yz 490 cylinder / head compatability

[lms6201]

 i have a k barrell with a j head , seems overcompressed , is there any issues with head / barrell combo,s here ? 

[Grunter215]

I'd be interested to know aswell. I got 84 490 (no head) so whats going to fit? Are they interchangable(both YZ and IT) .... someones gotta know something???

[Rubber neck]

The best thing you both could do with the 490 bits,is take it to a scrap metal yard and dispose of them once and for all,they are the biggest pile of shit of a motorbike ever invented,go and buy a 85 cr 500 then you will see what i mean...Rubber neck..

[lms6201]

why would u want to take a shot at me ??  i legitimatly asked for a pic of the maico , unused bikes exist , a nos 480 cr went up your way , from here in fact , pls don,t suck me into any of this online back stabbing , i have seen too often on forum sites ,

[Husky500evo]

Kiwi 64, I am not an expert on Yamahas but I think that the '84 (L) & later 490s have 7 cylinder head studs , where the earlier models only had 6 .The cylinders also have a centre port exhaust from '84 on .I just sold a head & cylinder off a IT490L a few days ago . The guy who bought them only needed the cylinder . So I can try & find his number & see if he wants to sell the head , if you are interested.

[TonyB]

mmm this rubber neck dork smells like the Fried Pomeranian idiot we had the misfortune of crossing paths with??