Hi all,

Long story short, I seized my top cylinder then rebuilt both top and bottom.
I screwed in the air screw on the top a 1/4 turn and left the bottom as the bottom is running fine. The spark plug on the top cylinder is a little reddish brown which tells me it is lean still.

I have a sticker on one of the fairings which is mostly in japanese except for the spark plug codes which is english. Now I was too busy stuffing around in japanese class to learn anything but at a guess it looks like it says to have a BR10ECM on top and a BR9ECM on the bottom. Am I even close on this?

I was just guessing that the top may be a little too hot of a spark plug.

I would send a photo of the sticker but I am a crane operator and the only computer I can competently use is the ones in cranes.

I am praying someone else has the same sticker.

Cheers all in advance.

Andy.

As atandard,they run BR9 ECM in top and bottom.

Check out http://tech.nsr-world.com/ for carb set up if you're worried a bout it running rich/lean.

Good luck

The bike is standard. I even reversed the wire splice. The old girl had 30,000 k's on it with the original pistons in it. I might strip and clean the oil injection system to see if it is a little blocked.

It just seam a bit strange that it has made it so far and then I buy it, thrash it and then all this happens.

I guess it's like you all say.
"It's a learning curve".

Cheers again.
Andy.

P.s. I can't believe you are not allowed to marry a web site because I love all you guys.

To check oil injection pre-mix some fuel take of oil injection pipes block them of put hoses on oil injector into container run bike ,you can go for ride but i just turn oil injector on by hand and see if oil is pumping.
The specs on here run same plugs front and rear.
was the cylinder heat seized or seized from lack of oil somtimes you can tell by the look of them

It says;

Only use
BR10ECM BR9ECM
W31EMR-C W27EMR-C
use of any other type of sparkplug may damage the engine.

Cheers to my sister for the translation
_________________
Please do not PM me technical questions, if you can't find it on the Forum start a thread

Cheers again all,

When I bought the bike it was running mineral based oil and had the wrong spark plugs and also had a galvanized plate head gasket with no holes for water flow. I found out the wrong plugs were being used after the seizure. The top cylinder was running lean which was the main cause ( and probably a blocked oil tube). What little spark plug that was left was white. The bottom looks perfect, even the piston looked good for 30,000 k's.

I might rip all the oil injection out and run pre-mix.


Cheers again.