schumi
L plate rider.
Posts: 12 
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Post by schumi on Jun 28, 2013 20:40:08 GMT 1
Hello everybody,
I'm Michael, 21 years old and live in Germany. About a month ago I bought a RD 125 LC MK1 (German version, so it's a 10W), which I check now for problems. Hope you guys can help me with some of them.
1.) Recently, I wanted to change all fluids, but I had problems with the transmission oil: There was only about 250 cm³ oil in the gear chamber, when I removed the drain plug. When I filled the new oil into the engine, there fitted again only 250 cm³ until the level window said there is enough oil inside... Should I just fill the correct 550 cm³ of oil in it and wait/run the engine or could there be anything else wrong inside the engine?
2.) The carburetor seems to be a wrong one... It is marked as "11Y-00". Does anybody know if this is the right one for the German variant?
Greetings
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Post by noelrdlc on Jun 28, 2013 21:22:58 GMT 1
The carb on your bike is correct this carb was fitted to some German bikes in fact I have one myself, To answer your other question you should put the 550cl of oil into it.
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schumi
L plate rider.
Posts: 12
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Post by schumi on Jun 28, 2013 22:27:06 GMT 1
Thanks for the fast answer! Do you have the jetting for this type of carb? If not, can you check yours and tell me the jet sizes?
Greetings
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Post by noelrdlc on Jun 29, 2013 9:28:30 GMT 1
When I bought the carb it came with a 155 main jet. I have replaced that to a 170 main jet as I have changed the pipe reeds etc. I find my bike is a lot faster on the 11y carb than the 10w or 12a and would recommended that carb to anyone. What jet is in yours ?
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schumi
L plate rider.
Posts: 12
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Post by schumi on Jun 29, 2013 20:40:31 GMT 1
There was a 140 jet installed, with that the engine just turned till 8500 RPM, maximum speed 115km/h. I replaced it now with a 155 jet, I'll report the differences.
Greetings
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Post by looey on Jun 30, 2013 8:27:24 GMT 1
When I bought the carb it came with a 155 main jet. I have replaced that to a 170 main jet as I have changed the pipe reeds etc. I find my bike is a lot faster on the 11y carb than the 10w or 12a and would recommended that carb to anyone. What jet is in yours ? Funny you say that..... I've got a matching numbers MK1 10W bike and I've got an 11Y carb fitted with a 170 main, std airbox (with Pipercross element) and Micron pipe and it goes better with the 11Y carb than either a 10W or 12A carb (both jetted correctly obviously)  |
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schumi
L plate rider.
Posts: 12
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Post by schumi on Jul 26, 2013 15:30:07 GMT 1
So, after a long time test with the 155 main jet, I have to say that I couldn't notice any differences to the 140 jet... Engine still revs only to about maximum 8500 rpm, after 7500 rpm it's loosing power dramatically... I made a power measurement in 2. gear, picture of it is in the attachment. The engine's fuel consumption is high too, it takes 5L/100km, these are approx. 56 mpg, without tuning parts. I read it should take about 76-79 mpg... What could there be possibly wrong with the engine? Maybe these two problems are connected? Maybe the piston and/or the rings are worn-down because they rattle at certain revs? Greetings Attachments:
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schumi
L plate rider.
Posts: 12
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Post by schumi on Aug 6, 2013 20:54:56 GMT 1
Anybody who knows what I should check when the engine looses power in high revs?
Anyways, how do I remove the silencer in a std MK1 pipe?
Greetings
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Post by museumman on Aug 7, 2013 11:18:53 GMT 1
Anybody who knows what I should check when the engine looses power in high revs? Anyways, how do I remove the silencer in a std MK1 pipe? Greetings 10W pipe with welded in baffle? You will have to grind away the weld near the end. |
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