Suzuki gsxr 400 gk76a headers

[2deer]

Fitted new stainless steel headers form sandy bike spares ,runs really bad under 4000 rpm think it needs cabs set up or bigger pilot jets anyone help ?

[dsr91]

hi have same headers on mine , it ran better with sandys but standard can , once i fitted aftermarket can iv found that under 4rpm it judders and between 6-10 now its pops alot and have to slip clutch to get revs up so im gonna get mine set up on a dyno i think but have no idea how much its going to cost

[Marsbar]

I had 115 mains and needle on slot 2 but every bike is different and its just so much easyer if you have a local dyno, normally costs £25 for 3 runs.

[Variablevalves suck]

Fitted new stainless steel headers form sandy bike spares ,runs really bad under 4000 rpm think it needs cabs set up or bigger pilot jets anyone help ?

You will not need bigger pilots!
May need an adjustment to the needles.

[cdegk73a]

I had Sandybike Spares headers on my ZX7R, and spent time on the DYNO near me.. bought a Factory pro kit, and basically messed around for weeks.. burning cash and time like a lottery winner. After much searching and asking about, the general consensus was that i might as well have made the exhaust from McDonalds straws as SandyBikes headers are POOR copies of existing designs and will never flow correctly... I arranged to send them back, and got a refund.. Then bought a MOTAD.. fitted it and without altering ONE SETTING, ALL the midrange back, and perfect fuelling.. Sorry but in my Opinion and it is only MY opinion mind... they are crap.

[dsr91]

Not what you expect from a new exhaust ! , I found it improved mine but I noticed that on old pipe there used to be link pipes between between pipe 1and2 2and 3 etc but sandys ones have done away with that its just 4 pipes until it all links into 1, now I can only say there good but I have nothing to compare them to as that's all I could find for sale in uk , I'm taking bike to dyno setup Tuesday so hope it sorts out problems from adding a r6 stubby can

[thunderace]

I had Sandybike Spares headers on my ZX7R, and spent time on the DYNO near me.. bought a Factory pro kit, and basically messed around for weeks.. burning cash and time like a lottery winner. After much searching and asking about, the general consensus was that i might as well have made the exhaust from McDonalds straws as SandyBikes headers are POOR copies of existing designs and will never flow correctly... I arranged to send them back, and got a refund.. Then bought a MOTAD.. fitted it and without altering ONE SETTING, ALL the midrange back, and perfect fuelling.. Sorry but in my Opinion and it is only MY opinion mind... they are crap.

It's not the fault of Sandy. Their only real fault that is they still sell them. The manufacturer is Delkevic. Most of their stuff is OK but for some reason the headers make bikes run like shit

[dsr91]

O right I didn't know that !! Well that was the brand I got for the end can as well but it was cheap 120 for brand new stubby (road legal) but I'm stuck with headers now I've had them awhile , as long as I can ride the bike to dyno Tuesday (weather is not on bikers side ) I will put a follow up post but now I know bike is running lean

[Variablevalves suck]

Im sure Stripes ran one of these pipes and had no trouble.
Think it flowed a little better than stock so may have needed the needle lifting to richen the mid.
Im not 100% about this as the bike would have had other mods.

[cdegk73a]

I'm the first to admit that the zx7r is very susceptible to header changes, and that the GSXR400 may not be, but after a long talk with the guys at Motad, it appears that as said in a previous post, sandy bikes exhausts are "budget" copies of Delkavic exhausts, and do indeed run poorly on some bikes. I know this sounds like an add for Motad but they do have a Dyno on the premises, (I've seen it) and test all there systems to keep performance as it should be. shame that don't make systems for the GSXR400.. It may be possible to use a Dyno to tune out the flat spots on your bike, but i should image that without the balance pipes and unknown differences of say header length of the standard systems it's going to be difficult to get an even fuelling spread throughout the rev range. Even a system that looks the same on the outside, may be way off internally..