[snow pro f7]

I have a 2005 zr 900 carb and I have purchased a slp single pipe with there clutch kit to match with the boyesen rad valves and I bought a speedwerx head recomended for 0-3000 ft .Does anyone know if I would have problems with the speedwerx head for exsample dentination.I hope this will be a good reliable package for me.Any info would be great thank you.

 

[catpunk]

had one on my 800 and had no probs. Increased throttle response.

 

[turtleheadking]

[attachment=93273:attachment]Got one on my 03 900. No problems yet.

 

[snow pro f7]

thank you for the info guys

 

[snow pro f7]

Does anyone know how much more the speedwerx head that is recomended from 0-3000 feet will bump up the compresion from a stock zr 900,and what is the stock compresion.-Thanks-

 

[sleddinfool]

Not sure on compression. I have the speedwerx heads and single pipe on my sled. Along with CPR's clutching, v-force 2's a D&D power breather. The sled runs very well, I did lose a piston my second winter with the sled. I held it wide open for well over a mile and coughed a piston. I could not figure out why until about fifteen minutes later. It was my first ride of the year (could not wait to go out) I had dumped the gas I had at the cabin for the tractor into the sled. It was only 87 octane. I was told to use 91 or higher if at all possible, if I had to use 87 no long WOT runs. Moral of story use high octane gas. Kevin