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, 05:48 PM   #1
Enduronut357 OP
Adventurer
 
Joined: Jul 2013
Oddometer: 36
how much smoke is normal on first start up?

when i first start my dt400 up in the morning it smokes enough to create a blue haze across the street lol it fires up in 2 to 3 kicks when cold and one when warm . it also fouls spark plugs every two weeks
Enduronut357 is offline   Reply With Quote
Old 07-28-2013, 05:57 PM   #2
PistonPants
Crankcase Scavenger
 
PistonPants's Avatar
 
Joined: Jun 2008
Location: Cantwell, AK
Oddometer: 416
Does your DT still inject oil or do you premix? So when you leave home, figure out how far a float bowl of gas will take you (warm it up, shut off the gas, ride til it runs out). Then every time on the way home, remember to shut off the gas at this place and run your carb out. This is my practice for my premix bikes. Hope it helps.

Peace
Piston
PistonPants is offline   Reply With Quote
Old 07-28-2013, 06:09 PM   #3
Enduronut357 OP
Adventurer
 
Joined: Jul 2013
Oddometer: 36
it still injects i don't premix at all
Enduronut357 is offline   Reply With Quote
Old 07-28-2013, 06:19 PM   #4
joexr
Beastly Adventurer
 
Joined: Jan 2011
Location: S.E.
Oddometer: 3,773
Smoke is normal , plug fouling is not. Is you airfilter clean? Check out the enrichener plungers sealing tip.
joexr is offline   Reply With Quote
Old 07-28-2013, 08:19 PM   #5
slideways
permanent ex-pat
 
slideways's Avatar
 
Joined: Mar 2003
Location: Ocean Dweller
Oddometer: 5,549
Also check needle valve seat and float height.
__________________
“Speed has never killed anyone, suddenly becoming stationary… that’s what gets you.”



Upper Italian Lakes report.
http://www.advrider.com/forums/showthread.php?t=160841

South Africa, Swaziland, Botswana ride report
http://www.advrider.com/forums/showthread.php?t=454490

Great CanAm Tour
http://www.advrider.com/forums/showthread.php?t=476605
slideways is online now   Reply With Quote
Old 07-28-2013, 09:20 PM   #6
anotherguy
Banned
 
anotherguy's Avatar
 
Joined: Jun 2009
Location: the hills
Oddometer: 6,212
Do a leak down test. Yamaha strokers have an issue (not a bad thing IMHO) with holding a lot of oil in the crankcase. But with a bike that old and fouling plugs the crank seals are suspect. The transmission (right) side in your case. Does it use transmission lube?
anotherguy is offline   Reply With Quote
Old 07-28-2013, 10:14 PM   #7
Enduronut357 OP
Adventurer
 
Joined: Jul 2013
Oddometer: 36
nah no trans lube the dealer said to use 10 w 30 yamalube in the transmission leakdown test? how do i do that
Enduronut357 is offline   Reply With Quote
Old 07-29-2013, 06:29 AM   #8
anotherguy
Banned
 
anotherguy's Avatar
 
Joined: Jun 2009
Location: the hills
Oddometer: 6,212
Well the question is does the trans oil disappear?

And as far as a leakdown-this.
anotherguy is offline   Reply With Quote
Old 07-29-2013, 11:12 AM   #9
buls4evr
No Marks....
 
buls4evr's Avatar
 
Joined: Sep 2009
Location: Michissippi & Nuevo Mexico
Oddometer: 2,318
Quote:
Originally Posted by anotherguy View Post
Do a leak down test. Yamaha strokers have an issue (not a bad thing IMHO) with holding a lot of oil in the crankcase. But with a bike that old and fouling plugs the crank seals are suspect. The transmission (right) side in your case. Does it use transmission lube?

