This Is The EPIC Soggs 92K75 MAGA Thread

[Soggz]

Ok.
New boots on, no leaks I can see.
New plug, full battery, compression is great, fuel getting through,big spark, cranks over but won’t start.
Fuel getting through as sparks are wet.
Not sure what next(?).

[Martin]

How wet are the spark plugs, a faulty temperature sensor or temperature sensor connection can cause problems with flooding the engine. Remove the fuel pump fuse #6 marked Kraffstoppe and see if it will fire up. It should fire on the residual fuel left in the combustion chambers. You can also try to ram the fuse back in as it starts to die, but you will have to manipulate the throttle to keep it running.  There are procedures for testing the temperature sensor on this site.
Regards Martin.

[Soggz]

How wet are the spark plugs, a faulty temperature sensor or temperature sensor connection can cause problems with flooding the engine. Remove the fuel pump fuse #6 marked Kraffstoppe and see if it will fire up. It should fire on the residual fuel left in the combustion chambers. You can also try to ram the fuse back in as it starts to die, but you will have to manipulate the throttle to keep it running.  There are procedures for testing the temperature sensor on this site.
Regards Martin.

Thank you.
Will give it ago tomorrow.

[Soggz]

Good spark for all cylinders?

Plugs fully pushed on?

FI unit plug fully pushed on?

Kill switch off?

Neutral light on?

FI relay?

all these seem ok, not sure about relay.How would I know if faulty?

[Soggz]

Actually think of the tasks you have done since it last ran, the problem is probably in one of those.

Hi.
The only thing I’m not sure about is the TPS, as I undid it to clean the muck out from around it. When I repositioned it, I made sure it clicked just as you open the throttle and clicks as it goes to fully closed.

[The Mighty Gryphon]

I tAke that back it's unlikely the relay failed while you did your repairs.  But for me I have a spare bike so I just swap parts. Try to start it until it floods then disconnect the four pin fuel tank connector and see if you can get it running as the fuel runs out. Sounds odd but try it after exhausting all other options.

+1 I've had to do that on occasion with my K100 when I inadvertently open the throttle while cranking.  When they're cold, they are very easy to flood, and once the plugs get wet they really flood.

[Soggz]

I tAke that back it's unlikely the relay failed while you did your repairs.  But for me I have a spare bike so I just swap parts. Try to start it until it floods then disconnect the four pin fuel tank connector and see if you can get it running as the fuel runs out. Sounds odd but try it after exhausting all other options.

it dosnt crank if I disconnect that 4 pin tank plug...

[Soggz]

Actually think of the tasks you have done since it last ran, the problem is probably in one of those.

maybe... can’t think what, though....

[daveson]

Do u mean it doesn't start?

It should still crank.

[Soggz]

Do u mean it doesn't start?

It should still crank.

yes.disconnect the 4 pin plug at the back of the tank and it dosnt crank until plugged in again.

[Soggz]

Maybe you have given the starter a hard time. I run it for six seconds maximum and then give it a twenty second rest.

starter seems ok, it’s never not worked.

[daveson]

Houston we have a problem.

If you disconnect power to the fuel pump the engine should still crank.

There is definitely something funny going on there.

[Laitch]

yes.disconnect the 4 pin plug at the back of the tank and it dosnt crank until plugged in again.

Disconnect fuse #6 and move on with the test. You can learn which is the correct 4-pin plug later.

[Soggz]

Houston we have a problem.

If you disconnect power to the fuel pump the engine should still crank.

There is definitely something funny going on there.

Hmmm... ok... I shall have another go if I get time tomorrow.
This is the small 4 pin plug at the back of the tank, yes?
Goes down towards the starter, then disappears...

[Soggz]

Disconnect fuse #6 and move on with the test. You can learn which is the correct 4-pin plug later.

will do. I’ll try again tomorrow. It’s getting perplexing now.

[Soggz]

Oh, and thank you, all, for your time and advice.

[Laitch]

This is the small 4 pin plug at the back of the tank, yes? Goes down towards the starter, then disappears...

The plug under discussion connects wiring to the fuel level sender beneath the tank which, in turn, powers the fuel pump.  Lift the tank to see where it connects.  For the flooding remedy described by Gryph and Martin, it's simpler just to disconnect fuse#6 as Martin indicated.

[Martin]

Don't worry about the TPS mine hasn't been connected for years. I disconnected once I totally sorted out the infamous K75 backfire on overrun. It makes tootling around carparks and tight places a lot smother. Actually you have reminded me to reconnect it and just adjust it only works at full throttle. The only downside is if you don't close the throttle on overrun it can still give a slight backfire. Due to the fragile nature of the OEM 4 pin connector I prefer to leave it alone and remove the fuse.
Regards Martin.

[szabgab]

starter seems ok, it’s never not worked.

+1 on what has been said about flooding the engine.  Try to clean the plugs,  put the battery on tender or hook it up to a car battery via a jump cable and crank it that way.  FI is sensitive to correct voltage and you can easily fry the starter relay if you keep at cranking the engine for prolonged periods. 

When I had trouble starting the engine with a semi depleted battery in -5C I have gotten to the point,  when the engine would have not started even connected to a car battery. Once the plugs were cleaned I could just about start the bike without choke,  and it was smoking like hell for a short while.  After all the residual fuel burned off,  bike run just as fine, as before...

[Soggz]

If the connector doesn't lead to the fuel tank ten it's something else, I see that now that it's pointed out.

this is the plug I have to disconnect,if I want to take the tank off,and put it to one side. When I disconnect it,bike starter won't crank over.

[Soggz]

Good earth to starter?

yes, seems ok. Starter turns with no issues, nice and fast, depending on battery state. It’s a new battery.

[daveson]

Somehow your reply came on my reply#379  (Jan. 27, 6:12am)
Your headlight should go out while your cranking so maybe the load shed relay is bad,  swap it with the horn relay,  then the light should go out while cranking.

[The Mighty Gryphon]

You didn't disconnect the 4 pin tank connector, you unplugged the transmission gear position indicator cable.  Starter won't work if you don't have a neutral signal unless you pull the clutch in.

[daveson]

Thank you Houston it's all demystified now

[Laitch]

i heard its called the 4 pin because it has 4 pins... i found a movie of it... im watching it on the split screen... whack whack whack...

The Pimp and His Four Pins—viewer discretion advised.