Yamaha durability

[Yamada]

Today I performed a compression test on my ytm-200. Take note that this engine is all original: ring, piston, head gasket, etc. After a couple pull of the rope I read the gauge and i was shocked. The engine had 155 psi of compression. Not too bad I guess for a 24 years old engine. I looked for my service manual to see the service limit but I didn't locate the book in the garage:mad:
Who else have an original trike engine and what is the compression??? Let start a compression war:naughty:

[motoman110]

Yamaha? durability? thows two words shouldn't ever be used in the same sentence! ahaha just kidding! But that's pretty good tho.

[Brockey]

Thats good numbers no doubt. Where I am from we call the 200 yamies, "yellow hammers". I never had much luck with my 250 moto 4 but those 200e's. I know one that has gone thru about 10 owners and everything is destroyed on it but it runs like a new machine. The bike has been rolled crashed into a guardrail and much more. It wont die and the motor has never been touched. I am thinking about buying it and rebuilding the bike around the motor. It is painted a dozen colors and 3 odd tires, duct tape seat, but its reliable.

[Yamada]

Thats good numbers no doubt. Where I am from we call the 200 yamies, "yellow hammers". I never had much luck with my 250 moto 4 but those 200e's. I know one that has gone thru about 10 owners and everything is destroyed on it but it runs like a new machine. The bike has been rolled crashed into a guardrail and much more. It wont die and the motor has never been touched. I am thinking about buying it and rebuilding the bike around the motor. It is painted a dozen colors and 3 odd tires, duct tape seat, but its reliable.

This trike is kind of neighbour wh@re!!!!!! Everybody has lay himself on it :lol:
Hint for the engine to last, use 15W40 diesel engine oil. That's what we always used.

[YTM 225dx]

You use 15w40 on it! How come i have a 225dx and was wondering why you think that oil is better, i might have to try that. But isnt it too thick for these engines.

[Yamada]

You use 15w40 on it! How come i have a 225dx and was wondering why you think that oil is better, i might have to try that. But isnt it too thick for these engines.

Yep, 15w40. Do you have winter in Illinois? If I let it outside during winter it is a real pig to start.:rolleyes:
I think the manual call for 20w50 under certain temperature...
We use this weight of oil because we have 5 tractor and a pick-up and we buy oil by the barrel ( 55 gallons???)

[mark38090]

I have 2 85 ytm200's. 1 has 145 the other 149.

[Yamada]

I have 2 85 ytm200's. 1 has 145 the other 149.

Do you know if the engines had been rebuilt?

[Mr.Jake]

just checked mine and its about 165, but it has been bored and a wiseco piston thrown in and some boyeseen power reeds (dont know if this would affect it)