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Jetting for Fj1200 with Wiseco 81mm big bore motor

Started by Inps, September 11, 2025, 05:56:51 PM

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Inps

Hi Does anyone have any suggestions on jetting for a wiseco 81mm 1314cc motor
  Thanks

Millietant

It all depends what you've done with your intake and exhaust systems as well. With a full list of what mods you've done, someone may be able to help with a starting point.

Or possibley, contact RPM (Robert/Randy) directly.
Dean

'89 FJ 1200 3CV - owned from new.
'89 FJ 1200 3CV - no engine, tank, seat....parts bike for the future.
'88 FJ 1200 3CV - complete runner 2024 resto project
'88 FJ 1200 3CV - became a race bike, no longer with us.
'86 FJ 1200 1TX - sold to my boss to finance the '89 3CV I still own.

Inps

IT has a stk exhaust, stk carbs, k&n air filter and wiseco 1314 pistons

also has anyone replaced the rear calaper with someting different with the stk bracket