Won't start after gov removal

13angryB's

13angryB's

New Member
#1
#1
Hi,
I have a shucks baja mini, with a 5.5 jiang dong clone,
that won't start after removing the governor.

It would start on the first pull before I took out the gov.
Can't figure out what I did wrong..



I took off the governor gear & flipper linkage.
plugged the holes with 1/4-20 plugs,


The cam fell out, and I put it back in,
I lined up the dots on the crank & cam, with the piston at TDC,
as far as I could tell it was all right.. but still no luck.
(I tried re-doing this step several times, because I thought it might have been 180 out, & still nothing)


I do have spark.

I should have fuel,.. but i'm not sure.
I tried putting in my #90 jet & spraying cleaner through the carb.
but maybe it's clogged up still, I dunno..
:censure: getting frustrated..

I just got an intake, jet & valve springs for it, & now it won't run. :thumbdown:


Any suggestions on what I should try?, to get it started..
 
Last edited:
125ccCrazy

125ccCrazy

Well-Known Member
#2
#2
13angryB's said:
Hi,
I have a shucks baja mini, with a 5.5 jiang dong clone,
that won't start after removing the governor.

It would start on the first pull before I took out the gov.
Can't figure out what I did wrong..



I took off the governor gear & flipper linkage.
plugged the holes with 1/4-20 plugs,


The cam fell out, and I put it back in,
I lined up the dots on the crank & cam, with the piston at TDC,
as far as I could tell it was all right.. but still no luck.
(I tried re-doing this step several times, because I thought it might have been 180 out, & still nothing)


I do have spark.

I should have fuel,.. but i'm not sure.
I tried putting in my #90 jet & spraying cleaner through the carb.
but maybe it's clogged up still, I dunno..
:censure: getting frustrated..

I just got an intake, jet & valve springs for it, & now it won't run. :thumbdown:

Any suggestions on what I should try?, to get it started..
Click to expand...
Did you try staring it after doing all that?? or just after the govenor removal??

any chance one of the lifters fell out??

If you changed valve springs did you check to see if a keeper popped off??

Did you reset the valve lash after all this?

Is the carb gasket situated right? tight? no air leaks?

If you pulled the flywheel to plug the back hole did the key fall out and the flywheel slip on the crank??

On an engine that is good mechanically If you have spark but won't start then it's only a few things that would be wrong:
No Fuel
Timing Off (cam or ignition)
Air leak
 
A

all THROTTLE

New Member
#3
#3
Hey since you have the governor removed it wont start as good. On my engine that has a by passed gov it wont start unless i prime alot or hold the throttle open until its running. Just be carful doing this so your mini dosent go running away.

Just some food for thought.
 
Strigoi

Strigoi

#4
#4
yep. when i was running the stock carb i had to keep the throttle cracked just a bit for it to go. now with the Mikuni on it it will start first pull when the choke is on when cold. if it's warm, i just barely open the throttle (no choke) and it always starts first pull.
 
npatton19

npatton19

New Member
#5
#5
13angryB's said:
Hi,
I have a shucks baja mini, with a 5.5 jiang dong clone,
that won't start after removing the governor.

It would start on the first pull before I took out the gov.
Can't figure out what I did wrong..



I took off the governor gear & flipper linkage.
plugged the holes with 1/4-20 plugs,


The cam fell out, and I put it back in,
I lined up the dots on the crank & cam, with the piston at TDC,
as far as I could tell it was all right.. but still no luck.
(I tried re-doing this step several times, because I thought it might have been 180 out, & still nothing)


I do have spark.

I should have fuel,.. but i'm not sure.
I tried putting in my #90 jet & spraying cleaner through the carb.
but maybe it's clogged up still, I dunno..
:censure: getting frustrated..

I just got an intake, jet & valve springs for it, & now it won't run. :thumbdown:


Any suggestions on what I should try?, to get it started..
Click to expand...
Likely what happened was when your cam fell out the lifters and pushrods slid down and now the pushrods arent on the rocker arms anymore. To check for this remove the valve cover and it should be pretty noticeable if one of the pushrods arent in place. Check this and if that isnt the problem let us know.
 
8

812 Motorsports

New Member
#7
#7
I think npatton19 will be right sounds to me like the pushrod didnt fall back into the lifter right. Could also be your valve lash, if you changes the springs and didnt set you lash after that you may have one or both of your valves pushed open and cant close.
 
13angryB's

13angryB's

New Member
#8
#8
one of my pushrods was off the rocker.
..I fixed that, but it still won't start.

It just backfires.


What is the stock fuel screw setting for these?
how about with a 90 jet?
 
npatton19

npatton19

New Member
#9
#9
You shouldnt need a 90 jet unless you have an aftermarket filter and a header. Have you tried cracking the throttle open and using the choke when starting it like said above^.
 
bigevilone2

bigevilone2

#10
#10
If your running the stock carb and your sure everything is set right,put the stock air cleaner back on. My experiance is those carbs need the air cleaner on to start up.
 
TT

TT

#11
#11
Are you positive you were at TDC on the correct stroke? You may be 180 degrees off. TDC if I remember the exhaust valve is closed and the valve is loose. Go to affordables and check the instructions again. Mine with the Makuni is not easy to get fuel to the carb and takes several pulls. Disconnect the chain and check your kill button.

Sorry to hear the trouble. Valve clearence is important!

TT
 
M

mrdlg2u

New Member
#13
#13
backfire

13angryB's said:
one of my pushrods was off the rocker.
..I fixed that, but it still won't start. It just backfires.
What is the stock fuel screw setting for these?
how about with a 90 jet?
Click to expand...
Ok, if its backfiring and will not run...
you need to check the "dots" on the cam and crank. then check the valve lap. If your exhaust valve is is to tight it will stay open and backfire.

A great tool, if not over used, is Starting fluid.
if its just "hard starting" starting fluid will start it fast.

Hard starting... when you change the air filter and or exhaust, the idle circuit does not create enough vacuum... the solution is to open the idle jet. Where is the idle jet? you ask?
its under the throttle set screw...
1 - Take out the throttle set screw
2 - there is a black plastic plug under it, pry that up.
It has a large hole in the side and a tiny hole in the end (that is the idle jet)
3 - Drill the idle jet to .024 (to start with)

If you play with the little black cube on the side of the carb...it pulls off.
you can get it to idle better, but to get it to start better, you need to drill the jet.

I have pictures at Clone Engine Specifications under the gallery.
 
13angryB's

13angryB's

New Member
#15
#15
hey thanks for the info guys,
I was finally able to get this motor running last night!

I drilled out the idle jet to .024

Replaced the spark plug.
(for some reason it had a briggs plug in it. :confused:)


Now it runs.. but it dosn't rev up.
I have to hold the throttle open or it dies.

Current mods are Uni Filter, 18 lb springs, #90 jet,
still stock exhaust until later this week.

I didn't have much time to mess with it,
because I was haveing too much fun riding my other mini..
but I assume, I just have to adjust the mix screw,.. since I changed the jet,.. right?
 
npatton19

npatton19

New Member
#16
#16
That 90 jet is way too big for a stock muffler, thats probably why it wont rev up. Get a freeflowing header for your setup or a smaller jet and you will be running good.
 
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