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Why 4th gear pull?

XR650R

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#2
4th is the closest to a 1:1 drive, so it's the most accurate for measuring actual power at the wheels. Of course, you get going quite fast doing that, so it's not really safe on public roads.
 


Lays

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#3
My tuner had me switch because 3rd gear was going to spin when we started turning it up.
 


Dpro

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#6
My tuner had me switch because 3rd gear was going to spin when we started turning it up.
Yup we have the same tuner. I was doing 3rd gear pulls on pump gas with my S280 and was at the bleeding edge of tire spin . I am about to start tuning for E30 and he will probably tell me to switch to 4th gear pulls as I am sure I will have tirespin in 3rd. :LOL:
 


Lays

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#7
Yup we have the same tuner. I was doing 3rd gear pulls on pump gas with my S280 and was at the bleeding edge of tire spin . I am about to start tuning for E30 and he will probably tell me to switch to 4th gear pulls as I am sure I will have tirespin in 3rd. :LOL:
Weird, I only experience spin in part of second gear on pump, on e40 it'll definitely light em up thru all of second and some of third, lmao!
 


haste

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#8
It also puts a heavier load on the engine than 3rd gear which gives better engine data for the tuner.
 


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