need help finding engine size

[thecrew2999]

i recently got a yamaha biek that is a frame, engine, trans and electrical. missing body parts and tires.

i need help to find out what size engine it is and all and hoped someof you could point me the right way.

it is a 4 cly with YICS on the heads, shaft driven and appears to be a 80's bike but that is completely unsure.

i am missing the carbs so ill probley need to get a set of them as well.

i do know the instrument cluster has a 80 mph top speed on it and the tach red lines at what appears to be right around 9 k

also has a few lights in the middle for different functions.

i tried searching by the model number i found on the forks which is

JYASN800 (long space) A022740 but i found nothing and im not sure where to put it all in like a site.

im using this engine for a go cart project and i need the info on engine size for a few mods and to order parts that are missing.

has accel coil packs and 32k miles on it so i figured just wore in.


i know a lot about yamahas (hell i even own a SHO) but i dont know anything about these bikes.

thanks guys

[Snow]

Look on the top back of the motor near the middle right before the frame comes up behind it. Should see the cc stamped in a rectangular plate. Sounds like an XJ with the YICS on it.

[thecrew2999]

where can i find performance parts for this also? if this is olny like a 650 id like to get a big bore kit and some bigger jets, what not for some serious power

[Snow]

It depends on what it turns out to be. What do you mean by performance parts? Bore kits, carbs kits, etc?

Just a guess, but I'm betting it looks like this:

[thecrew2999]

i mean big bore as in boring it out and raising the CC so it makes more power, the carb jets i guess as i read really wae up these engines.

yeah ill find out and get back on once i know.

to be honest i cant tell exactly what it looks like since there is no body panels tires, lights or any of that. just frame engine and wiring including gauges.