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-   -   carb problem , and noise from engine (https://www.suzukicentral.com/forums/17-maintenance-repairs-tuning/176487-carb-problem-noise-engine.html)

piki 07-23-2019 01:04 PM

carb problem , and noise from engine
 
hi
1. i have dvx400-same as ltz400-drz400 , 2007
its only start with carb spray , when its cold , then its run perfect , and start with a touch in the starter
for long as it warm.
fuel reach the carb , and when i open the side of the carb which go to the engine i saw that there is a bit amount of fuel in there, not enough to start tho.any thoughts?

2. i have some weird noisein the engine, who goes away when i push the throttle, do u think its related to cam tensenior?

jetmech25 07-23-2019 09:25 PM

The starting problem you described sounds like a symptom of valve clearance being out of specs.
If the noise sounds similar to rattling a can of spray paint, then the valve timing chain is probably stretched out.

Go to Tools, Advanced Search, and look for valve adjustment and checking timing chain adjuster to see how to check both.

Oh, and the DRZ valve train is a bit different the the DVX/LTZ.

piki 07-24-2019 03:47 AM

ok ty very much for reply
i thought its the clearence already

piki 07-24-2019 03:51 AM

Quote:

Originally Posted by jetmech25 (Post 1489081)
The starting problem you described sounds like a symptom of valve clearance being out of specs.
If the noise sounds similar to rattling a can of spray paint, then the valve timing chain is probably stretched out.

Go to Tools, Advanced Search, and look for valve adjustment and checking timing chain adjuster to see how to check both.

Oh, and the DRZ valve train is a bit different the the DVX/LTZ.

another thing , why its start with spray carb tho to the clearence?
also when its warm it does start with only the starter

jetmech25 07-24-2019 12:56 PM

As valves are going out of clearance specs (becoming too tight), it tends to still start when cold. As the valve itself warms up and expands a little, it makes the clearance even tighter. Eventually, it won’t start at all.

piki 07-24-2019 04:38 PM

Quote:

Originally Posted by jetmech25 (Post 1489087)
As valves are going out of clearance specs (becoming too tight), it tends to still start when cold. As the valve itself warms up and expands a little, it makes the clearance even tighter. Eventually, it won’t start at all.

aight
iu wanted to do the valve adjust alredy, i ordered the shims ,will update after im done :wink2:

amcf18 07-26-2019 03:31 PM

It could also be a stuck /dirty choke, not letting it cold start..

piki 07-28-2019 09:03 AM

Quote:

Originally Posted by amcf18 (Post 1489099)
It could also be a stuck /dirty choke, not letting it cold start..

if i checked tha valve gaps, at the tappat, and its out of the limits , its probbely the valve adjsment , aint it?

piki 07-28-2019 10:24 AM

BTW its a new carburtor -few months , i bought it with this carb

amcf18 07-29-2019 12:13 AM

Quote:

if i checked tha valve gaps, at the tappat, and its out of the limits , its probbely the valve adjsment , aint it?

Yes.

piki 08-04-2019 04:18 PM

OK so while waiting for shims to arrive,we bought another dvx400 for a friend, and i noticed that the oil tank cap/dip stick , is way longer then mine, i have puted like 3+ liters in the last oil change , seems odd to me back then , might explain the noise from engine , and thhe fact that there was some oil in vacum line.

any1 know how long the stick should be , and how much oil supposed to be in dvx 400/ltz400?

piki 08-04-2019 05:53 PM

found that its around 2000 ml
does this overfill of oil can do some damage?

jetmech25 08-04-2019 08:09 PM

If you put more than 2000ml in it, it will usually blow it out of the crankcase breather. Still, not a good idea to put too much in it.

piki 08-05-2019 03:50 AM

Quote:

Originally Posted by jetmech25 (Post 1489145)
If you put more than 2000ml in it, it will usually blow it out of the crankcase breather. Still, not a good idea to put too much in it.

will need o replace my dipstick to original 1


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