err! tuning my carbs..

[kaymoto]

so my kat6 has KEI*HIN carbs from a kawasaki ninja.. and I'm not familiar with bike carb tuning. my prob is the local suzuki shop WONT work on the bike without the original carbs on it. soo I will be tuning them myself. I've allready pulled them apart and given them a good cleaning. everything looked good so back on they went. it starts and idles fine, revs all the way through the rpm range without any hesitation. but when I run it down the road from about 3500 and up it bogs down horribly..? so would this be too much fuel or not enough? right now I have the air fuel set at 2.25 turns out.. any info would help -thanks

[scottynoface]

Is the jetting stock? If not, it sounds like a needle height issue.

http://www.factorypro.com/tech_tuning_procedures/tuning_carbtune,CV,high_rpm_engines.html

[kaymoto]

okay I checked out that link, how do I adjust the needle height? is it just by adding spacers to the needle up top?

[arsenic]

why don't you just buy the right carbs

[kaymoto]

i'd like to, but I dont have the extra cash to shell out for em right now or any time soon. I plan on buyin the correct setup for next season, but for now I have to use the ones I have. so any tuning suggestions would be nice..

[md86]

okay I checked out that link, how do I adjust the needle height? is it just by adding spacers to the needle up top?

UNDER the needle .

[Kreylyn]

In general if the hesitation is lower rpms say... 4-5k.... your running a little lean and need to shim (put a washer) under the needle. If your fine there, but running into issues higher rpms say... 7-9k, then it's a little rich, and you would need to lower the needle (remove shims, move eclip if you have one on it up higher).

If it's running poorly through all of the rpms over 3k, your mains may be off pretty badly.

Krey

[kaymoto]

okay I'll start messin with it again tomorrow, I've been waiting for a day without rain.. idaho weather sucks soo bad. I did run it around for the bit of decent weather today and it was great until it warmed up good. then it started to struggle again between 4k and 6k.. I'll try spacing the needle to sit a bit higher first and go from there.

when it's fully warmed it idles a bit higher also. around 2600rpm as compared to 1200rpm when cold??

[kaymoto]

so after a couple of hours of fumbling around with my bike today I caved and call my uncle scott to HELP! he's thinkin it's just a too restrictive filter because it looks new but when it on the bike runs like crap. so right now Im runnin some old school velocity stacks until I get my K&N filters in. with it runnin screens only it screams! as soon as the filters come in and are on I'll post and let ya'll know how it runs.. i'm gonna make a new post, were not sure the bike has the original motor, I'll explain in the post.. take a look if ya think you can help -thanks

[Chuck in Austin]

Uh oh... here it comes...

[Kreylyn]

Uh oh... here it comes...

He's not running Kat carbs...

Krey

[kaymoto]

nope there ninja carbs. and not to slam on kei*hin carbs, but there garbage! I feel bad for anyone who owns a ninja.

[ITS_NOT_A_KNIFE]

nope there ninja carbs. and not to slam on kei*hin carbs, but there garbage! I feel bad for anyone who owns a ninja.

[ct3]

nice progress mate