1989 FZR400 Engine swap from 1995 FZR600

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kcallowai
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1989 FZR400 Engine swap from 1995 FZR600

Post by kcallowai » Sun Jul 14, 2019 4:07 pm

Hi All!

I decided to pick up an 1989 FZR400 as a project bike...I just love the small bikes...and..well Im short too.

I just picked up a complete 1989 FZR 400 to work on, but it came with a parted out 1990 FZR400 and the 1990 frame is still registered here in CA so Im considering an FZR600 engine swap to resurrect this little guy as well. I can pick up a VGC 1995 FZR600 with no title very reasonably.

Sooo, my questions are how easily will the 600 motor mate up with the 400 frame...and what is the best course of action with the rest of the 600?...use most of the 600 on the 400 frame or ??

Thank you in advance

Evilchicken0
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Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
Location: Lundin Taan
Re: 1989 FZR400 Engine swap from 1995 FZR600

Post by Evilchicken0 » Sun Jul 14, 2019 8:17 pm

Ok so usa bikes are slightly different to models and years we have here. California also got the SAC which is close to the 3en2 it has an EXUP. Have a look at the frame I'm guessing has frame rails and the engine has mounts at the front of the gearbox ???
The 600 / 400 engines have common cases the 600 is just a longer stroke. Good news it will bolt straight into the 400 frame.
You'll need the 600 down pipes, the cdi and clocks are good due to the 600s lower red line and mph speedo. The carbs would useful although the 400 are same they would need retuning.
The radiator fan fouls the top of the down pipes, some put the fan on the front with the impeller turned to push air. Some respace the rad, some use computer fans.
The 600 being taller puts the carbs and therefore the airbox higher - space the tank cover up by about 20mm.
You might need a different link pipe for the exhaust can.
Dyno tune it after
That's it ... easy conversion

kcallowai
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Re: 1989 FZR400 Engine swap from 1995 FZR600

Post by kcallowai » Mon Jul 15, 2019 3:52 pm

Thank you!

both bikes are 3FH.

Let the madness begin...

Evilchicken0
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Re: 1989 FZR400 Engine swap from 1995 FZR600

Post by Evilchicken0 » Mon Jul 22, 2019 6:30 pm

Cool :grin:


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