2002 KDX220 - Puking Up A Little Spooge

[stnd]

Hi, recently I have gone out on some rides which are maybe a little too advanced for me and I lug the bike around in first or second on single track. After a long day it looks like my bike pukes out the exhaust port onto the pipe a bit. To me it's not excessive but I would still like to get it taken care of. I think this happens when I ride it in 2nd for a while and then revi t to 'clear it out' as someone told me to do. The spark plug never fouls and the bike runs great. At least I think that.

I am going to take off the pipe when I get a chance and check the condition of the o rings and metal gasket, but wanted to check here as well for any advice.

Pictures of spooge



Video of my slow riding

[bufftester]

Looks like you need to do some jetting work

[SS109]

That's very common for a bike that has bad o-rings and/or a bent head pipe.

[KDXGarage]

Check out the parts diagram.

Possible causes are as SS109 mentioned.

worn o-rings
worn copper crush gasket

ALSO: bent pipe, causing improper mounting angle

ALSO: steel pipe will wear out the aluminum mounting area if allowed to go unchecked for a long time

glob of silicone is a common repair attempt when the area is damaged



Just for the record, one drop is too much. The bike has an issue. Good job to inquire about it.

[stnd]

Thanks everyone. I will inspect and order parts as needed. Hope the pipe is not bent, not really prepared to deal with that. I always wonder how the pipe stays mounted properly between the top and bottom of rear compression stroke range.

[bufftester]

Keep in mind that until you fix your spooge issue, sealing the pipe to the head just means that oil is going to be deposited in the expansion chamber/silencer, so it may look like your problem is solved for a bit, until the pipe starts spitting it out the back (or more frequently out the union between the pipe and silencer).

[oldmankdx69]

Don't forget the springs. Not very expensive. They do get old and stretched. Sorta like some KDX riders!!!

[KDXGarage]

Yes, get new springs, too. Good idea!

[stnd]

For now I will be ordering new o rings, copper washer, and springs i guess although they seem good to me, and have added some hi temp permatex over the current orings in the mean time.

I like riding in second, but maybe i'm not at that speed yet and need to run first to stay in the powerband. I may try opening the air screw when putting around like that and see how that goes.

[doakley]

It's not the gear you're in or the air screw. You should go through the jetting guide in these forums. That's a lotta' puke coming out.

[KDXGarage]

Yep, not the riding style

[stnd]

It's not the gear you're in or the air screw. You should go through the jetting guide in these forums. That's a lotta' puke coming out.

Goal was to go through that guide the first time i do a rebuild since that is one of the first instructions. I have the RB Carb and went a size down on pilot clip and main from how it came with the recommended settings from Ron for my mods and elevation.