Engine ID from serial number

Hi all

Just picked up a 600 engine for the 550 project which I hope to start in the next few weeks. Serial number is 1UJ-004621. Can anyone tell the year/bike this is from ? I was told it came off a XJ600 but I'n not sure it wasn't a Radian..

Cheers

JS

 

According to Wikipedia, 1UJ is for a Radian, but I'm not positive on the exact year.

 

That is indeed a Radian motor, 1UJ for the YX600S; 1UL for the "California" spec YX600SC. The actual model year isn't all that important, and can probably be calculated from the serial number. All 1UJ's are gonna be essentially the same regardless of what color they came in.

It really doesn't matter, PHYSICALLY, as in motor mounting, etc.; whether it came from an XJ, FJ or a YX. The Radian used the 550 Maxim frame. It will bolt up.

Your potential pitfalls would be carbs, ignition, and the good possibility that the charging system is of a completely different design.

 

Ah - 'b*gger' ! I mean thanks for the info..

I presume that the XJ/FJ 600 would be a better choice for the swap then ? or is it likely (just) a case of changing electrical connections either way ?

Luckily I only gave 50 quid for it ( +30 for some carbs of uncertain vintage..48mm at bell mouth and 32mm 'output' )..

Cheers

JS

PS Any idea what the leading three characters of an XJ/FJ600 engine should be ?

 

OK update.

I learn from the mighty web that the Radian used 30mm carbs and not 32mm as the man 'kindly' sold me which I guess means the intake rubbers will be all wrong. Hmm

NO matter another (600) engine is on the bay right now and only 50 mile away the guy says the serial number is 510-052036 but I'm not sure that sounds right either..

Have also found Radian wiring diag that I will compare with the 550 when I get home..

What larks eh ?

 

from my Haynes,

1uj ---------yx600 radian ----------1986 and 1987
51j----------xj600 ----------1984 through 1987
3km1-------xj600 ----------1989
3km3-------xj600 ----------1990
3km5-------xj600 ----------1991 and 1992

2wy yx600radian------------1988
3lt1---------yx600radian------------1989
3lt3---------yx600radian------------1990

I also have lists of fj600, fz600,and the extra California models, that supplement the above , if you need them.
stu

 

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NO matter another (600) engine is on the bay right now and only 50 mile away the guy says the serial number is 510-052036 but I'm not sure that sounds right either..
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no that number wouldn't be right
its probably a 51j, 052036 would be 1989
stu

 

Hi Stu

Thanks - 51J seems most likely - if it goes for not much money I can have a stab at making one from two I reckon..

Cheers

JS