Page 1 of 1

Need Help with Jetting

Posted: 02:55 am Mar 12 2012
by brandongraham
I just bought my 1st dirtbike. 2002 KDX 200

I thought it ran fine, but a few friends said my Jetting must be all OFF. It smokes a bit to much and has too much excess fuel blowing out the pipe.

And it must Foul the plugs each time I ride, because the next time I ride, it does not start and then I ADD a new Spark Plug and it fires up on the first kick.


I have a FMF Gnarly Pipe and PowerCore2 on it. And have the Airbox lid OFF.



I am not ready for the RB Carb. yet.


My Carb is stock and I will find out the Jets in it now and report back.

Posted: 09:21 am Mar 12 2012
by fuzzy
Clean air filter? Silencer freshly packed?

Posted: 01:54 am Mar 14 2012
by brandongraham
Air Filter is CLEAN.

Silencer is Good.


I am new here but what does a Air Filter or Silencer have do with my Plugs being Fouled after each ride.

Is this a Carb. problem, maybe my jetting is way to much.

Posted: 02:20 am Mar 14 2012
by SS109
>|<>QBB<
brandongraham wrote:...what does a Air Filter or Silencer have do with my Plugs being Fouled after each ride.
Well, they both affect your jetting!

Posted: 06:13 am Mar 14 2012
by Julien D
Much more than you think. Dirty air filter and clogged silencer equates to less airflow which causes your jetting to be rich where it might otherwise be just fine. Best bet is ditch the airbox lid if you haven't, and then follow the sticky on jetting proecure. We can guess at jets to throw at it all day long, but every bike is different, and every rider even more so.

Posted: 10:49 am Mar 14 2012
by fuzzy
Indeed...those were just two things to check because your jetting could be right or at least better than you describe, and cause these symptoms.

Read up here:
http://kdxrider.net/forums/viewtopic.php?t=1156

Posted: 12:43 am Mar 15 2012
by brandongraham
I need some help here.

I was thinking about doing the Carb. Modification with RD Designs, So I decided to take off my Carb for the first time and see what Jetting I had.

Some how I dropped the Carb and broke one of the pieces that hold the Pin in place to keep the Float in place.

Is this something that can be fixed.

Posted: 02:01 am Mar 15 2012
by SS109
Oh, crap. :shock: As far as I know that means the carb is toast. It is a casting so it cannot be welded and I highly doubt any type of adhesive/bonding agent would withstand the constant fuel exposure and vibration.

Someone, please correct me if I'm wrong!

EDIT: You might be able to use this stuff to fix it: http://www.alumiweld.com/index.html Supposedly can fix cast/pot metal.

Posted: 08:47 am Mar 15 2012
by fuzzy
DOH! Time to hit up ebay or the FS/wanted on here for a OEM PWK carb. Take to a local TIG welder first.

Posted: 05:22 pm Mar 15 2012
by diymirage
*cough*airstriker*cough*

Posted: 05:35 pm Mar 15 2012
by brandongraham
It broke into several tiny pieces so it is Trash.

What is up with the Keihin PWK 35 Air Strikers.

What does Air Striker mean and do for my bike.


Will this work on my Bike.


I found thes PWK35 Air Striker on this site, is this a good deal and will it work for my bike and fit my Airbox.

http://www.jrgraham.com/itemdetail.do?a ... m_id=75874

Posted: 05:38 pm Mar 15 2012
by rbates9
I work with a guy that broke the ear off the carb that holds the float pin on his old four wheeler. Another guy from work convinced him to clean it up REAL good and use JB weld on it and bake it in the oven for a bit so it could cure good.

We all got a good laugh at the guy for trying it but that was about a year and a half ago and it is still working fine. So yes it can be fixed but if you go that route I wouldn't spend the money on the RB carb mods on a cobbed up carb.

If you do end up buying a carb and plan on having RB do the mods than I would just buy the carb from RB with the mods already done. You will get a new carb all done for probably less than buying a used carb and having it done.

Posted: 05:48 pm Mar 15 2012
by rbates9
The air striker is supposed to be more forgiving to jetting variances.

Right from RB all done with the mods and air screw it is about $370 for the air striker. $350 for a non air striker.

http://rb-designs.com/

Posted: 06:24 pm Mar 15 2012
by brandongraham
What is difference between Air and Non Air.

How do I decide which is better for me.



Anyone know about this company, They are cheapest I can Find.

Jets R Us
NON AIR STRIKER
http://www.jetsrus.com/individual_parts/016_150_su.html

AIR STRIKER
http://www.jetsrus.com/individual_parts/016_160_su.html

Posted: 07:44 pm Mar 15 2012
by SS109
Jets-R-Us is a very reputable company. :supz:

Posted: 10:34 pm Mar 15 2012
by brandongraham
Any tips on how I should decide which to buy.

Air Striker on Non Air Striker.

Posted: 07:11 am Mar 16 2012
by Julien D
The air striker is a little more advanced with venting and such. It has no dissadvantage as far as I know, so I would probably go that route.

Posted: 08:26 am Mar 16 2012
by fuzzy
If you wan to go the RB route in the long run just get the carb from him now. $345total - $165carb mod = selling you the carb for $180. If you buy a new carb it will need jets, and possibly a slide ($$). His carb will come jetted all good to go for you.

The difference between an AS and non-AS used to be A LOT more than $20 so definitely get the AS carb regardless.

Posted: 10:40 am Mar 16 2012
by Slick_Nick
Get a new air striker from RB, problem solved.

Posted: 04:44 pm Mar 16 2012
by brandongraham
RB does not take Credit Cards, so I do not have time to waiting 7 to 10 Days on getting the New Carb.

I will have to buy a Used one for my trip and then send it to RB.

Someone get this RB set up with PayPal. Hell I would even pay the Credit Card Fees.