Your Keihin PWK needs a jet block oring

They all do.

[outbackenduro]

Hi this is a pretty rare video information thank you for sharing it really helps.

[marksaunders]

Very important, causes all kinds of problems. I leaned out all my jetting and was still getting black spooge and erratic running. Got a new jet block O-ring and it all went away.

[jessebrown]

thanks for this video bud! I couldnt tune my 35 pwk for the life of me with any size pilot jet, sure enough the oring was beyond wore out, it tuned on a 48 PJ once I replaced it and it runs like a million bucks now, thanks again

[danmurphy]

great video I could not find this gasket for about 3 months until I came across this vid. awesome job not sure why local dealers and ebay it will not come up until you say JET BLOCK seems odd did every other senerio THANKS ALOT

[ReefaReviews]

Love this video my carb has been having my bike run like shit i ordered a couple gaskets hope this fixes it

[dirtmoto]

Thank god I think you finally solved the issue on my KDX. Just impossible to get this thing jetted at low RPMs and idle. Also loads up constantly. Definitely going to order one of these and see if it fixes my issue. Thank you!

[marioguzman]

My 01 YZ250 will get a new one, just arrived from ebay, stay tuned! Thanks for the videos.

[WheelDerness]

thanks for this video, I have problems setting the idle correctly, I have the gaskets but didnt know where to put them since in Keihin diagram are not showned. thank you!

[hungkhan]

Holy smoke, i got the same problems and countless times changing jets, or messing around with the air screw. At the end i found out my problem was not with the rubber but with the ditch that the oring to sit in, the ditch was not even so i has to hot air some plastic into parts of the ditch that was too deep. That fixed the problem hahaha

[yzrider]

You are a lifesaver! I’ve been chasing a ghost in my 2005 ktm 250 for months! Exact same symptoms as described in video. Thanks

[race]

A $15 needle valve is cheaper than buying a new piston. I've ran the CR250 in my race car that I was changing the needle valve twice a year its maintenance that's all it is
When the needle valve swells it will lean your bike out you can possibly C's it up

[jamesregan]

I could see a daylight gap in mine thats how I knew I needed a gasket.

[georgeboswell]

I hear you have a STIC metering block; you should try it. If it is not the latest updated unit contact STIC for a free upgrade.

[billterri]

How do you get it to stay in place for install Mine keeps popping out before I can reassemble.

[adamdorris]

I actually filed the jetblock mounting bosses down in the attempt to seal those orings still doesn't work

[whiteboy]

What rebuild kit do you get and do you have to purchase this gasket separately?

[freetaylor]

Hey buddy, on those old pwk carbs, are the floats bigger that the newer ones? I'm having trouble with the float not matching the manual? Therefore I can't adjust the hight..

[kylelanders]

Would this cause alot of smoking, no torque and bike feels really laggy alot of power loss and keeps fouling plugs when I pull them they are black and wet looking but my bikes jetted correctly idle screw and airmixture screw doesn't do much

[bordelonchris]

What bit did you use on the tamper proof screws?

[Montanastrokers]

Anyone know a trick to holding the o ring in place while installing back on carb? Thanks aaron