new main jets are different

**Fri Nov 11, 2011 6:43 am » Post: #1 » Download Post**

i just bought some main jets from tyga so i can get my wire splice done but the ones that were sent are a completely different shape to the ones already in the carb.the ones from tyga are short with just the main hole down the centre but the ones in my carb are much longer with small holes on the side of the jet aswell as the main hole through the centre.
Not sure if i have bought the wrong thing or if it is just a different design?

**Fri Nov 11, 2011 8:52 am » Post: #2 » Download Post**

Which bike?
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**Fri Nov 11, 2011 8:57 am » Post: #3 » Download Post**

The ones with the holes down the sides are the pilot/idle jets.

**Fri Nov 11, 2011 9:47 am » Post: #4 » Download Post**

its for a mc21,it has been a while since i pulled the carbs apart,i thought it was the bigger jets with the holes down the sides,my memory must be failing me.but the new main jets do look smaller than my current ones.i will have to take them apart and have another look

**Fri Nov 11, 2011 1:05 pm » Post: #5 » Download Post**

I have jets from 120 to 210, and none of them have holes in the sides.

The only thing with holes in the side is the emulsion tube...
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

**Fri Nov 11, 2011 1:38 pm » Post: #6 » Download Post**

Fovu, please feel free to contact me directly about this. I feel that you are describing pilot jets, not main jets.

The two types of jets control fuel flow at opposite ends of the throttle opening spectrum.

**Fri Nov 11, 2011 2:30 pm » Post: #7 » Download Post**

http://www.nsr250.net/forums/viewtopic.php?t=9052&highlight=float+heighth

Scroll down to the pictures. First picture: top jet is pilot / slow jet and has holes in the side. Middle jet is the main, and doesn't.
_________________
MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball

**Sat Nov 12, 2011 9:43 am » Post: #8 » Download Post**

thanks for the help,i think it is clear i have no idea about carbs.and dave i have stolen your photo so i can mark the parts,hope you dont mind.so the top jet(number 1)is the pilot,the middle (number 2)is the main so what is the one marked with a question mark?

**Mon Nov 14, 2011 6:04 pm » Post: #9 » Download Post**

1. is the pilot
3. is the main.

2 is not a jet you can change (I think its the feed up to the power jet...)
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MC21SP Plaything
BMW F800GS Bumblebee
Triumph 9551 Daytona Big boys toy
FJ1100 Sporting relic
GTS1000 oddball