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Message started by wambr on 09/16/13 at 02:02:38

Title: need some help with my sweety boy
Post by wambr on 09/16/13 at 02:02:38

hi guys! I need your help .. I have something in my brain is not enough... the situation is as follows: my baby-savage stopped develop full capacity.... when a sudden opening of the throttle he gets up in a dead end... with a smooth opening-the situation is somewhat better, but still not quite happy..  :( I understand that the fuel-air mixture too poor. and about the same to tell me the color of the spark plug. of what has been done: the carburetor I cleared(may not qualitatively? but all holes well blown); the valve clearances is norm; air filter is quite clear; the spark plug is live and healthy... help me please-what could be the problem? that done? it all happened too suddenly...

Title: Re: need some help with my sweety boy
Post by justin_o_guy2 on 09/16/13 at 02:31:50

I would wonder if the slide is free..
You  put it back clean & dry,, no fingerprints?

Title: Re: need some help with my sweety boy
Post by Face on 09/16/13 at 20:40:44

Petcock?

Title: Re: need some help with my sweety boy
Post by wambr on 09/16/13 at 22:28:51

no.. everything is perfect... just checked the night before. and fuel valve is not the cause. I changed the type -like a Raptor...

Title: Re: need some help with my sweety boy
Post by justin_o_guy2 on 09/17/13 at 07:15:21

Eeze  eet maybe zee shparkink plug?

Title: Re: need some help with my sweety boy
Post by Serowbot on 09/17/13 at 09:41:44

I'd be thinking it is carb related... sticky slide...leaky or not seated slide diaphragm...

Something affected by low engine vacuum...

Title: Re: need some help with my sweety boy
Post by youzguyz on 09/17/13 at 13:19:10


3F293E233B2E23384C0 wrote:
I'd be thinking it is carb related... sticky slide...leaky or not seated slide diaphragm...

Something affected by low engine vacuum...


I had this experience.
Fairly easy to check.
Pull the boot off between the airbox and the carb so you can see inside the carb with the engine running.
Open the throttle and watch the slide to see if it rises.  
If it doesn't or is slow to do so, try tapping on the slide with something that won't mar the surface.  If it jumps up, the slide is sticking.
If not, you probably have the leaky/poorly seated slide diaphragm.
You can put something like a wooden stick in there and lift the slide manually, and the engine should rev up.

My problem was a hairline crack in the diaphragm.  The only way to see it was to hold it up to the light.

Title: Re: need some help with my sweety boy
Post by justin_o_guy2 on 09/17/13 at 19:32:31

A crack in a diaphragm has caused many people pain,,

Title: Re: need some help with my sweety boy
Post by wambr on 09/17/13 at 23:28:08


7D6B717E63717D7E040 wrote:
[quote author=3F293E233B2E23384C0 link=1379322159/0#5 date=1379436104]I'd be thinking it is carb related... sticky slide...leaky or not seated slide diaphragm...

Something affected by low engine vacuum...


I had this experience.
Fairly easy to check.
Pull the boot off between the airbox and the carb so you can see inside the carb with the engine running.
Open the throttle and watch the slide to see if it rises.  
If it doesn't or is slow to do so, try tapping on the slide with something that won't mar the surface.  If it jumps up, the slide is sticking.
If not, you probably have the leaky/poorly seated slide diaphragm.
You can put something like a wooden stick in there and lift the slide manually, and the engine should rev up.

My problem was a hairline crack in the diaphragm.  The only way to see it was to hold it up to the light.
[/quote]
thanks for your ideas guys!
so, what else have I taken, once again, I cleared my carburetor. reviewed the condition of the diafragm and slider, as advised YouzGuyz. even tried to check the work of the slider using a vacuum cleaner.  :) I clutched the cleaner to the outlet of the carburetor, which is sent to the engine, I turned on the vacuum cleaner and turned the air valve by hand- slider raised approximately half-way. can of course vacuum cleaner poorly creates a vacuum.
as I looked, like a slider jams. even checked the compression, just in case. measurements showed me 850 kPa...
in General I still confused... I have "itching" to put jet idling larger and raise the needle jet...but for now I think-"and why did this happen?"

Title: Re: need some help with my sweety boy
Post by wambr on 09/17/13 at 23:31:07


27383E3924231222122A38347F4D0 wrote:
A crack in a diaphragm has caused many people pain,,

may be something else you can check the  diaphragm?

Title: Re: need some help with my sweety boy
Post by justin_o_guy2 on 09/18/13 at 04:57:00

I dont have a carb to look at now, so I dont know exactly how vacuum is routedto the top of the diaphragm to raise the slide, BUT, IF you can isolate that circuit & apply vacuum, then if the slide doesnt go up & stay up, youve gotr a clue.,

Title: Re: need some help with my sweety boy
Post by wambr on 09/18/13 at 08:29:03

I even tried to test the aperture: fingers lifted a finger slider and another finger plugged the semi-circular hole in the back of carburetor-channel that leads under the cover of the carburetor. and slider is not very slow, but not instantly fell in the bottom position. any of you guys tried something similar? I'm interested in the falling speed slider...
and again a big thanks to everybody who responded to my request!
you are really cool guys!

Title: Re: need some help with my sweety boy
Post by Steve H on 09/18/13 at 14:59:11

Mine falls quickly but not real fast.  There is no tick or clunk or anything when it hits the bottom.

Title: Re: need some help with my sweety boy
Post by old_rider on 09/19/13 at 00:53:05

wambr, did you install washers on the top side of the diaphragm needle? or are you running the original thick washer?  


Title: Re: need some help with my sweety boy
Post by wambr on 09/19/13 at 01:42:59

Yes.. I have the original thick washer on the upper end of the needle. I lifted the needle on one groove-up(can enrich the mixture in my carburetor)and I have got such a situation: the engine of the "stutter" to around 2000 rpm and then gained about 5000 rpm quite quickly. when I return the throttle I heard not loud backfires... >:(

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