ADVrider

Go Back   ADVrider > Bikes > Old's Cool > 2 smokers
User Name
Password
Register Inmates Photos Site Rules Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
Old 07-28-2013, 06:11 PM   #1
Enduronut357 OP
Adventurer
 
Joined: Jul 2013
Oddometer: 36
why would a dt400 eat spark plugs??

i have to replace my plug like every two weeks cause it keeps eating them, could it be improper jetting?? any other things to check to figure out why it has a apatite for plugs??
Enduronut357 is offline   Reply With Quote
Old 07-28-2013, 06:16 PM   #2
joexr
Beastly Adventurer
 
Joined: Jan 2011
Location: S.E.
Oddometer: 3,773
Clogged airfilter or deteriorated seal on the end of the enrichener plunger. You could try backing out the air screw , but due to age I'm leaning towards the plunger not sealing when closed.
joexr is offline   Reply With Quote
Old 07-28-2013, 06:19 PM   #3
Enduronut357 OP
Adventurer
 
Joined: Jul 2013
Oddometer: 36
where is the enrichner on it then??
Enduronut357 is offline   Reply With Quote
Old 07-28-2013, 06:30 PM   #4
joexr
Beastly Adventurer
 
Joined: Jan 2011
Location: S.E.
Oddometer: 3,773
The plunger goes in and out when you use the choke lever. Remove it from the carb and check out the seal on the end that goes inside.
joexr is offline   Reply With Quote
Old 07-28-2013, 07:03 PM   #5
Enduronut357 OP
Adventurer
 
Joined: Jul 2013
Oddometer: 36
is this the enrichiner?


Enduronut357 is offline   Reply With Quote
Old 07-28-2013, 07:16 PM   #6
joexr
Beastly Adventurer
 
Joined: Jan 2011
Location: S.E.
Oddometer: 3,773
Yes. The rubber end of it seals off a fuel passage.
joexr is offline   Reply With Quote
Old 07-28-2013, 09:12 PM   #7
Enduronut357 OP
Adventurer
 
Joined: Jul 2013
Oddometer: 36
how do i test it?
Enduronut357 is offline   Reply With Quote
Old 07-28-2013, 09:18 PM   #8
Foot dragger
singletracker
 
Foot dragger's Avatar
 
Joined: Dec 2006
Location: chico,just below rag dump(nor-cal)
Oddometer: 12,690
..............................*................... ......
__________________
Some bikes around at times
Foot dragger is offline   Reply With Quote
Old 07-28-2013, 10:01 PM   #9
Enduronut357 OP
Adventurer
 
Joined: Jul 2013
Oddometer: 36
il figure it out myself then
Enduronut357 is offline   Reply With Quote
Old 07-29-2013, 12:16 AM   #10
Twin-shocker
Beastly Adventurer
 
Joined: Jan 2012
Oddometer: 1,673
If your bike is jetted very weak then plug may well overheat and burn out quite quickly, but if it runs ok and the jetting hasnt been changed, thats not likely to be your problem.

First thing of all to check is whether or not you have the right plug fitted. If it is the right plug, then have a careful look at one of the plugs which has failed.

Plugs which are peppered with specks of melted metal, indicate internal engine damage, while those which have a white almost sandblasted appearance, may mean "tuning" work has been carried out, which might mean the need for a colder heat range plug to be fitted.

All the above is with the proviso that the fuel you are using is good, the carb is clean or has been recently serviced, and your ignition timing has been recently checked and found to be correct.

If the bike is running very poorly and gets worse as it warms up, and the failed plugs are completely black and contaminated with unburnt fuel, then your problem may have to do with excessively rich mixture, but in these cases the poor running would be much more of an issue than the need to change plugs, so rich mixture sounds unlikely.
Twin-shocker is offline   Reply With Quote
Old 09-08-2013, 08:34 PM   #11
jimroid
Adventurer
 
Joined: May 2013
Location: Wichita Kansas-USA
Oddometer: 80
Is the trans fluid going low? Maybe a crank seal is out and sucking trans fluid into the crankcase?
jimroid is offline   Reply With Quote
Old 09-09-2013, 05:09 AM   #12
anotherguy
Beastly Adventurer
 
anotherguy's Avatar
 
Joined: Jun 2009
Location: the hills
Oddometer: 5,936
While all these guesses are wonderful they are nothing more than guesses.

Could you post a photo of an "eaten plug?" And a little more info on what the bike does prior to needing a plug,modifications,ect.
__________________
A lie has no feet......it can't stand alone.............
Jason Newsted
anotherguy is offline   Reply With Quote
Old 09-09-2013, 05:44 AM   #13
klp
Gnarly Adventurer
 
Joined: Nov 2009
Location: Andover, Ma
Oddometer: 233
Quote:
Originally Posted by Enduronut357 View Post
how do i test it?
Probably the most effective way would be to replace it with a new one.

I have another guess - poor combustion caused by low compression. Try a compression test and see what you've got.
__________________
Lots of old Hondas, 2 Yamahas, 2 Kawi's.
klp is offline   Reply With Quote
Reply

Share

Thread Tools Search this Thread
Search this Thread:

.
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On

Forum Jump


Times are GMT -7.   It's 12:46 AM.


Powered by vBulletin® Version 3.8.5
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Copyright ADVrider 2011-2014