KX Riders
  Home Help Login Register   *
Welcome, Guest. Please login or register.
Did you miss your activation email?
November 13, 2018, 08:10:21 PM

Login with username, password and session length
Recent
[November 12, 2018, 12:03:59 PM]

[November 12, 2018, 09:53:57 AM]

[November 11, 2018, 04:03:00 PM]

[November 11, 2018, 03:23:19 PM]

[November 11, 2018, 08:07:20 AM]

[November 10, 2018, 11:26:02 AM]

[November 09, 2018, 02:40:41 PM]

[November 09, 2018, 09:42:14 AM]

[November 08, 2018, 10:49:15 AM]

[November 06, 2018, 08:57:40 AM]

[November 04, 2018, 05:01:54 PM]

[November 04, 2018, 03:38:44 PM]

[November 03, 2018, 02:32:31 PM]

[November 02, 2018, 01:51:22 PM]

[November 02, 2018, 02:05:56 AM]
Pages: [1]   Go Down
  Print  
Author Topic: KX125 bogging down then races off  (Read 99 times)
0 Members and 1 Guest are viewing this topic.
txsteele
Newbie
*
Offline Offline

Joined: 10.02.18
Posts: 7


« on: October 29, 2018, 01:34:25 PM »

I know the title was kinda funky but that's the best way to describe it.

When I open the throttle, the bike takes off like a fire is lit under it. Half way through the rev cycle it Boggs down for a "2 or 3" count, but if the throttle stays wide open, the bike catches and takes off again like nothing is wrong with it. It's an older bike (2003) so I'm giving it some TLC as I do a budget rebuild. I'm hoping this sounds like a carb issue to you guys.

Additionally, after every time I ride it, no matter how long of a ride (2 minutes or 20 minutes), there is always black oil/gas residue running down the bottom of the silencer.

Any opinions would be appreciated.

I did a search on "bogging" before I posted this but all the threads were super long so I couldn't find the answer I was looking for. Thanks.
Logged
Foxx4Beaver
Hero Member
*****
Online Online

Joined: 09.08.11
Posts: 8,507


James Stewart DID NOT invent the scrub!!..JoJo


« Reply #1 on: October 29, 2018, 02:00:39 PM »

You could try thoroughly cleaning the carb, and writing down the current jetting.

Probably should do a leak down test if cleaning the carb has no affect...it could have a bad crank seal.
You said the silencer is leaking sponge...which could be a result of a bad crank seal....sucking tranny/gear oil. Does it appear to be using tranny oil, or does it stay at a consistant level?  
Logged

Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ
txsteele
Newbie
*
Offline Offline

Joined: 10.02.18
Posts: 7


« Reply #2 on: October 29, 2018, 02:17:38 PM »

You could try thoroughly cleaning the carb, and writing down the current jetting.

Probably should do a leak down test if cleaning the carb has no affect...it could have a bad crank seal.
You said the silencer is leaking sponge...which could be a result of a bad crank seal....sucking tranny/gear oil. Does it appear to be using tranny oil, or does it stay at a consistant level?  

I haven't checked that yet but I will ASAP.  It's a new bike to me so I did change the oil when I got it but haven't ridden too much since. I suppose that would be a place to start investigating. Thanks.
Logged
Foxx4Beaver
Hero Member
*****
Online Online

Joined: 09.08.11
Posts: 8,507


James Stewart DID NOT invent the scrub!!..JoJo


« Reply #3 on: October 29, 2018, 03:35:43 PM »

Be sure to verify the float height is correct too when cleaning the carb.
Logged

Excuse me, ma'am...but you've got extremely nice legs!!!...what time do they open???                                                                                                               https://www.youtube.com/watch?v=n8tCgN3aryQ
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.21 | SMF © 2015, Simple Machines
TinyPortal v0.9.7 © Bloc
Valid XHTML 1.0! Valid CSS!
Page created in 0.172 seconds with 27 queries.