klx450 jetting?

[Daniel BakerMember]

G’day just wondering what jetting anyone out there with a klx450r is running. I put in the 48 pilot and 148 main and moved the clip down one position on the needle. I have removed the snorkel on the air box and removed the bung from the exhaust but other then that the bike is stock. I noticed a shit load more power from the lean stock settings but maybe i could go richer still? it is still running a bit hot. Anyway just curious as to what everyone has done…

[DeanMember]

It does sound like you are to lean, 148 ? F#$k me!! Go as rich as you can then work your way back a step at a time. I would hazard to guess that you should be around the 165-168 for your main. where are you riding? remember jetting is all about throttle position. The last 3rd is the main. hope this helps. Hey aron what are you running?

Ollie

[GregMember]

Yeah Ollie is right that sounds way to small, be careful that lean :ohmy: 160 + seems the go in the states from what I could find

TB

[Anonymous]

I didn’t know any of the 450’s ran a pilot anywhere near that small…..

Sure you didn’t mean 168?

[Daniel BakerMember]

yeh it is definitely 148. the stock settings are 45 pilot 145 main and the clip on the needle in the second from top position. In stock form and riding at around 1000m high it was still over heating after about 10 mins of slow first gear riding. i put in the 48 pilot and 148 main as they came in the spares kit, and also moved the clip down a notch. When i get the first major service done in about another 200kms when i get 1000kms up i might buy a JD kit and get it jetted properly. The guy i take it to has a dyno so he should get it pretty much spot on. I ride from sea level upto around 1200m too so pretty much everything our flat country has to offer. So i take it that no one else on here has a klx 450r?

[Anonymous]

If you haven’t already done so, look here for guidelines

http://www.thumpertalk.com/forum/forumdisplay.php?f=379

and do a search in the jetting forum here.

http://www.thumpertalk.com/forum/forumdisplay.php?f=64

[DeanMember]

Green450 wrote:

Quote:

So i take it that no one else on here has a klx 450r?

aarochild has a KLX450 but he is still trying to work out where the fuel screw is:laugh:

The JD jetting kit is a good investment I noticed the difference on my WR450 The crap aussie dollar has made them a tad expensive though now over $150:dry:

ollie

[Daniel BakerMember]

Thanks Ollie. Yeah the fuel screw is a bastard i dunno know if you would even get to it without taking off the carby. At that price it might just be easier to buy a few main jets at about 10 bucks each try them out.

[DeanMember]

Green450 wrote:

Quote:

Thanks Ollie. Yeah the fuel screw is a bastard i dunno know if you would even get to it without taking off the carby. At that price it might just be easier to buy a few main jets at about 10 bucks each try them out.

The best guys for jets that I found is ballards $8 ea I actually paid $23 for one at procycles Hornsby!:angry: another good thing to get while your there is the after market fuel screw about $25.The JD kit has very good needle jets that are already dynotuned. a needle from a shop here for your bike is about $45 so for the 2 jd needles and the 4 jets its still pretty reasonable.

Ballards do JD as well

ollie

[markMember]

the best jetting for the klx is 48pilot 162main drop the needle clip 1 position, also wire the accelerator pump and run the mixture screw at 2 1/2 turns out, change the leak jet to a 55 or 60 (this is the small jet in the float bowl) this is the jetting used by MSC Kawasaki Off-Road, the klx can go backwards if its to rich on the main so it can be a bit tricky to get it spot on! the MSC bikes run Barrett Exhaust with a Uni Filter.
hope this helps

[Mick DMember]

mark wrote:

Quote:

the best jetting for the klx is 48pilot 162main drop the needle clip 1 position, also wire the accelerator pump and run the mixture screw at 2 1/2 turns out, change the leak jet to a 55 or 60 (this is the small jet in the float bowl) this is the jetting used by MSC Kawasaki Off-Road, the klx can go backwards if its to rich on the main so it can be a bit tricky to get it spot on! the MSC bikes run Barrett Exhaust with a Uni Filter.
hope this helps

Well thought out informative first post there Mark,welcome to the site mate. Why not do an intro and tell us how you know all about the KLX.
Cheers
Mick

[Anonymous]

There you Dan you now some top jetting specs!

Welcome to the site Mark

[Daniel BakerMember]

yes, looks like i need to go for a larger main jet but maybe not that big as i only have the stock exhaust, maybe a 160 or 155. thanks for the info mate

[markMember]

use a 155 or 158 and go 2 and 1/4 turns out on with a standard exhaust, im sure would have already but make sure the exhuast baffle is pulled out, with this removed the pipe doesnt change the jetting very much.

cheers

[aaron childsMember]

Leave the bike in the shed for a couple of days……well months and look out more klx’s appear good stuff

IT WOULD HAVE TOOK THAT LONG TO FIND THE FUEL SCREW IF IT WASNT FOR OLLIE

Any how 158?….. its been that long, i know it WAS neer 160 although there is a t4 powercore and a powerbomb hedder to consider

I replaced the needle and will be searching for the specs for ya mate (wont hear the end of it if i get it wrong ey ollie ) only take a couple of days as we have recently moved.SHIT EVERYWHERE – on the up side i now have a 20 bike garage to work with! woohoo :woohoo:

Im looking for some info on the evap system i know they are on for emmisions sake but have herd roumors of restrictors within the pipe back to the airbox,then moe talk that they can be plugged?

Wich way to go plug or open? it seems to make more sence to me to open not to build up pressure……..what would i know? it took me weeks to install a fuel screw lol

[Author]

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