Need Your Help To find out what size Motor I have..

[Tady2blue]

Her are some pic of the motor, that came off my uncle bike . He gave it to me about 20 yrs ago. The bike was a chopper. I've been on this site and have seen the nice bikes , so I decided to try and restore the bike and motor if possible. The number on the motor that I have seen are, R1-08157, and under the case it has 7683, and on the back of the motor it has 151. What does all this mean. I don't have the frame right now so I don't have the vin #. All help would be greatly appreciated.

 

[sgallaty]

You should find the nominal displacement stamped on the back of the cylinder head.

 

[Ironsled77]

Holy wow! Thats not an xs motor......I dont know what it is but a guess would say a very old 1000.....

 

[The_heartbreak_kid]

Just a guess but it looks like one of those motors they put in the CS3's from the sixties. I think a lot of those bikes were in the 200-250cc range. Not a definitive answer but maybe a good place to start looking into.

 

[highspeedhamish]

That be a 1970 Yamaha YCS1-C 180 CC....

 

[Patches]

^ Winner!

I believe this motor was the predecessor to the RD motors. However I know nothing about them.

 

[jayel]

Think it's a 350 cc the 180cc was a S1

http://cyclerestorer.com/pages/show_man_serial_num.php?sort_field=4&manufacturer=Yamaha

Year 1967, Model YR1, CCs 350, # of Cylinders 2, Tank_Color Candy Red, Engine Number R1-00164--12021, Frame Number R1-00164--12021

 

[Ironsled77]

Ha I was way off! Tried to cheat n took the r1 as a 1000

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[CDNTX650]

anyone who knows bike SHOULD have known thats a 2 stroke.....

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[Newagerocker]

That's a small displacement two stroke boat anchor ain't worth the trouble.

MO

 

[CDNTX650]

pffft. i have an rd350.....that "boat anchor" is hella faster and handles better than my xs650...

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[Newagerocker]

I don't doubt that yours is faster and handles better than... But yours runs; I'm thinking that one DON'T! A much more loved project might be a better choice unless he has a pile of obsolete/unobtainable parts for restoration.

 

[CDNTX650]

haha, ya i guess.

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[pregrid]

looks like a medium..................

 

[Tady2blue]

Thank for all the info, It is a 1967 YR1 350. Just for the record, I do have all the parts and the bike that it came with . Just looking for another project beside the 30ft cabin cruiser I've have been working on. Thanx again. P.S I already have two anchors thank u...

 

[Tady2blue]

Thank u 4 ur help, much needed.

 

[Purplezinger]

Her are some pic of the motor, that came off my uncle bike . He gave it to me about 20 yrs ago. The bike was a chopper. I've been on this site and have seen the nice bikes , so I decided to try and restore the bike and motor if possible. The number on the motor that I have seen are, R1-08157, and under the case it has 7683, and on the back of the motor it has 151. What does all this mean. I don't have the frame right now so I don't have the vin #. All help would be greatly appreciated.

I think it's a YR-1 I believe they were 350 cc. YR-1 were the predecessor of the RD 350's If it is that would place it in the late 60's to early 70's. I remember them being very fast.