what piston are you running?

 

i really cant afford to make it louder maybe 4 db's, now if theres pipe that produces good bottom end power, isn't any longer than the stock pipe so i dont destroy it when the back end crashes down on the grab bar and is under $200 i would like to know about it, as for the total i spent on the quad:

running beat up 400ex -$1300

plastic and lights -$400

engine machining and parts -$900

chain/sprockets $120

handlebars $95

bumper $70

k&n filter + jet kit $80

prolly $300 more worth of odds-n-ends parts

im running an 11:1 piston

 

I would look for a White Bros E-seies slip on exhaust from ebay or something. You will still be legal, But you'll see more performance. Possibly on low end. If you don't notice a improvement on bottom end. Drop a tooth on your sprocket in the front "That is if you have stock gearing".

 

$189.99 the best bottom end pipe around is the HMF!!!

 

hmf claims they have a 91 db quiet core. however, i don't know what bike that is on. they are strong built pipes too.

 

420, i meant the piston company, not the compression, weisco has seen some problems with piston to deck clearences with the 89mm piston giving inacurate comprssion readings. I found out the hard way, my supposedly 11:1 is closer to 10 or less.

 

yeah, wiseco's pistons are really set up for the xr400's. so the compression ratios are wrong. that is why i suggest ross or je pistons.

 

unfortunately i bought a wiseco piston, are they really that bad?? now as for the E-series pipes: i have heard they are poorly built and often fall apart, also they stick out too far so i dont think im gonna go with the e-series, but i might consider the HMF pipe if its only 91 db's, do they stick out any farther than the stock pipe?

 

The hmf doesnt stick out farther than the grab bar. I have put mine on its end plenty of times with no damage, But, they are loud. I run the quiet core and there is NO WAY it meets the 91 db claim.

 

d@mn, looks like the only other option i have is maybe a new set of head pipes, would that help???