FZR1000 | Forum profile

I wouldn't wrap headers unless it was a full-pump motor (I'm talking carbs/cams/valve springs etc) or you had a mid/late 80's sportbike with overheating/in-town leg-heat or a newer bike with underseat exhaust, but by then it's not really a header then is it? The only way you cold come close to getting your low/mid-end back is restriction in the can- a large washer to choke the size down placed right before the can but...

QUOTE (Brittus @ Dec 25 2009, 06:54 PM) Wrapping the headers greatly effects jetting... speeds up exhaust gasses which helps evacuate during overlap... increases top-end power in most cases when jetted accordingly. Shorter muffler decrease backpressure of exiting exhaust gasses and you lose lower-end torque... Brittus 75% of what I've read online give exhaust wrap on bikes a thumbs down. many say that wrapping on a...

This is my first 4 stroke engine im rebuilding. I have taken apart and build 2-stroke racing engines, but thats the extent of my motor history. Over the summer, in September to be exact, my motor all of a sudden started making a loud ticking noise. It sounded like something moving around in the engine, but im not sure. Could have been a knock. So far, i have the heads off. including the cams and obviously the valve covers. but i have run into...

I understand cutting down the muffler because it's damaged, but why are you messing with the pipe after the exup? You're jetting will be fine.

*Bump!* I was reminded about the steel tube thingy again, anyone have a clue what it is?