[jonasx2]

Hi, please take a look at how my used yamaha fz1 came with, the seller removed a yoshimura exhaust and did that thing showed in this picture, it sounded just stable, until I moved some of those bended metal things trying to open a major air flow in that tube, after my touch, the exhaust make lots of explosions and, oh yeah this is a good description, it sounds almost good but theres a continuos sound that looks like if you were playing with a bicycle weel, and your nails touching those rods around the axl :sad:, the pattern goes faster when accelerating. Did the engine lose pressure or something? the bike runs fast and aggresive, just plus the new gas explosions and that tic-tic-tic sound, I dont remember how exactly those blocking element were, im planning try it to leave it just like before, it may vary a little since the metal things did no get the very same state, will I need to go trial and error?

 

[jonasx2]

Eh... I was outside a seven eleven and realized the noise was coming from just behind the radiator, I later confirmed my doubt looking at those engine valve ports that have caps, seeing one was missing, fortunately there remained some part of the cap, so I had the chance to improvise a blocking thing, I used aluminum that I got from a soda can, its obviously is not completely sealed, but works just ok, I was limited to certain materials since there got incredible melting hot hehe. Will see later how to get some caps, the noise is still there, much more dimized, only a sealed cap will obviously work perfect.