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Author Topic: carb boot trouble  (Read 2913 times)

iwantmore

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carb boot trouble
« on: December 15, 2009, 01:46:40 PM »

im having a bit of trouble at the minute.

somehow i have or it has just happened, broken the rear pipe that connects the carb to the engine.

i ordered a new one from richard, it came yesterday.

when i went to fit it, it isnt the same?? its slightly longer and only has 1 tube connector on it?

whereas mine has 2?

also the one on the bike says GV125 and the one richard sent says GT250.

contacted richard and he says hyo have told them they are the same  and clearly there not, he has ordered the right one for me but it is out of stock so dont know when i will get it.

richard being the great guy he is has said to keep the one he sent. and will send the right one when he gets it.

i am wondering if i can someone use it in the short term so my bike isnt garage bound for too long.

the thing bugging me is that both the 250 and 125 are the same supposadly (on the outside anyway)

so why would these be different?

from what i can see both have same bore, just the new one is taller.

does anyone know why they are different?

i think i might try fitting it again, it will make the rear carb stick up higher than it does now will this be a problem?

here is the old one



the new one looks like the pic in carb 101, except the rear pipe has 1 pipe outlet on the side (pics both from same side)



i dont understand why they are different?

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gtr

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Re: carb boot trouble
« Reply #1 on: December 15, 2009, 07:20:50 PM »

they are probably of the different size for the different cylinders...
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Mike on the Rock

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Re: carb boot trouble
« Reply #2 on: December 15, 2009, 08:47:53 PM »

The Boots: GV/GT all bikes 125/250/650 and the 700 if it ever gets here ::)

The front and the back boots are not the same.

Some Boots have NO vent tube, some have a vent tube, depends on where the bike is going, what year and what was in hand when the bike was assembled.

 When ordering then tell then you need vent tubes in both the front and the back,
 then you can balance the carbs and then plug/cap/cover any your bike does not need.


« Last Edit: December 15, 2009, 09:01:18 PM by Mike on the Rock »
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iwantmore

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Re: carb boot trouble
« Reply #3 on: December 15, 2009, 10:18:02 PM »

i dont get what you mean mike?

the pic you have provided is the boot i was sent, doesnt fit >:( >:(

the boot on my bike says gv125 not gt250 like the one sent.

the boot on bike is very short and has 2 vent tubes right next to each other.

heres some more pics





does this mean i should ask richard to order me a gv carb tube?

meowmix

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Re: carb boot trouble
« Reply #4 on: December 15, 2009, 10:47:33 PM »

Thats curious. Where do the two hoses on that boot go? Interesting how neither of those pics are similar to yours.
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iwantmore

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Re: carb boot trouble
« Reply #5 on: December 15, 2009, 11:06:04 PM »

one of them connects to the other one on the front cylinder boot with a t connection, this then runs to the fuel pump.

the second one runs to the vacumme petcock on the tank.

i assume the other model bikes just have one hose from the front to the pump, and one hole on rear to fuel tank??

thats not my problem realy, if i try to fit the one i have it will change how the carbs sit. they will be higher at the rear than they are now, then i dont think i could fit my airbox on under the tank.

Mike on the Rock

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Re: carb boot trouble
« Reply #6 on: December 16, 2009, 06:19:03 AM »

I have not seen one with two coming out like that one?

The GV125 and 250 have deferent boots, much shorter that the GT boots.

What bike, year and what country, please/

on the hoses:

Early GV125/250 electric fuel pump, manual shut off valve, NO HOSE BIBS.

Early GT125/250/650 one boot with a bib, hose  to the fuel pump.

later GT125/250/650 two bibs, one each head one for the fuel pump one for the Vacume Fuel Valve.

The GV650 has any of the configurations????

Then we have several variants with one bib to the fuel pump and the other to the vacuum fuel valve and the Pair Pump(s)

Note that "T-ing" will mess up the fuel pump and the Vacuum valve, if you must "T" do it in the vacuum Valve side.

I do not know what the EFI system will use?

Also Some may be different, if so please describe and post the year, Country and model bike.
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iwantmore

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Re: carb boot trouble
« Reply #7 on: December 16, 2009, 07:04:34 PM »

alright took some decent pics of the problem today, tried to fit the new boot i was sent, but as expected it leaves a different angle for the carbs so i cant connect then to both boots.

while it was off the bike i took some pics for comparison, both boots are at same angles in all pics except the pic showing the bore difference.

because of the difference all i can determin is that both front and back carb boots are different between 125/250 machines, or the actual cylinder head is slightly different. Strange how it all looks the same but many parts are slightly different.

heres the pics (the original boot is on the left in all photos)







here you can see what i mean about having two pipe outlets, this "t" connects to both pipes and goes to the fuel pump. to second outlet is for the vacumme petcock.


this is what i have done to remidey it in the meantime, i have silicone sealed all the way round the outside and under the split. then filled the inside with some silicon and installed the carbs before it set, should hold up for now, not going to be using it really over christmas.

Mike on the Rock

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Re: carb boot trouble
« Reply #8 on: December 16, 2009, 10:45:45 PM »

YOU ARE CORRECT THE 125 ENGINE IS NOT THE SAME SIZE AS THE 250.

The GV farms is shorter and the air box is different so will require different boots from the GT frames.

Where did you order them from?
Did you tell them the Year of the bike and the model of the bike and the country you bought it in, also send them a picture showing the two plugs on the intakes.
« Last Edit: December 17, 2009, 03:13:21 AM by Mike on the Rock »
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iwantmore

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Re: carb boot trouble
« Reply #9 on: December 17, 2009, 01:14:28 AM »

it is from richardhyosung, i emailed him stating it was a gt125r uk (didnt tell him year :()

he then contacted hyo and they said they are the same as 250, so he sent me 250.

when i told him the problem he then contacted hyo who then changed there story, he has reorder me another (hopefully correct) part.

i sent him these pics today with every little detail about my bike to make sure hyo send the right one.

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