By Bronco boy
I recently purchased this bike about 3 months ago and have put about 30 hours on it. I have noticed that it has had a pretty considerable amount of valve noise, and I had issues starting at about 10 hours adjusted the valves and found the timing chain had jumped or been installed wrong so it was put back in time as well. It ran for approximately 10 minuits before jumping time again so it was put back in the shop and had a new tensioner and chain installed and haven’t had any issues since and it has preformed flawlessly, however the valves seam quite loud is there any reason to be concerned or are these valve trains just loud. (My first 450 as well so it may be a common thing among them and I may just not be used to it.)
thanks, bronco boy
Im planning on adding some power to my 15 rmz250. The idea so far is High compression piston(not super high still want the option to run 91oct), and hot cams, and full exhaust, and getting it re-tuned on dyno. Im just wondering if anyone has had success making these motors faster how they did it.
By Brock granberg
I just did my valve adjustments and put my YZ250f back together as far as the valves, shims buckets and cam covers on but I need adhesive for the plastic valve/cam cover and I am stumped as far as what to use and where to get it or even what to call it! Need to get some soon im in need of a ride!
I getting ready to tear into my 426 to freshen up the topend in to the bike I dont how many hours are on the topend or bottem end I a the 3rd ownner.
I was thinking about a 444 big bore kit what I dont like about it you cant over bore the cylinder again if something go's wrong down the road.
Is a High compressin piston worth it with the stock bore.
I want to have a good port job done on the head from a good know shop.
I already have hot cams in the motor I going to reuse so what kind of power should I get out of the bike.
I put a new cam chain when I installed the hot cams in the motor about 10 runing hours ago.
The bike has SS valves in it already the year 2000 came with them I have them checked and have the vavle seats lapped but they seem fine.