Maintenance & Technical > KX500 Original

need some help just bought kx 500

(1/6) > >>

khaavet:
so here is the story i bought a kx 500 1990 bike was 100% stock owner had it since it was new.all he ever did was change oil clean filter new chain and tire and put a 15 tooth gear up front and he had changed the rings once.so i took the bike out and was not happy bike ran good WOT but had a hard time getting the front end up Yes even in low gears 2,3,4 so i tore into it replaced piston,rings,reeds,sproket in front to a 14, redid packed silencer. and still it seems like the bike is very boggie and kinda dead on the bottem end like i have the choke on. now i am changing the clutch as we speak (about time after 19 years) so my guess is one of 2 things my jetting is off (set at stock 168 main 60 slow clip at 3) or my cylinder is totally shot (did not have any freddie couger marks in it looked good) any body have any good ideas
thank you  :? :? :? :? :? :-P

Thorina:
Are the power valves working properly?

khaavet:
I think so what is the best way to check thank you for the input

Thorina:

--- Quote from: khaavet on February 23, 2009, 03:42:04 PM ---I think so what is the best way to check thank you for the input

--- End quote ---

It's just a slightly "educated" guess.

The last time the previous owner did a top end, he likely didn't get the power valves back in correctly....backwards is very common.
Good way to buy a cheap bike with only a minor problem, though. LOL 

If I just did a top end and the bike didn't run right...I would assume I got the power valves in wrong.


Best way to find out...yank the top end and check the power valves.

If they don't work right, the bike won't run right.
Even with a horrible cylinder and some carb probs, that bike should still pretty much run like a raped ape.
Unless you are at a way different altitude or something....jetting all by itself shouldn't make the bike run that bad.

If it's easier,.....make sure there is no schmucky stuff in the carb.....and make sure the screen in the petcock is clean of schmuch from sitting.

I could tell you 500 things to look at after all the work you did....but my first thing would be checking those power valves....other then simply going over the extremely obvious....air/fuel mixture, etc. stuff that could have been done wrong when either you or the previous owner tore it down.
Stuff happens, ya know...the phone rings, whatever.
Go easy when you pull the cylinder and you might be able to reuse the base and head gaskets.

What does the spark plug look like? Look at it and smell it.

khaavet:
The spark plug is wet and smells like gas.  If I take off the pipe I shoulde be Abel to c the power valves and see if they are installed correctlly right? They are closed when the rod is pushed all the way in and open when the rod is pulled out. How can I check if it is working when the bike is running. Sorry kinda new to this kipps system.

Navigation

[0] Message Index

[#] Next page