KyTronik Advance/retard unit

[foremanbob]

Scooter chucked it on route to filling up with fuel on way to Kelso...

Turned out to be the KyTronik box that's chucked it. Was a complete PITA to have to remove it, reset the stator plate back to 17deg and get it all back together again.

Anyone else had a similar issue? In two minds whether to replace it for £78.76, or whether just to run the standard fixed timing with less risk of things to fail...

Thank the lord it happened at the weekend than at the end of the month on route to Geiselwind.....

Thoughts?

[Wack]

I've got 2 of them and been ok so far. What were the symptoms ?

[Donnie]

have to admit i bought a mtech about 2 years ago but since going to the gt186 away from the mugello 186 ive disconnected it and set the stator at 16 degrees if memory serves and left it there. No problems and one less thing to worry about.

[Paulnobodyimportant]

I've 3 of these units and I really like them. However, on way back from Whitby rally my engine seized on the last 3 miles of a 100 mile journey. Prior to it seizing, we stopped for a 30 min coffee break to say our goodbyes. 3 miles later, at cruising speed the engine seized solid. You could smell and hear the heat crackling away.

I stood at the side of the bypass, a mile from home trying to look cool, as if that's what i did every Saturday afternoon. But as I stood there, just about every non scootering friend passed by, laughing and sounded their horn. As I contempleted my situation, my initial thoughts were an air leak or did the KyTronik unit fail and meant that i was running on 26 degrees static timing, rather than variable. It may well be an air leak, as I will test again before dismantling, but I had done an air leak test 400 miles before I left for Whitby. So far I've dumped the lambretta in my garage and temporarily fallen out with it.

Once I get round to looking at this engine, I will post feedback, but it would be useful to see what symptoms you had to know that the KyTronik unit had failed, because I have one of these units on the one that I'm taking to the Euro, so don't want any mishaps.

PS, filled up with petrol 60 miles away, so it can't be faulty fuel.

[foremanbob]

The symptoms were that the scooter died... almost as if it was running out of fuel (reached for the reserve tap), followed by a few more back fires and then a complete halt. Kicked back into life again... but then did the same thing... then just totally dead ; had to push the scooter home the last two miles...

Prior to that I'd felt a few stutters with the scooter, almost as if you were on the verge of reserve, but cleared up again.

Interestingly after I took out the KyTronik the exhaust note sounded an awful lot more "crisp", before it sounded more "dull".

[peter357bikes]

I've run 3 of these with no problems. But I thought if they fail the scoot died ...but you could set it to '0' and run carefully at whatever your timing setting...But I must admit a total failure of the unit is more than possible leaving an oblivious rider. Is it the light in the fridge syndrome..panel off every time to see its working or not?

[foremanbob]

I've run 3 of these with no problems. But I thought if they fail the scoot died ...but you could set it to '0' and run carefully at whatever your timing setting...But I must admit a total failure of the unit is more than possible leaving an oblivious rider. Is it the light in the fridge syndrome..panel off every time to see its working or not?

Being of an electronic engineering background, it could be possible that they fail in a running position...

[hullygully]

I changed my rear wheel the other day & the KY-Tronik failed on me taking out the CDi!!!!!!!!!!! lucky I was in the garage...........