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Hello everyone! I bought my 89 3MA a couple of years ago and I finally got it on the road last weekend. It came with the 70 CDI already in the bike but it does not have the SUGO two piece heads nor the pipes. I am trying to find more info about the CDI but nothing has popped up.
The bike is pretty much stock as the jetting in the carbs is stock with 180 MJ and 15 PJ but I took out the snorkels and removed the deiceing coolant tubes. The stock pipes only rev to about 10.5 with little over rev. I am thinking about throwing it on a dyno to see what it gots.

Hello MBsteve,

but it does not have the SUGO two piece heads nor the pipes.

Most likely you have a stock 3ma1 with a sugo ignition box.
The seperated heads are only on the 3ma4 (sp) models, and that engine does have a dry clutch to.

You can look on your pipes to see what types you have, somewhere in the midel you will see 3MA ore 3MA3 ore 3MA4
If you have 3MA pipes (most likely) then you could look if your pipes have the rings removed.

Also if you have removed the snorkels than you need to rejet ''180'' with removed snorkels is way to lean.
Take your time with the jetting a 3ma is easy to destroy with wrong jetting (don't ask me how I know that )

Last note
The ignition curve of a sugo cdi will be different to a 00 or 01 cdi.
A sugo cdi with stock pipes will not be ideal and will probably give to much advange for the stock pipes.
If you are not interested to get the last hp from your 3ma engine, perhaps you can score a 3ma 00 cdi or 01 cdi on ebay
It will be saver for your engine.

Let us now how it goes on the dyno

Its a good looking bike you have

Cheers

Yeah. Looks great.

Hi Guys;

I am not sure of my facts but I have read in one of the technical papers on the old forum that the 70 cdi is the same as the 00 0r 10 cdi. They only numbered then diffrently because the bike was sol in new zealand

Edd

Hi Guys;

Found the paper I am definetly getting old 00 new zealand 01 japanese and 70 sp model. Agree with Louis rather get the right part for the job 180 main jet will suggest a 00 cdi. I dont think their is one guy on this forum who havent scored a hole in one on a 3ma

Edd

Thanks guys!

This weekend I took her out for a ride up the mountains but I had to end it short as I still having fuel starvation problems on the freeway. When riding on the street I do not having any starvation problems. I took the gas cap apart to clean and inspect the passage way and today I will check if the petcock to see if it is flowing enough fuel. While riding I even switch over to prime and still having problems so that is why I am thinking it is the gas cap vent. I took the carbs apart to check the float level and switching up to 200's. I found out the Power Jets jets were clogged up solid as it took me a good half an hour to clean them out. I am not use to such a small Power Jets as I am use to running a size #60 not a #20 in my other bikes. This bike has not really been ridden for a good 10 to 15 years as it's previous home was in Yokohama. The last thing I want to do is putting a window into the top of the piston.

The bike is standard 3MA as the pipes are 3MA-and the part number. I have not checked if the rings were removed or not.

Hi

Most likely your starvation problem comes from the fuel filters situated inside the carb fuel inlets. They are small if you do not know about them you can easily miss them. They fit into the copper inlet pipes on the carburetors.

Edd

Thanks for the info. Most of the time I see those filters above the Needle and Seats but never heard of them under the brass fittings.

I am trying to get my TZR sorted out and also finish assemblying KAGE25X's 3XV for this weekend ride.

Thanks Edd for the heads up about checking the filters as they were full of crap and here is a pic of what came out of just one filter!



The flow of fuel out of the petcock is a lot better now so cleaning the gas cap vent helped. I also checked the float levels and they were both at 25mm and I reset them to 19mm. While I had part of the bike apart last night I checked the tops of the pistons through the spark plug holes and there was no signs of pittings so that is good.

That crap certainly would stop the flow to your carbs. Good you have cleaned them.

Something I'm thinking of.
Does your 3ma-70 cdi is connected to the airjet solenoids?

From memory the 3ma-70 cdi does not controle the airjets, and a fixed airjet is used.

Can you see if it is connected, ore do you here clicking if you play with the throttle?

Hi Louis, The 3MA-70 CDI is not connected to the air solenoids nor it is connected to the TPI switch. The CDI is not connected to the red plug on the main wire harness.

Does anyone know if there is a instruction manual for the 3MA Race Kit like the 2MA's and 3XV's?

Hello Steve,

Yes, that is what I thought .

Do you still have the air compensator's at the left side of the bike.
If you do. It could be a good idea to check the fitted airjets inside them
(if nothing is blocked, are they clean and if they have fitted the correct sizes)
Remember only the middle one is open, when the cdi is not controlling them.

You could made a small mod, with a fixed airjet like this.

Small hose and in the end, a end plug cap (the airjet fits right in)


Just a idea

Let us now how it goes

Cheers

or use a stock cdi!

IMEEDU?

Hello Steve,

Think it will be my limited English, but what do you mean with

IMEEDU?

Louis wrote:Hello Steve,

Think it will be my limited English, but what do you mean with

IMEEDU?

It is the Japanese writing in the picture

イナ -ジ 2?

You read Japanese

Thats great

Always wanted to know this part


What do they say? Something with dimensions and tz250 88

My Japanese is very limited as I am learning it. It is basically saying that the 88 TZ250 exhaust system is a desired system and it is used on the TZR250. The straight exhaust is design for maximum performance. Then it talks about the measurements of the TZR pipe. Lastly it talks about the design of the silencers as it is the optimal design with the louvers to reduce the noise but not reducing performance.

Thanks fore the translation, I appreciate it.

Think Japanese is a difficult language to learn, respect that you learning it

How is it going with the 3ma

Yes, Japanese is difficult to learn and when I have trouble then I ask my wife.

I took the bike out for a long ride yesterday and it ran a whole lot better. I put on about 120 miles on it and I got it up to about 145 Kph but I didn't want to push it that much more. I am thinking of going to up the main jets to 210's to get more rev out of it or increase the power jets. I need to work on the handling as it steers a little slow. I don't know it is because of the stock size rear tire or not.