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Makotosun

help needed with a yl2

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help needed with a yl2 was created by lewy

question on the oil delivery pump, is there a spring or check ball in line from the pump and intake
and another question on transmission oil- anything special here or can I use any wet clutch motorcycle oil?  anybody now the amount of oil in these,  no window or dipstick asking because i am getting alot of oil in exhaust pipe, was working on a bogging out situation when I put it back together   cant rev up went through carb  float level, needle settings, plug getting soaked dropped head pipe and had some oil wetness think I put in like 20 ozs of oil in trans, but that I dont remember exactly, I work on it one day and be gone for a few days  
31 May 2022 19:32 #1

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Replied by RT325 on topic help needed with a yl2

Yes from the pump where the line goes to the rotary valve. No5 in a similar rotary valve L5TA 100 motor. Might be a filter in the oil tank attached to the union if it screws out. Shows one on the L5. Did you get it to rev out fully. Have you tried it with the exhaust header undone or at least very loose to see if it clears. Yep it'll be noisy.
www.partzilla.com/catalog/yamaha/motorcycle/1970/l5ta/oil-pump
www.partzilla.com/catalog/yamaha/motorcycle/1970/l5ta/oil-tank
31 May 2022 20:39 #2

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Replied by Ht1kid on topic help needed with a yl2

On the L5ta number 21&22 is the ball and spring for the oil pump must have it or oil will drain in your crankcase
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31 May 2022 21:34 #3

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Replied by lewy on topic help needed with a yl2

no it would never rev out just bogs like flooded, I have no spring or ball in line with pump, took off to flush with new oil as well as the tank.. bike was sitting for a long time   no it would never rev out just bogs like flooded, I have no spring or ball in line with pump, took off to flush with new oil as well as the tank.. bike was sitting for a long time    no it would never rev out just bogs like flooded, I have no spring or ball in line with pump, took off to flush with new oil as well as the tank.. bike was sitting for a long time   no it would never rev out just bogs like flooded,  when I first got it, I got it started before taking apart it would try to rev up then with/ before carb cleaning new plug etc  I put alot of time and parts in it and I will get it figured out, and will take all help that offered. Yes the mouse urine rotted regulator  and full wire loom replaced   thanks 
01 Jun 2022 15:45 #4

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