2000 kx 125

Tryhard
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Tryhard
Edited Date/Time 6/15/2017 1:06am
Okay , so i had another thread in moto related about being on the fence about what bike would suit me best for the time being ... concluded that a 125 would be adequate , this is it "Btw not my messy ass garage lolz"



So without further or do , i got the bike dirt cheap ... was told this and that blah blah blah , made an offer on the bike with taking into account that anything and everything can be wrong ...who knows what to believe .... didnt really pay much attention to what the supposed "mechanic" told the guy i bought it from....

Bike appears to have a new or " Newer " cylinder . i have not ran a compression test yet as it dosent run well and is leaking fuel like a sob as if it is flodding , was told something about "my mechanic" says its some o ring or gasket he was not sure...

Transmisson shifts from 1st to neutral then up again to 2nd then then shifts normally through all the gears
Not sure what is going on here ?? maybe just try new gear oil?

Clutch seems to have lots of play in the assembly outside the case...

Started it again when i got hope blipped the throttle and it immediately acted as if i gave it full throttle and and maxed the rpms .... didnt do this on the test ride??? wtf ...

Owell needless to say im not scared to crack the case i have barely any money tied up in it as it sits... any advice as to where to start first would be awesome!
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Acidreamer
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Acidreamer 6/12/2017 7:27am
6/12/2017 7:27am
On the transmission, does it do that by itself? Normal shift pattern is 1st, neutral, 2nd-5th or 6th. If its falling out of gears, or shifting on its own, then youll have to look at the mechanism behind the clutch, or split the cases and examine the dogs on the gears.

For your clutch, make sure your cable is properly adjusted. If theres too much slack it can cause it to have a loose feel. Pull the cover off and look at your plates and springs for wear.

After that i would do a top end on it. This will give you the chance to look at the crank and cylinder. Also you will have fresh gaskets and that might fix your rev problem.

Clean the carb.

If you still have doubts about the motor just rebuild the whole thing. When i buy bikes in a condition like this one, a motor is first on the list. i dont like chancing worn parts i cant see or a shotty assembly job.
Tryhard
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Tryhard 6/12/2017 7:41pm
6/12/2017 7:41pm
Ok i will check all of that , and to clear up the shfiting issue ... I had a kx 100 Neutral was between 1st and 2nd , with this bike its almost like neutral is its own gear for expample ... I shift down for 1st , then shift up for 2nd but it goes into neutral , then up again and it goes into 2nd - 6th


Acidreamer
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Acidreamer 6/13/2017 2:39am
6/13/2017 2:39am
Tryhard wrote:
Ok i will check all of that , and to clear up the shfiting issue ... I had a kx 100 Neutral was between 1st and...
Ok i will check all of that , and to clear up the shfiting issue ... I had a kx 100 Neutral was between 1st and 2nd , with this bike its almost like neutral is its own gear for expample ... I shift down for 1st , then shift up for 2nd but it goes into neutral , then up again and it goes into 2nd - 6th


So when you give it a really strong pull to go into 2nd it stays in neutral? Like its not skipping neutral when you want to go to 2nd?
TrailDigger 6/13/2017 3:14am
6/13/2017 3:14am
Probably a shifter fork is tweaked.

And if it's leaking fuel the float is probably not set right, which is also the same issue with the WFO throttle.

My guess is the kid did it himself and the carb is fucked.

The tranny probably needs different oil, if thay doesn't work, split the cases.

The Shop

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Tryhard
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Tryhard 6/13/2017 4:28am
6/13/2017 4:28am Edited Date/Time 6/13/2017 4:30am
TrailDigger wrote:
Probably a shifter fork is tweaked. And if it's leaking fuel the float is probably not set right, which is also the same issue with the...
Probably a shifter fork is tweaked.

And if it's leaking fuel the float is probably not set right, which is also the same issue with the WFO throttle.

My guess is the kid did it himself and the carb is fucked.

The tranny probably needs different oil, if thay doesn't work, split the cases.
Yeah ... Im gonna run the motor how it is once I get it sorted... I think it needs different fluid as well the clutch is acting very screwy , if I end up splitting the case im gonna do a new oem crank and all , lay whats good to the side for the future ... im having a hard time finding a kit for the Keihin pwk 36s ... if anyone has any reccomendations let me know . Wish a lectron was in the budget lol , but trying to spend my budget wisely not sure what issues will arise !

Hopefully all goes well , Thanks
Hondas4Life3
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Hondas4Life3 6/13/2017 10:46am
6/13/2017 10:46am Edited Date/Time 6/13/2017 10:48am
If all of the shifter assembly looks good behind the clutch, you may be able to polish the shift star and help it shift smoother. It could also be a worn out or slightly bent shift fork in the transmission. Stick to the stock carb until you have the bike running 100%.. It will be much easier to find a baseline jetting with the stock carb.
Tryhard
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Tryhard 6/15/2017 1:05am
6/15/2017 1:05am Edited Date/Time 6/15/2017 1:06am
Okay , well I got some parts ordered ... and to my surprise its funny how much digging I had to do to find them for a decent price ... honestly with closing on my first house tomorrow ive been seriously busy ... I bought this bike only testing starting it and moving it and such ... got to checking it out yesterday ... there was absolutely no tranmisson oil in the case.. could be the culprit as to why its treating neutral as its own gear in the rotation... whatever im gonna see what happens lol.

Clutch kit with all new hardware/springs
Complete carb kit , had to buy two separate kits to get everything for the pwk 36s
All new fluids
Complete top end kit with spare cylinder that needs a replate...
I also ordered a complete spare transmission from off of ebay ... incase this one is trashed...

So hopefully after the move this weekend I can tear into this thing , I may possibly create a build thread nothing cazy...

I was looking to purchase some aftermarket wheels having a hard time finding any information as to what will work / or what my options are just buying all the parts separately and such ... only information ive gotten is 1993-2002 kdx /kx wheels have the same axles and bearings...
Looking for something good aftermarket I guess I may have to do some kind of custom wheels .

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