i was wondering if any of you have a hmf slip on for your z400 and if its any good... i was thinking about getting one becuase of the nice price but not sure about thier performance... thanks!

 

I have the HMF (full system) and I love it,performance is great.Duno what the slip on will be like though.

 

how does it sound? is on more on the louder side or not so loud?

 

All aftermarkets are loud... the pipe shootout db numbers are way off... the PC t4 was rated at 95db, and that's not even close. The quietest you'll find are the FMF q Series and the PC 496... I just got the 496 and couldn't be happier with the noise level and power increase.

Even Sparks is coming out with a quiet pipe. Nice to see manufacturer's playing their part in helping to save our sport.

 

The HMF is loud.I think its the 3rd loudest 4-stroke atv pipe.Its a real deep and meaty soud on the bottom end and on the top its real crisp.

 

does hmf only make 1 type of pipe for z400.... i know there are different colors but are there different pipes?

 

No just the full system or the slip on.

http://www.hmfengineering.com/

 

The slip on is well worth the money. We have one.. A full system is better..

 

I took SPL reading for a PC T4 slip-on on a 400ex. The measurements are taken 45 degrees off axis from the pipe at around 20" away.

At idle, it was ~95 dBa
At 1/2 throttle it was 108 dBa (115 dBc)

 

If your engine is mainly stock, a slip-on is a waste of money.

What does the "yoshimura titanium pipe" in your signature mean? Did you just replace the head pipe?

Also, if you haven't opened up the intake (take the noise baffle off the snorkel or take off the airbox lid) you're missing a lot of easily obtained power.