95 kx 250 fouling plugs every 15-20 min - Page 2

rjm350 · 07-18-2008

I originally thought it was a bad seal letting trans fluid in, but I watch the level very close and I don't seem to be losing any trans fluid. The top end was fresh and it still did it so I don't think that is the problem either. The reeds are stock so they could be a bit old, it might be worth changing them.

Bones454 what elevation are you ridding at? I am anywhere from 3000' to 4500'. I have checked the plugs and it is getting plenty of fuel. I will try dropping a few pilot sizes once I have your elevation.
Thanks.

greenblur80 · 07-18-2008

i'd recommend rejetting at that elevation.if the reeds aren't sealing good it'll run alot richer

rjm350 · 07-18-2008

How does the Pilot jet numbering system work? Larger numbers = richer?
I think they come with a 45 in them from the factory correct?

bones454 · 07-18-2008

990 feet above sea level,ga,thats why you may want to go down slowly on pilot,if you get one ride on a plug woods riding its way to rich if you get one ride riding motocross its to rich or you are a wimp.

bones454 · 07-18-2008

My 92 came with 52 pilot but your elevation it will be higher I would drop pilot slowly till the plug is not wet and black.no need to worry about the main I do run boyesen reeds.I went down to I can ride with out fouling plugs but checked my plug often to make sure it was not to lean.If the plug is wet and black its to rich.

bones454 · 07-18-2008

Quote:

Originally Posted by rjm350

How does the Pilot jet numbering system work? Larger numbers = richer?
I think they come with a 45 in them from the factory correct?

yes larger number richer,

bones454 · 07-18-2008

As you drop a step at a time you will see the plug start to dry,you want a dark brown not black,my bike is so responcesive but not doing any damage to the motor,go back to the top of the jetting forum and if you can turn the air screw in without killing the motor its to rich.My bike is also set up at 40 to 1 honda hp2 or redline the two best oils,yamaha is good to.If anybody rides other than WFO try going down on the pilot once you get it the plug not so wet you'll see the difference.

bones454 · 07-18-2008

Sorry 92 came stock with 58 pilot not 52.

bones454 · 07-18-2008

WOODS WEAPON

rjm350 · 07-21-2008

Thanks for all the info.
I definitely need to drop the jetting, the plug is very wet and black.
You mentioned that you are running the stock Main jet. Since I got my bike used, and I'm not sure if the previous owner was messing with this carbs, what size of main jet should I be running?
Rj

bones454 · 07-21-2008

yours main is a 160 or 162 and came with a 45 pilot,I would go in steps next size down on kawasaki parts list is a 42 pilot.

07-18-2008	#23 (permalink)
rjm350 Newbie Join Date: Jul 2008 Posts: 4	How does the Pilot jet numbering system work? Larger numbers = richer? I think they come with a 45 in them from the factory correct? Last edited by rjm350 : 07-18-2008 at 06:34 PM.

07-21-2008	#30 (permalink)
rjm350 Newbie Join Date: Jul 2008 Posts: 4	Thanks for all the info. I definitely need to drop the jetting, the plug is very wet and black. You mentioned that you are running the stock Main jet. Since I got my bike used, and I'm not sure if the previous owner was messing with this carbs, what size of main jet should I be running? Rj Last edited by rjm350 : 07-21-2008 at 10:31 AM.

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07-18-2008	#21 (permalink)
rjm350 Newbie Join Date: Jul 2008 Posts: 4	I originally thought it was a bad seal letting trans fluid in, but I watch the level very close and I don't seem to be losing any trans fluid. The top end was fresh and it still did it so I don't think that is the problem either. The reeds are stock so they could be a bit old, it might be worth changing them. Bones454 what elevation are you ridding at? I am anywhere from 3000' to 4500'. I have checked the plugs and it is getting plenty of fuel. I will try dropping a few pilot sizes once I have your elevation. Thanks.

07-18-2008	#22 (permalink)
greenblur80 engine tech Join Date: Jul 2008 Location: nj,usa Posts: 10	i'd recommend rejetting at that elevation.if the reeds aren't sealing good it'll run alot richer

07-18-2008	#24 (permalink)
bones454 Still On The Kickstand Join Date: Oct 2006 Posts: 37	990 feet above sea level,ga,thats why you may want to go down slowly on pilot,if you get one ride on a plug woods riding its way to rich if you get one ride riding motocross its to rich or you are a wimp.

07-18-2008	#25 (permalink)
bones454 Still On The Kickstand Join Date: Oct 2006 Posts: 37	My 92 came with 52 pilot but your elevation it will be higher I would drop pilot slowly till the plug is not wet and black.no need to worry about the main I do run boyesen reeds.I went down to I can ride with out fouling plugs but checked my plug often to make sure it was not to lean.If the plug is wet and black its to rich.

07-18-2008	#27 (permalink)
bones454 Still On The Kickstand Join Date: Oct 2006 Posts: 37	As you drop a step at a time you will see the plug start to dry,you want a dark brown not black,my bike is so responcesive but not doing any damage to the motor,go back to the top of the jetting forum and if you can turn the air screw in without killing the motor its to rich.My bike is also set up at 40 to 1 honda hp2 or redline the two best oils,yamaha is good to.If anybody rides other than WFO try going down on the pilot once you get it the plug not so wet you'll see the difference.

07-18-2008	#28 (permalink)
bones454 Still On The Kickstand Join Date: Oct 2006 Posts: 37	Sorry 92 came stock with 58 pilot not 52.

07-18-2008	#29 (permalink)
bones454 Still On The Kickstand Join Date: Oct 2006 Posts: 37	WOODS WEAPON

07-21-2008	#31 (permalink)
bones454 Still On The Kickstand Join Date: Oct 2006 Posts: 37	yours main is a 160 or 162 and came with a 45 pilot,I would go in steps next size down on kawasaki parts list is a 42 pilot.

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