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FUEL PUMP, 3.5 BAR STABLE (MSX GROM125 SF ('17- ) | MSX GROM125 ('21- ))

YUMINASHI FUEL PUMP, 3.5 BAR STABLE (GROM125 SF ('17- ) / MSX125 SF) ('17- ) (16700-K26-B01R)

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  • YUMINASHI FUEL PUMP, 3.5 BAR STABLE (GROM125 SF ('17- ) / MSX125 SF) ('17- ) (16700-K26-B01R)
YUMINASHI
₩241.805,52
SKU:
16700-K26-B01R
Weight:
500.00 Grams
Availability:
Fast moving item, ships the next day (Except on Sundays & Thai public holidays)...
Shipping:
Calculated at checkout
Minimum Purchase:
1 unit(s)
Buy in bulk and save

 Product Description

buying-2-discount-300pxl-.png● FUEL PUMP 3.5 BAR STABLE (50.76 PSI) (MSX125 G (2016-) | MSX125H_A (2016-) | GROM125 SF (2016 - 2021) | MSX125 SF (2016 - 2021))

● This 3.5 bar (50.76 psi) stable fuel pump is really a must if you are thinking big bore, or engine swap to handle in an optimal way the pressure required at wide open throttle in combination with a large flow injector for a big bore kit, or with an engine swap like a CBR250R or CBR300R.

● The stock pressure on a brand new 125cc bike is 3.24 bar which is 47 PSI, which from then on only goes down depending on how many kilometers or miles you drove with that fuel pump, and how hard that fuel pump had to work in that period of time.
Honda recommend to replace the fuel pump on a 125cc engine at the moment you have reached the 39 PSI mark which is 2.69 BAR.

This however are recommendations for the stock 125cc engine with the stock 90cc/min. flow injector installed.

※ Can only be installed in the 2016 and onwards MSX / GROM types with the fuel pump mounted on top of the fuel tank, and can not be installed at the older types with the fuel pump below on the fuel tank, so please check before you order...


● We see that the Honda engineers have decided to install a higher pressure fuel pump on any motorcycle or scooter which has an injector installed basically above the 200cc/min flow mark (A higher pressure fuel pump was even installed on the stock CBR150R which runs a 6-holes 175cc/min injector from the factory).

If you install a high flowing injector in combination with a 2 valve or 4 valve head on your big bore or engine swap with let's say a stock CBR250R 12 holes Denso 260cc/min injector, or even a 235cc/min FORZA300 10 holes B-type injector, then we recommend to balance your fuel injection system out based on at least the stock specifications of these bikes to benefit reliability, performance and fuel economy.


● Something to keep in mind is that the larger the injector, the harder the stock 125cc fuel pump need to work, and the larger the pressure drop will be at wide open throttle if you don't upgrade the fuel pump.

The reason why Honda is installing by default a higher pressure fuel pump is to implement a margin, and to allow the pressure going down at WOT to keep the pressure up to at least 3bar which is the pressure on a stock 125cc bike at wide open throttle with a 90cc/minute stock GROM125 injector installed .

Typically we see a drop of 0.2 BAR (2.9 PSI) on a 125cc engine at wide open throttle, which means that your engine will lean out at wide open throttle. 
If your fuel pump has some kilometers or miles on it, and if your voltage of your battery is below 12.3 volts, then it only get's worse (we even don't talk about using high flow injectors in combination with that same 125cc fuel pump then)!...


● High-pressure injection delivers power and fuel consumption benefits over lower pressure fuel injection, by injecting fuel as a larger number of smaller droplets, giving a much higher ratio of surface area to volume.

At the moment you install the Yuminashi 3.5 BAR stable fuel pump, then you will see that your bike will start to run richer even if you didn't changed the fuel injector, and this even in combination with a large FORZA300 10 holes injector, or a 12 holes CBR250 or 300 fuel injector installed.

If you have experience with engines and engine sounds, then you will even notice that the sound of your engine has changed after the install... 

※ Yuminashi used to make these fuel pumps only for some racing teams around the world, but since more and more non professional customers are asking for a solution of the fuel drop we are introducing this product now also on our direct sales store.    

budget-logo-2.png SMART SHOPPER TIP:

       ※ BUYING MORE THEN 1 PIECE CUT THE TRANSPORT PRICE, AND YOU RECEIVE A 10% DISCOUNT ON TOP OF IT!
       
   ※ B2B:  

  • Purchases between 2 & 4 pieces of this product will receive a 10% DISCOUNT 
  • Purchases between 5 & 9 pieces of this product will receive a 15% DISCOUNT 
  • Purchases between 10 & 19 pieces of this product will receive a 20% DISCOUNT 
  • Purchases between 20 & more pieces of this product will receive a 25% DISCOUNT 

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