Many problems with Engine

[bladebj]

i did the rag test and it satisfy me and my friend i did for both left and right they behave equal .

Before i cleaned the carb, there is no problem like that 

i know there are only identical methods ( checking vacuum leak, carb balance, compression, cables, hoses, sparks, mixture, carb piston, orings, caps, neddles )to describe what problem is i did all of them carefully and without a doubt

i am not sure my english will satisfy what i want to describe but i will try

when i throttle left one start to run i understand it by removing the right spark plug cable engine didn't die (while idling when i removed the right one engine died) but banging exhaust and running badly

i am throttling-->
the banging of exhaust is due to fuel coming without burning from right cylinder whose cable removed explode in the exhaust because we saw the fire end of the exhaust

again i am throttling-->
i removed the cable of the left one and there is no banging or bad running everthing ok and sound good
no fire no banging right one working good

so our theory= while the right cable removed fuel from the right piston explode in the exhaust because there is enough fuel on the right

when we removed the left cable no banging in the exhaust because there is no fuel from the left

the left piston either lack of fuel or there is no fuel


left one cannot take enough fuel and it is because of pilot jet not due to vacuum leak or main jet
because hole of choke mixture is end of the carb do not touch the vacuum or butterfly system, directly goes to engine so when we pull choke it began to run

or why the problem is not due to the vacuum system is while throttling it began to run again but the reason why running badly is there no stable or good mixture pilot jets providing a stable fuel when this fuel did not come to mixture so mixture is probably poor while only left one running my engine behave like out of fuel again

another reason why i have doubt about the pilot jet of left when we turn the mixture screw of left one (although we make the mixture rich) left piston do not give any response

i hope you understand what i mean thanks your attention and patient sorry again for my bad english

[werase643]

I HAVE NEVER HEARD OF THE RAG TEST

compression test?
valve clearances?

read up on synchronizing carbs.....


if you open throttle(twist right hand) does it run better or worse?
does it run on 2 cyl at higher RPM or still just one?

[bladebj]

First make sure the plug is sparking (take it out, lay it on the engine, and hit the starter.  Should be a fat blue spark.  If not, change it.), then test the compression (w/o a compression tester, you can pull the plugs off, put a rag in the plughole, and hit the starter.  If the rag shoots across the room, that should be satisfactory).  Start there.

the rag mentioned by lawman's post

i explained how i describe the problem on earlier two posts.

the left one doesn't run while idling

when open throttle the left begin to run but very bad and loudly banging etc.

higher rpm it runs on two cylinder.

right one always runs well no problem with the right

but the left one begin to run only while throttling or choke and its sound not good working badly and loudly

[werase643]

valve clearances?

read up on synchronizing carbs.....

[bladebj]

i read and clarify balancing i balanced the butterflies and checked the vacuum and my mixture screws is 2.5 turns out carb balanced and clean everything is on it my engine was running not well but running after my carb cleaning this problem ocurred

[werase643]

you synched your carbs with vacuum guages attached to your carbs with the bike running?

[lawman]

valve clearances?

Yeah, did you ever fix the valve clearances?  I remember that was a major issue...

You had checked the spark and it was good.

So - your left cylinder DOES run, but only with the throttle turned?  What about with the choke out?  You seem convinced it's the pilot jet...  Have you checked the fuel tube (metal) that comes off the fuel T that attaches to the gas tank (or the T for that matter?)?  When you pull the spark plug, is it wet with gas?

What do you know about the history of this bike?  Does this sound like a timing thing to anyone else?  Have you checked the cam chain to be sure it's set right?

Check that carb synch thing too.  you can make a poor man's sphygmometer if you have to - piece of tubing with some oil in the middle attached to both vacuum plugs.

[bladebj]

you synched your carbs with vacuum guages attached to your carbs with the bike running?

yea i did the sync no problem with it

valve clearances?

Yeah, did you ever fix the valve clearances?  I remember that was a major issue...

You had checked the spark and it was good.

So - your left cylinder DOES run, but only with the throttle turned?  What about with the choke out?  You seem convinced it's the pilot jet...  Have you checked the fuel tube (metal) that comes off the fuel T that attaches to the gas tank (or the T for that matter?)?  When you pull the spark plug, is it wet with gas?

