tzr/r carb help.

wheelie916 · Derestricted Danger Joined: 15 Apr 2006 Karma :

i have a italian 4dl TZR125R i left standing for a week or 2 when i started it up it ran fine then stalled and refused to start, so i cleaned out the carb and tried agian.
Now i can get her to start and idle happily but when ever i rev her up she bogs down and stalls and is a pain to restart.
i have checked the floats all jets and the air screw is set to 1 1/2 turns and she is running a standard air box but the filter is old and has holes in it...

148 main jet 38 other jet U21 needle and the carb is vhsa32 del'oroto

Any help as to why she is doing this....

Thanks

Jas

simon1221 · World Chat Champion Joined: 28 Jul 2004 Karma :

Does it bog down with the choke on/off?

Are you sure it hasnt run out of fuel Question

____________________
DNA50 (sorry) ->> TZR125l >> GPZ500S

wheelie916 · Derestricted Danger Joined: 15 Apr 2006 Karma :

it bogs down without the choke yeah plenty of fuel getting in.
it seems it only needs the smallest amounts of choke, i mean im just touching the cable and it seems fine......its doing my head in now............

Thanks

Jas

wheelie916 · Derestricted Danger Joined: 15 Apr 2006 Karma :

right i thought sod it i'll take her for a blast.
first gear without choke died
first gear with choke pulls up to around 4500 fine then dies
same in all gears pulls up to around 4500 then bogs down and stalls.....
what the hell is going on with this bike

HELP!!!!! lol

jas

simon1221 · World Chat Champion Joined: 28 Jul 2004 Karma :

If it works wih the choke then its either too lean, or your air filter is falling off or a tear in the manifold somewhere. Have a look around the carb and look for holes in the manifold.

Have you done normal things like:

Change spark plug

Charge Battery

Check oil level

etc ?
____________________
DNA50 (sorry) ->> TZR125l >> GPZ500S

wheelie916 · Derestricted Danger Joined: 15 Apr 2006 Karma :

works with the choke on up to 4-5k then dies lol
all are fine mate changed plug this morning as well

when you say lean you mean not enough fuel yeah
how do i get more in there the needle is set 1 lower than middle air screw is 1 1/2 out which should i change?

thanks m8

Jas

simon1221 · World Chat Champion Joined: 28 Jul 2004 Karma :

Somebody posted a link to a guide to tuning up a carburettor, starting from the main jet or something.

Best thing is to find the standard settings and put them at that, then ask yourself why there isnt enough fuel.

Maybe you have gunk in your tank and its not getting through or maybe an inline fuel filter?

If you have checked your manifold, airbox etc, maybe see if the floats are stuck in the carburettor float bowl?

Basic way to get more fuel through is to raise the needle up a notch, but if it has just started doing this suddenly it sounds more like a fuel blockage than anything else.

Maybe there is water floating around in the tank or the dreaded "carb icing" ?
____________________
DNA50 (sorry) ->> TZR125l >> GPZ500S

wheelie916 · Derestricted Danger Joined: 15 Apr 2006 Karma :

thanks...... i will try taking the carb of again and strip and rebuild it again i didnt see and cracks in manifold or air box the air filter is bad (breaking up)but was like that before problem.
I've been told it could be the crank seals, but im not loosing any oil so i dont think its that.
If i could return it to the original settings i would but i dont know what they are lol.
Could it be too much fuel getting in ?

Im also going to get fresh fuel tomorrow just in case...

Anything else you think i should look for/at?

Thanks again

Jas

simon1221 · World Chat Champion Joined: 28 Jul 2004 Karma :

A sign of 'too much fuel' is when tou take the plastic part (that goes up and down Rolling Eyes

) inside the carburettor out and it is dripping in fuel.

Another sign of too much or too little is usually the spark plug, but that may not have registered just yet as you havent really gone anywhere.

Try running it on the stand or very slowly down the street with the fuel cap open to see whether the breather pipes could be blocked. Idea

Have a look in the TZR section of 125ccSB Forum to see whether there is an online guide there or just to repost your question as there is quite a few people with the imported TZR like yours.

Actually: Here is the very post with the user guide in

Good luck! Thumbs Up

____________________
DNA50 (sorry) ->> TZR125l >> GPZ500S

wheelie916 · Derestricted Danger Joined: 15 Apr 2006 Karma :

Mmmm breather pipe you say there is only to pipes on my tank both go to fuel taps (main/reserve).
thanks for the links im a member there already but no ones helping Sad

got the manual and found that it should be 2 1/2 turns on air screw mines set at 1 1/2.

thanks for your help

Jason

wheelie916 · Derestricted Danger Joined: 15 Apr 2006 Karma :

just been messing around again and it seems it too much fuel, ive turned the air screw out by only just over 1 turn and she runs fine just smokey as hell.

Gonna try a plug check now..

Here goes nothing.

Jas

wheelie916 · Derestricted Danger Joined: 15 Apr 2006 Karma :

Plug chop done and its a tan color and dry from what ive seen thats good.
So things are looking up now Smile

as long as it stays like that

Many thanks to all that helped me sort this out Thumbs Up

Jas