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Discussion Starter · #1 ·
I have a stroker / big bore= 780cc with a stage 3 cam. What size of injector should I upgrade to?
 

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You might need a 650-750 injector. You should contact Geisick Performance and they will put you very close. They sell injectors on Ebay. I used them in the past for both YFZ450r's and Raptor 700's. Geisickperformance.com
 

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Discussion Starter · #3 ·
You might need a 650-750 injector. You should contact Geisick Performance and they will put you very close. They sell injectors on Ebay. I used them in the past for both YFZ450r's and Raptor 700's. Geisickperformance.com
Perfect I will give them a call thanks. Did it make a huge difference upgrading ?
 

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I am not going to say it made a huge neck twisting difference but the bike definitely ran smooth thru all the ranges and kept pulling on top end. If you are in tune with your bike you will feel a difference. With the mods you did already it’s worth it.
 
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