HELP on tuning my 400 H1

[scottc91]

ive not had my bike too long and dont know too much about them. just wondering what the first basic/cheapest/easiest things to do to my bike for a bit more umphh.

any thought would be appriciated cheers.

[Mori Man]

Full exhaust system (an end can will just give more noise) + jetting
Bigger carb's or flatslides
ZX-4 or SP cams

[cargo]

Go shopping and buy a 600 !

[scottc91]

cheers mate thought it would o bin summit along them lines but what are flatsides ??

[cameron]

Full exhaust system (an end can will just give more noise) + jetting
Bigger carb's or flatslides
ZX-4 or SP cams

How much difference do sp cams make? I imagine the standard one's are already fairly high lifting?

[jake]

id agree with cargo. If you want to tune a 400 to use on the road, you may aswell buy a 600 for the money you will spend.
i would leave the cams standard, deffo leave the flatslides alone, leave the airbox standard with the standard filter.
Look around and get a micron system or even better a swona. They both come up fairly often for around 150 - 200 quid.
get the thing healthy and fueling right and jobs a goodun.

[scottc91]

thanks for the advise guys. the only reason i havent bought a 600 is mainly because of insurance as i have only just turned 19 its quite high. what are flatsides ??

[cargo]

flatsides are a type of carburettor..........as fround on a particular model of ZXR400 they can with an engine tune and a decent exhaust along with careful set up give a power increase...................

I absolutly promise you the the best thing you can do with your ZXR400 is to run it with a good exhaust system and either a standard air filter or a K&N filter and have it well set up much as Kahe says....................tuning a ZXRis not cheap and it comes with a degree of unreliability.

A good idea would be to get the handling well sorted get a good rear shock and have your forks reworked.................far better to spend your money on suspension.

[scottc91]

ok guys ill take your advice thanks alot. as soon as ive sorted these bloody brakes out ill look into some susspension upgrades cheers