Kymco ZX50

[Shaka]

They make them.  I just haven't found anywhere to get them.  The company is in Spain, and I don't speak Spanish, I don't think they speak English.  I kinda gave up looking.  I got it tuned pretty well.  I just think I could get it a little bit better with a different needle.

[sidthesloth]

Sounds like the problem I had with the carby insulator, no one was interested, so when I suggested to ring Kymco in taiwan my wife said "you don't speak taiwanese", I figured she had a point so I didn't ring. When I rang Kymco Australia they said "you need to go to a dealer". Hmm, find a dealer who is bothered with something under $100. It did work out eventually, (10 months).

[zombie]

I found the same thing after months of searching for parts... If you contact the original supplier of the parts, they can understand enough to make a sale.

[sidthesloth]

G'Day again blokes, I haven't been doing anything with sid today as am waiting for the exhaust to turn up. The email I got from the cylinder supplier said to mix oil to fuel at a ratio of 300cc oil to 1000cc fuel, that sounds like too much oil to me. At 20:1 it is 50 ml to 1 litre. Have I missinterpreted something?
Cheers,
Rob.

[axy]

G'Day again blokes, I haven't been doing anything with sid today as am waiting for the exhaust to turn up. The email I got from the cylinder supplier said to mix oil to fuel at a ratio of 300cc oil to 1000cc fuel, that sounds like too much oil to me. At 20:1 it is 50 ml to 1 litre. Have I missinterpreted something?
Cheers,
Rob.

I am not sure what you are talking about (did not follow this thread), but if you are asking how much oil goes into gasoline for 2stroke scooters, it is usually 2-4 %, so that would be 20-40 cc per 1000 cc of gasoline.
Why are you worrying about that, don`t you have automatic mixture?

[sidthesloth]

G'Day axy, with the cylinder upgrade to a 50mm piston the oil pump does not supply enough oil, so I will be premixing.

[axy]

G'Day axy, with the cylinder upgrade to a 50mm piston the oil pump does not supply enough oil, so I will be premixing.

I know that performance 2st engines have higher ratios.

"Most tool, transportation and recreational requirements, such as golf carts, motorcycles, snowmobiles, blowers, chainsaws, tillers, rotary plows, utility tractors, commercial two cycle carts, garden tools, motor scooters, motor skates and other two cycle engines are in the range of 20:1 to 80:1, gas to oil. Many motorcycles are 32:1, others are 40:1 and still others are 50:1. If you are uncertain, consult your owners manual."

[Shaka]

I premix (currently with BelRay H1R) at a ratio of about 37.5:1 - 40:1.  I mix between 16 - 17 oz in 5 gal.  I have a 16.9 oz water bottle I fill up and mix in a 5 gal gas can.  I make sure I put exactly 5 gal in at fill up.  I also mix in .5 oz of Sta-bil marine formula in the 5 gal.  I don't know how many cc's are in a gallon off hand, but 300 cc: 1000 cc is too much.   

There are 128 oz in a gallon.  Multiply by 5 = 640 oz in 5 gal.  640 oz divided by 17 oz = 37.65 : 1
640 oz divide by 16 = 40 : 1

1000 divide by 300 = 3.33 : 1  = Too much!

[sidthesloth]

Thanks shaka, I thought it was too much. I thought 20:1 would be good to start with until all sorted. sed I have a lot to learn

[zombie]

I think the "recommend" is for break in. That I believe is where all the gen. consensus is. After that I think it is up to what the main bearings need more than cyl. lube.

[Shaka]

I've never heard of anyone going more than 30:1 - 35:1. I don't think you want to overdue it on the break in also.  You want the rings to be able to seat properly.  The same principle as not using full synth. on break in. 

[zombie]

The bottom line is: What works where you are, may not work here. I rode Potato fields all year round on Long Island N.Y. In the summer I would mix MUCH richer because of the dust. Winter was supper tune time because of the dense air. There are lots of routes to the same goal. Combustion temperature. I generally run 40:1 as a base for all 2t engines.

[sidthesloth]

Ok, thanks for that, I will mix my first 10 litre batch at 35:1 for a start and go from there.

[zombie]

I just re read my last posts. Sounded snoty to me. Sorry guys.

[sidthesloth]

Nah mate, you're good, I do appreciate all the help.