Forums 🚥 PIT STOP 🔧 Hyosung Technical Help How to change Vacuum Lines on Hyosung GT125R GT250R & GT Comet (Air Hose Diagram) Reply To: How to change Vacuum Lines on Hyosung GT125R GT250R & GT Comet (Air Hose Diagram)

#6756
♠️ MARCEL
Admin
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Nov 30, 2017
@mf448kxn6
North UK
GTR

hi, so my bike got 1 rear intake hole, 1 front intake hole with rear pump and vacuum fuel tap. how can i apply this method? would appreciate much if could help me.

Hey its OK. Front intake pipe = fuel pump. Rear intake pipe = vacuum tank tap. Only GT250R & GT250 Any 125 owners should follow the original topic at the very top above ^^ Hope that helps.

I have an 08 GT125R with only one hole in both the front, and only one in the rear intake manifold. Would this work for me too? Cheers!

Hey, I don’t see why not 🙂

For optimum performance of the vac system why not do it like this …..

Front Intake ==> T Junction (Plastic or metal) <=== Rear Intake.

The see the 3rd hole of the T Junction?  Do this …..

TJunction ==> long hose to rear of bike ===>  SECOND JUNCTION

 

SECOND JUNCTION ==> Feeds Pump and Vacuum Tap.

 

 

In other words,  you just get yourself  2 junction parts so that front & rear intake both feed the vacuum of the pump and the tap. Since the pump likes it when it gets vacuum from both cylinders of the 125cc

 

250 doesn’t matter too much since 1 cylinder does enough ,  but  1 cylinder can also work for 125 , just not optimally in some situation.

Let us know how you get on or if i have confused you in anyway, ask and i will clarify again…  🙂

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