after everyone told me that i should go back and add the ram horns under my K&N filters, i whittled these out of an old filter box and installed them today. the car runs so much better, i have to admit. i thought they turned out neat. i also installed my new radiator today, which dropped the operating temps down considerably.

It's amazing what a little piece of tubing with a flare on it can do:classic:

Now all you need to do is fit some variable length trumpets which change the horn length for different rev ranges:rolleyes:

And how much would that set one back?

I believe the whole setup is FREE when you buy a 2007 Yamaha YZFR1 motorcycleLOLLOL

http://www.motorcycle-usa.com/Galleries_IndividualPhoto.aspx?Gallery=870&Main=11&Sub=19&Image=25833&PostBack=1&Media=1

turned out nice, but how much clearance do you have from the air horn to the air cleaner top?

turned out nice, but how much clearance do you have from the air horn to the air cleaner top?

Looks like he's got a decent amount of clearance. I've got those K&N filters on my car, too, although I used TWM velocity stacks.

The metal cover to the air filter can't come any closer to the horn than the bottom of the threads on that support rod. He looks like he might even have more clearance than I do......

i didn't put a tape measure to it, but it looked like an inch or so to me. if you look at the right stud that holds the top filter plate from the end of the threads to the tip of the air horn there is at least an inch.

i made a five hour drive going to a sales meeting in my z. the car ran great going down, but i had three plugs foul on the front carb coming back.

i had two extra plugs with me and a tool set that i packed just in case.

that got me to the next town and a parts store where i purchased four more plugs. the back carb plugs were fine, so i only needed one more.

any thoughts or suggestions on what to do so that i don't have that happen again? too rich maybe or???????

YWsounds like it could be a stuck jet, maybe? check all of your linkages and make sure they move smoothly. your nozzle could be sticking, too.

Pull the choke lever back and off, then press on the nozzle and see if it snaps up. If it is sticking down the carb will run vary rich. Also check the little fuel line for stiffness. If the fuel line is hardened from the heat , it can cause the nozzle to bind and stick down. Gary

after everyone told me that i should go back and add the ram horns under my K&N filters, i whittled these out of an old filter box and installed them today. the car runs so much better, i have to admit. i thought they turned out neat. i also installed my new radiator today, which dropped the operating temps down considerably.

Horns look really neat.

How hot were you running? Dropping operating temps below optimal will hamper performance...

thanks everyone for the help and compliments. it isn't very clear in the picture but i didn't like the vent line left open running back to the gas tank. we took a hose from that and routed it around the front of the valve cover and tapped into the carbuator vent hose with a tee. this was kinking the line thus shutting down the first three cylinders. i just rerouted the hose to get the kink out and now the car is fine. no more loading up like it is flooding on take off, or backfiring like before.

i maybe am not plumbing this correctly but so far it works great.

on a side note. the last three days i have been putting up with a rotten egg smell from under the hood. thought it was fumes from the little filter on the valve cover. turns out that the old battery was about to explode on me. a new one took care of that.

the temp gauge now sits about in the middle or slightly past right on the m, i guess we are good there.

one more update on all of this. it turns out the choke was sticking on the front carb. spraying wd 40 on the linkage and working the choke lever back and forth took care of that problem.

also, i noticed the new battery getting warm to the touch and emitting acid out the top.

i installed a new voltage regulator and checking the ground cable on the battery, found where it had never been tightened properly at the parts store when the battery was replaced.

i hope that i am done in the engine bay for now.