2008年11月12日 · The YZ490 that Broc Glover rode in 85 was really close to a stock bike.He beat Dave Bailey on the trickest works Honda ever produced in the history of motocross.Glover is …

2022年8月20日 · That info is for an 1982 yz490. Assuming the 490 in your picture is your then you have a 1987 and up 490. The 82 had a left side pipe and it was switched later on to a right …

2011年1月18日 · Myself, I always believed that Super Hunky (Rick Sieman, former editor of Dirt Bike magazine) was so hung-up on the first year YZ-490, the 1982 YZ-490J, that he put them …

2013年2月23日 · My 1985 YZ490, now a 510cc was red and white new. I got this one done last year. motor balanced. Race Tech Gold valves, frame cut/ pulled back 0.03degs more than the …

2016年11月28日 · My 1985 YZ490/545 is a 38MM Mikuni off a 1982 YZ490 Bored Out to a true 38MM (Dial a Jet) sprayer for wide open throttle . 3.0 slid (cut 3mm off the face) 6 fj14 needle …

2014年5月27日 · I was wondering if anyone on here has experience jetting the 82-83 yz 490's. I just got done rebuilding my IT 465 with a YZ 490 top end. Jetting wise I'm running a 45 pilot, …

2013年11月13日 · Head mod is the first thing to do, and then get the jetting sorted out. After that, about the only complaint for the YZ490 is the vibration. Unfortunately that is not a simple, …

2008年9月17日 · I have a 1984 YZ490 that I've had good luck with after I had the head reworked and lowered the compression etc. Well, I just broke an engine case and I would like to know if …

2011年1月18日 · I've heard of guys shaving the deck height on the 490 head.. something about getting the combustion chamber dome to 30 degrees. It supposed to take care of early …

2009年4月8日 · I am possibly getting this 1987 Yamaha YZ490. I don't know much about this model, is it a collectable bike? What do you think I should pay for it? The owner says the top …