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Old June 1st, 2023, 12:32 AM   #3
DannoXYZ
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Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011

Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C

Posts: A lot.
MOTY - 2018, MOTM - Nov '17
'86-87 1st-gen is completely different than '88-07 pre-gen or '08-12 new-gen.

If you swap engine to any other generation, you'll also need these parts that goes with engine:

- matching upper engine-mounts, also supports different radiator for each generation
- matching engine-harness and sensors
- matching ignitor box, '86-87 uses different analogue ignition system
- matching carbs, each of these 3 generations uses different carbs
- matching exhaust system
- matching dash, tach won't work

Same with 300, need entire EFI system too. Otherwise, you'll be spending A LOT of time dyno-tuning 300 engine with carbs that were never designed for it.
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