What do you know about the history of this bike?  Does this sound like a timing thing to anyone else?  Have you checked the cam chain to be sure it's set right?

Check that carb synch thing too.  you can make a poor man's sphygmometer if you have to - piece of tubing with some oil in the middle attached to both vacuum plugs.

yeah valve clreance done 

throttle turned and choke out the left one begins to run

just does not run while idling.

i checked the cable and spark plugs they are sparking good there no problem with eletricity of spark plugs

and not wet

timing is good no problem with timing i checked cam chain and the other timing issue by looking the manual its all done

also i checked float levels both is good

i think as i mentioned above it's due to pilot jet of left but why my left one do not take fuel from left carb pilots i clenaed the pilot and its condition good.

[bill14224]

Hmm.. sounds like you have a pretty good understanding of what's going on, and it sounds like the left pilot jet to me too.  I would think if the timing is off because of the timing chain, the left cylinder wouldn't run with choke, and it does.  And the right cylinder wouldn't run well, and it does.  That is if I understand him right.

[bladebj]

Hmm.. sounds like you have a pretty good understanding of what's going on, and it sounds like the left pilot jet to me too.  I would think if the timing is off because of the timing chain, the left cylinder wouldn't run with choke, and it does.  And the right cylinder wouldn't run well, and it does.  That is if I understand him right.

yeah your are right man i will do some checking about my pilot jet and carb i will inform you what is going on.

thanks for your intereset

[lawman]

Check the t going into the carb.

What method did you use to check your float heights?

What size pilot is in there?

[werase643]

Before i cleaned the carb, there is no problem like that   


sorry to tell you this.....it's in the carbs

check the idle circuit
make sure you can blow air through the jet
make sure you can blow carb cleaner....or brake cleaner through all internal passages in the carb body
the left one is still clogged
if you blow cleaner through a port.....it has to come out another port

[werase643]

also i'd like to know how you synched the carbs with it running on only 1 cylinder at idle

[bladebj]

Check the t going into the carb.

What method did you use to check your float heights?

What size pilot is in there?

Check the t going into the carb.

What method did you use to check your float heights?

What size pilot is in there?

the method using transparent hose.

pilots are stock

Before i cleaned the carb, there is no problem like that   


sorry to tell you this.....it's in the carbs

check the idle circuit
make sure you can blow air through the jet
make sure you can blow carb cleaner....or brake cleaner through all internal passages in the carb body
the left one is still clogged
if you blow cleaner through a port.....it has to come out another port

i cleaned carefully and noticed that you mentioned but i will do it again i will check again all iternal holes passages etc. yea you are right it probably still clogged

thanks for all to everybody

also i'd like to know how you synched the carbs with it running on only 1 cylinder at idle

the buddha's method i looked to a light source with butterflies (with carb) and balanced them till i see the light from both equally

[werase643]

your first screw up was doing something Budduh said to do.....
that is not the method for synching carbs
that is the way to get them kinda in the ballpark and has nothing to do with vacuum syncronization so that both carbs work together 50/50

[bladebj]

your first screw up was doing something Budduh said to do.....
that is not the method for synching carbs
that is the way to get them kinda in the ballpark and has nothing to do with vacuum syncronization so that both carbs work together 50/50

ok let me know how to sync vacuums while only one cylinder running as ;  if this is not a vacuum sync.

[werase643]

http://771doug.netfirms.com/synch_page.html

with one of these
http://771doug.netfirms.com/carbbalancer.gif

or make one using lots of tubing and oil.....
or get 2 Vac gauges to compare the carbs


**** found with a quick search*****

[bladebj]

http://771doug.netfirms.com/synch_page.html

with one of these
http://771doug.netfirms.com/carbbalancer.gif

or make one using lots of tubing and oil.....
or get 2 Vac gauges to compare the carbs


**** found with a quick search*****

man i know how i can find the information thanks your reply but problem as you said while just one cylinder is running how i can sync them my question was that

maybe i cant figure out the sync theory

[joshr08]

i dont know if this has ever been mentioned or not i didnt read every post but how are the intake boots on the motor?  and have you try to run the bike on prime instead of on or res.?

[werase643]

you can not synch the carbs with the bike running on one cylinder
you have to have the bike running fair before you can have it running good