YZ 490

[bingil 6]

Okay all you Yamaha Gurus, Iv'e got a YZ 490 with a rear disc brake which to me looks like it's original ,what years & models did these bikes come fitted with rear discs? Cheers Lou

[vandy010]

yz490? or WR500?
the WR came with the rear disk as standard and is virtually the same bike. it's either the WR and your confused or someones done a conversion.

[bingil 6]

Someone could have dicked around with it, I bought it cheap a while ago and havn't gone near it since then but Iv'e always wondered what model it was, when I get home next I'll get the numbers off it to determine what it realy is, Thanks for the info Cheers

[Hoony]

could be a late model YZ490 as they went up to around 1987 "T" Model so it could be standard.

[lms6201]

all zy 490,s even up to the last one  in 1990 had drum rear , easy to tell if it,s a wr ,(disc,s)   with the 10gallon tank and usd forks and deltabox arm with snail cam axle  adjusters  , 82,j  83,k had angle exhaust port and single downtube frame , 84 on center ex port and wishbone cradle , front disc from 85 i think     

[bingil 6]

Finaly got some time so here's the Frame # 1LV-000660, Engine # 5L5-000007, & It does'nt have snail cam adjusters Cheers

[caps 999]

according to y-pic the frame is 86 yz490 and the engine is pre production 81 it465 its telling me the engines started at  5L5-000101