srry i dont post more about my kdx on here it jsut never breaks down ;)
i have a 1986 klr 250 in the shop at the moment and it seems to be burning oil. a couple months ago it got sand in the cylinder and siezed all the rings so i cleanded them all up and reused them. it worked fine lots of compression and not burnt oil. anyway latly iv noticed that it would always burn a little oil but not much so i though it might be the valve seals. any idea how to check them without taking the whole valve assembly apart? the head and cylinder are off now. so recently i had the bike at the track and dirt got into the carb so i cleaned it and ran the thing and it filled the backyard with smoke! wayyy to much to be valve seals (from what iv read) so i looked at the rings on the piston and the oil scrapper has a lot less of a diameter than the compression rings. is taht normal?
any help? it ran great for a month or 2 after the sand got in and i jsut cleaned all the rings and valves
good old 4 strokes
-
- Member
- Posts: 57
- Joined: 07:33 pm May 15 2011
- Country:
- Location: burlington on
good old 4 strokes
1995 kdx 200 my baby
1986 klr 250
1989 yamaha blaster 200 just like the kdx
1983 kl 250 bought the thing for $100 it wont die
1986 klr 250
1989 yamaha blaster 200 just like the kdx
1983 kl 250 bought the thing for $100 it wont die
- scheckaet
- KDXRider.net
- Posts: 3740
- Joined: 12:09 am Nov 10 2005
- Country:
- Location: edmond oklahoma
Re: good old 4 strokes
Are you for real???brayden55 wrote: i have a 1986 klr 250 in the shop at the moment and it seems to be burning oil. a couple months ago it got sand in the cylinder and siezed all the rings so i cleanded them all up and reused them.
what did you expect?brayden55 wrote:so recently i had the bike at the track and dirt got into the carb so i cleaned it and ran the thing and it filled the backyard with smoke!
your valves seats are probably fubar along with your rings, and cylinder wall is probably messed up from eating all that sand...
02 KX 200 hybrid: RB head and carb
Sold ☹ DRZ 400 SM
bike build: http://www.kdxrider.net/forums/viewtopi ... ike+stable
bike profile http://www.kdxrider.net/forums/viewtopi ... 0709#30709
newb info: http://www.kdxrider.net/forums/viewtopi ... 57#p117919
jetting guide: http://www.kdxrider.net/forums/viewtopi ... 105&t=1156
Sold ☹ DRZ 400 SM
bike build: http://www.kdxrider.net/forums/viewtopi ... ike+stable
bike profile http://www.kdxrider.net/forums/viewtopi ... 0709#30709
newb info: http://www.kdxrider.net/forums/viewtopi ... 57#p117919
jetting guide: http://www.kdxrider.net/forums/viewtopi ... 105&t=1156
- Julien D
- KDXRider.net
- Posts: 5858
- Joined: 07:53 pm Nov 07 2008
- Country: USA
- Contact:
- gsa102
- Supporting Member II
- Posts: 453
- Joined: 12:33 pm Aug 16 2011
- Country:
- Location: PA
I do not know of any way to check valve seals, except by visual inspection. You can borrow a valve spring compressor from autozone or advance auto, use it to pull the valves and replace the seals. Pretty easy with the right tool. Your bike is old enough to need them. The seals should be fairly cheap, or even come with the gasket set you will need to reassemble the engine. Ask to make sure.
And the oil rings are probably shot. If you have a manual, it will give you an end clearance for them if you would take them off of the piston and just put the ring in the bore. You measure the gap between the ends with a feeler guage, too much end gap and they say replace it. I say don't bother, buy a new piston and rings since you have it apart. Check the cylinder closely for damage.
And put in a new cam chain...
It should run another 25 years if you keep the dirt out of it.
And the oil rings are probably shot. If you have a manual, it will give you an end clearance for them if you would take them off of the piston and just put the ring in the bore. You measure the gap between the ends with a feeler guage, too much end gap and they say replace it. I say don't bother, buy a new piston and rings since you have it apart. Check the cylinder closely for damage.
And put in a new cam chain...
It should run another 25 years if you keep the dirt out of it.
This is my rifle, this is my gun, the YZ to go fast, the KDX is for fun!
96 KDX 200, 09 YZ 250
96 KDX 200, 09 YZ 250
-
- Supporting Member III
- Posts: 1484
- Joined: 02:26 pm Jun 29 2005
- Country:
- Location: Alabama
If you have a compression tester you can usually tell if rings are going or valve seats are leaking.
Check compression on a warm engine, throttle wide open.
Add a teaspoon of oil to the cylinder and check again.
Improved compression indicates a ring problem - oil in the cylinder will help the rings seal but not the valve guides
I had an XR200 we did some horrible things to. It just kept on running.
Check compression on a warm engine, throttle wide open.
Add a teaspoon of oil to the cylinder and check again.
Improved compression indicates a ring problem - oil in the cylinder will help the rings seal but not the valve guides
I had an XR200 we did some horrible things to. It just kept on running.
'08 KTM200xc
'99 CR/KDX Hybrid with that RB stuff done to it
KX100 for the boy
'99 CR/KDX Hybrid with that RB stuff done to it
KX100 for the boy
-
- Member
- Posts: 498
- Joined: 03:44 pm Jul 30 2009
- Country:
IMO - By the sound of things, you need to disassemble the top end and rebuilt it - new piston/rings, and valve guides and seals at a minimum.
I had an older KLR250 as well (it seems that I have owned pretty much everything). Mine ate the cam journals, and started making horrible noises. I found a used head (no small feat in the days before CL and E-Bay) and just replaced the whole thing.
Again, parts prices could quite possibly make repairing this machine impractical. Many bikes meet their fate this way. Then they like to end up in my garage. But I am trying to quit. Really, I am.
I had an older KLR250 as well (it seems that I have owned pretty much everything). Mine ate the cam journals, and started making horrible noises. I found a used head (no small feat in the days before CL and E-Bay) and just replaced the whole thing.
Again, parts prices could quite possibly make repairing this machine impractical. Many bikes meet their fate this way. Then they like to end up in my garage. But I am trying to quit. Really, I am.
2004 Dual Sported KDX200
1999 Ninja 250 (Daughter's)
1996 DR 650 (stock, mostly street use)
1999 Ninja 250 (Daughter's)
1996 DR 650 (stock, mostly street use)