Jetting!!! Again and again and again!

[umberto]

I'd snatch up a "P"...
don't buy the pilots or main jets from Rocky...they are NOT genuine Keihin, even though they're listed in the OEM Kawie parts fiche/diagram...they're cheap bootlegs.

Buy the mains and pilots from here....
http://pjmotorsports.com/
they sell Genuine Keihin jets.

you can buy the needle from Rocky, it'll be genuine.

I'll do that.  Thank you Foxx!

[umberto]

I am going to do a leak down test this evening to see if that is the problem or not.  I'll let you guys know what I find.  I won't lie, I'm pretty nervous about doing it.  The last thing I want to do is tear this motor back down again.  

Rocky Mountain has the N82 in K, L, M, N, and P.  Any thoughts on which one I should get?  The N and the P are in stock, the other ones they will have to order.  Should I also update the pilot jet?  The stock one is listed as a 55 (I have a 50 now), but they have 58, 60, 62, and 65 in stock.

I really appreciate all the help.  I'd be lost without you guys.

Dont go turning the motor with the inlet blocked {doing the leakdown test} or u could created a leak


Sounds like you a rich on the needle though/     

I was going to put the piston at BDC and then plug up the motor at the intake and exhaust with expanding automotive plugs.  My leakdown tester is from Harbor Freight, and works at 15 psi through the spark plug.  Am I doing it correctly?

[Foxx4Beaver]

As it was the wrong needle fitted i did not see any harm on trying it {though it would be like 1369n on 3rd clip ]   , try every clip position if he has time .
 Since he got that motor on ebay, the motor might never have ran with that carb[jetting}
probably  better off trying a good working kx500 carb even thought the jetting on the 88 could vary a little due to bigger case volume  

that's all fine and dandy if you're gonna take full responsibility if something bad should happen....as we all know, these motors run extremely hot when they're jetted correctly...start leaning things out too aggressively at one time, the temps rocket up in seconds....
safer to stick with small steps at a time.

[alexander-vmann]

i got a qestion abot reeds or rather the reed block, i took of the reed to install my new boyesen power reeds and inside the reed cage there was a white plastic instert that pops out, on my 93 parts engine there is no such plastic insert, and i cant find it in the oem parts list, what is this insert and what does it do?

[dave916]

As it was the wrong needle fitted i did not see any harm on trying it {though it would be like 1369n on 3rd clip ]   , try every clip position if he has time .
 Since he got that motor on ebay, the motor might never have ran with that carb[jetting}
probably  better off trying a good working kx500 carb even thought the jetting on the 88 could vary a little due to bigger case volume  

that's all fine and dandy if you're gonna take full responsibility if something bad should happen....as we all know, these motors run extremely hot when they're jetted correctly...start leaning things out too aggressively at one time, the temps rocket up in seconds....
safer to stick with small steps at a time.

I Was thinking a run up and down the yard {road} not a mxrace   it was only goin to be a quick guide
Was thinking umberto had the since to not drive it to far if was lean or not running right 

[Danger4u2]

Lets get the bike out of the container and pull the carburetor, clean it up and test with it.
That would tell us quick if it's a carb problem.
That's as good a reason for me to start messing with that bike as any.  It was a running
bike when I bought it years ago. It's most likely all stock. 
If I remember right it's a 2002.
Let me know what day is good for you.

[umberto]

Lets get the bike out of the container and pull the carburetor, clean it up and test with it.
That would tell us quick if it's a carb problem.
That's as good a reason for me to start messing with that bike as any.  It was a running
bike when I bought it years ago. It's most likely all stock. 
If I remember right it's a 2002.
Let me know what day is good for you.

That would be awesome!  My son has a swim meet this weekend, but I might have some time on Sunday. Are you busy this weekend?

[Danger4u2]

Early would  work for me 7:30/8?
No heat in the garage but the shop has heat and fork lift.

[DoldGuy]

No more than 6 psi on the leak down test, KX500 seals are captive but too much pressure can still cause problems.

Sounds like this is a good motivator for Danger to get his K5's going again & very nice he is helping out with the carb. Also would be nice for you to be able to ride a stock K5 to have the feel of, letting you know what to expect from yours. If his carb fixes your issues, remove the jet block on your PWK to inspect.

Hope all works out well,

DoldGuy

[umberto]

Early would  work for me 7:30/8?
No heat in the garage but the shop has heat and fork lift.

That works perfectly for me. Thank you again for letting me borrow a carb, it should help answer the question one way or the other.

[umberto]

No more than 6 psi on the leak down test, KX500 seals are captive but too much pressure can still cause problems.

Sounds like this is a good motivator for Danger to get his K5's going again & very nice he is helping out with the carb. Also would be nice for you to be able to ride a stock K5 to have the feel of, letting you know what to expect from yours. If his carb fixes your issues, remove the jet block on your PWK to inspect.

Hope all works out well,

DoldGuy

Thank you for letting me know the proper psi setting. My leak down tool is set up for 15 psi, so I'll have to do some tinkering. I agree that I am very fortunate that Danger is so generous with his time and toys.  500s are very foreign to me. I've mostly rode 250s and smaller bikes as an adult. I'll keep you guys posted on the results.

[sandblaster]

Cool!

[Motorrad]

Vacuumed test

[umberto]

Vacuumed test

I have a vacuum pump.  I'm guessing it works just like the leakdown, but in reverse?  So I rig up a vacuum gauge, pull the vacuum and see if holds.  It wouldn't take a ton of vacuum to see if the seals were holding, correct?

[Motorrad]

I test at 6 psi  pressure.... Then vaccumee.   I have seen motors that are running odd, pass the pressure test, then fail miserably at vaccumee......   I'd bet $20 your kips shaft leak