I would also think the crank seals are at fault. They are 40 yrs old quite likely. Probably leaking on mag side as well as transcase side. Ethanol gas is especially hard on them.
buls4evr is offline   Reply With Quote
Old 07-29-2013, 11:59 AM   #10
JeffS77
cheap bastard
 
JeffS77's Avatar
 
Joined: Apr 2006
Location: Riverside , CA
Oddometer: 3,322
My advice is to put all your DT400 stuff in one thread..you have the same questions bouncing around a few diferent threads you have started asking the same questions.
JeffS77 is offline   Reply With Quote
Old 07-30-2013, 06:15 AM   #11
buls4evr
No Marks....
 
buls4evr's Avatar
 
Joined: Sep 2009
Location: Michissippi & Nuevo Mexico
Oddometer: 2,318
You should realize though that your 3 threads are likely related in some way. Look at all 3 and take the good advice they offer.
buls4evr is offline   Reply With Quote
Old 07-31-2013, 12:24 PM   #12
Tim McKittrick
Beastly Adventurer
 
Joined: Dec 2003
Location: Wasilla Alaska
Oddometer: 1,705
At the risk of actually answering a question....

All of the autolube bikes I have owned smoke a lot on startup if they have been sitting for a period. My worst is an Aprilia RS250, a v-twin road racer with it's front cylinder inclined at a steep angle. It smokes like a tire fire the first time I start it on a race weekend. I believe that even pump fed systems drool a bit of oil when parked, and this pooled oil is responsible for the smoking when the machine is restarted after sitting. Once warmed and "Cleared out" all of my autolube machines become much less smokey.

I don't want to re-ignite the oils debate, as it has devolved into tiresome circular arguing, other than to say in my experience some of the synthetic mix oils seem to make less smoke when they burn. The start-up smoke is less due to the oil type than to excess oil collecting when the bike sits, so a change of oil is probably not going to have a large effect.

Your plug fouling is not likely related to the smoke on startup, assuming the smoke level subsides once the engine is warmed and happy. The autolube pump on your DT is adjustable, however, and it's possible it may be over oiling. The adjustment is pretty rudimentary, if I recall, so it may well be worth checking.

Sadly, I don't have a manual in front of me to quote from. Anyone else care to provide specifics?

The plug fouling is more likely due to either an incorrect plug, mixture issue, or ignition timing issue.
Tim McKittrick is offline   Reply With Quote
Old 08-01-2013, 04:21 AM   #13
Flood
F5lood.
 
Flood's Avatar
 
Joined: Oct 2005
Location: Austria
Oddometer: 10,161
OK ladies, out of the 31 posts in this thread, I had to move 19 down to Head Explody as they only revolved about asshattery, counter-asshattery and identification and rationalization of who's a troll and who isn't.

As someone once said "civility is enforced in the on-topic forums". If you want to bang heads, there's a perfectly fine padded cell downstairs in Jo Momma. Or just tell us about your political leanings in CS&M! People love that crap down there and the mods there have a lot more patience than I do.

Thanks for your time,
Flood

ADV mod-creature.
__________________
TEAM F5

RallyRAIDio on Twitter
RallyRAIDio on Facebook
Flood is offline   Reply With Quote
Old 08-01-2013, 07:10 AM   #14
joexr
Beastly Adventurer
 
Joined: Jan 2011
Location: S.E.
Oddometer: 3,773
Thumb

Quote:
Originally Posted by Flood View Post
OK ladies, out of the 31 posts in this thread, I had to move 19 down to Head Explody as they only revolved about asshattery, counter-asshattery and identification and rationalization of who's a troll and who isn't.

As someone once said "civility is enforced in the on-topic forums". If you want to bang heads, there's a perfectly fine padded cell downstairs in Jo Momma. Or just tell us about your political leanings in CS&M! People love that crap down there and the mods there have a lot more patience than I do.

Thanks for your time,
Flood

ADV mod-creature.
THANK YOU!
joexr is offline   Reply With Quote
Old 08-02-2013, 12:18 AM   #15
*Gmoney*
don't look here
 
*Gmoney*'s Avatar
 
Joined: Mar 2008
Location: Where I want to be
Oddometer: 910
Quote:
Originally Posted by joexr View Post
Check out the enrichener plungers sealing tip.
This post may of helped me
I am having a flat spot on acceleration that I have not worked out.
Bought a CT2 with blown crank seals replaced them and have not work out this flat spot.
Its the one thing I have not checked.
I may get back to you if you do not mind.
Plug looks rich
leaner jet no change, worse
needle on middle grove.
Up or down on needle no better
Thanks
*Gmoney* 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 05:03 AM.


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