"detuning" KDX220

[ArcherWC]

Well it would be slower, but he would also have the problem of it breaking all the time.

hahahaha....that is SO rich coming from you

[cheese]

LOL it was more of a dig at Suzuki than anything.

Jeremys bike is in good order and runs well.

[F5 Dave]

What is the pipe? Most will be aimed at better overall performance, some at midrange. No one will make an MX pipe for a kdx. Stock pipe on 220 esp known for being crud & super heavy to boot.

Strongly suspect that jetting is so rich that it just bogs real bad until finally it is spinning enough to burn through the rich mixture. My kdx was so badly jetted it felt like that when I got it.

Have a look at the justkdx website, lot of good info there & jetting is a good starting point (well was on my 89). Never ever fouled a plug thereafter.

[Buddy L]

Strongly suspect that jetting is so rich that it just bogs real bad until finally it is spinning enough to burn through the rich mixture. My kdx was so badly jetted it felt like that when I got it.

.

I had a 1997 KDX 220 (jap import steel tank)
and it was also badly jetted, would bog real bad and had to slowly wined on the trottle to go anywhere or it would coff and splutter.
ended up going down 3 sizes in the jetting (can't remember the the number sizing sorry)
and transfromed the bike. crisp and smooth off the bottom and ran clean as well.
Also had the standard pipe on the bike.

[FROSTY:Me]

I went back up to mangawai yesterday. I've come to the conclusion that the problem isn't the KDX its the Kind of riding I'm trying to do on it. The track(s) I've created are deliberately very tight so the boys aren't able to get up to even full speed on their 80"s.
I took the KDX to the "other side" of the forest and marked out a 2km track for myself. Heaps better and the bike feels much happier.

[marks]

I went back up to mangawai yesterday. I've come to the conclusion that the problem isn't the KDX its the Kind of riding I'm trying to do on it. The track(s) I've created are deliberately very tight so the boys aren't able to get up to even full speed on their 80"s.
I took the KDX to the "other side" of the forest and marked out a 2km track for myself. Heaps better and the bike feels much happier.

what oil ratio do you run?

We use my sons KDX in really tight stuff and it gets "boggier" as the day progresses - doesn't foul the plug - just gets unhappy and wont idle for long etc. We run synthetic oil at 32 to 1 which I suspect is too rich. It may have got worse since we stuck a stocking over the top of the derestricted airbox.

[FROSTY:Me]

On advice Im running 50/1 for this stuff.

[Reckless]

flywheel weight?

Yep that gets my vote as well best $100-00 odd, anyone can spend on a 2 smoker!!

[cheese]

Ring the Tjebbe

[dammad1]

what oil ratio do you run?

We use my sons KDX in really tight stuff and it gets "boggier" as the day progresses - doesn't foul the plug - just gets unhappy and wont idle for long etc. We run synthetic oil at 32 to 1 which I suspect is too rich. It may have got worse since we stuck a stocking over the top of the derestricted airbox.

I ran 32:1 on my old KDX and never had any problems, if the plug is getting a bit dirty then you may just need to lean it off slightly.

[quallman1234]

I run 30 to 1, In my KDX 200 03'. Seems fine. Only problems i have is if i drop it, its a bitch to get started again. But thats nothing to do with the oil/fuel ratio!

Then again i am pretty much thrashing the whole time nowadays!

[Taz]

flywheel weight?

Unlike a MX bike the KDX does not need anymore weight on the flywheel.
Great bikes for trail riding.

[F5 Dave]

Yeah, don't confuse oil ratio with Petrol to air ratio.

However putting in less oil will make it slightly richer.

I wouldn't go less than 40:1. Kawasaki's electrofusion isn't as robust as other manufacturers.

A properly jetted kdx will potter around for ages without fouling up.

[NordieBoy]

Unlike a MX bike the KDX does not need anymore weight on the flywheel.
Great bikes for trail riding.

If any bike feels peaky then wouldn't a flywheel weight help?

[F5 Dave]

Enduro bikes have much larger flywheels than MX bikes so there is no where as much to gain. However on the KDX websites some owners swear by adding weights to kdxs. Preference I guess.