinath

cheers for the advise below bud,i'l have to have a look into the other procedure you mention below,wasnt aware of it 
Ant.

Oh yea ... For your information we are thrilled with making everythign in the 16th's and if you're wanting more accurate then we have the 32'nd and when we say stuff in the thousandths we really know how many 32'nds that is and that's all there is to it.

What ... 500 cc so what is that in inches. ...  ... OK then. I'll give you this 4 inch piston and you put in the bike. OK.
Cool.
Buddha.