my 4FL...

[vinny]

Iv a 4dp
I 'll take a picture in the morning .

[vinny]

2 whites
1 red
1 black

[41juergen]

Perfect, thank's a lot!

[41juergen]

Update: have fitted a YZ125 rotor with a TZ stator. Settings in the Zeel have not changed..

[Andy Bush]

That looks really neat
And I think the rev response should be much improved

Which model TZ did the rotor come from, and do you still have power for lighting now ?

[41juergen]

Had a ride on Saturday. Bike feels more or less the same, no significant improvement in reving (as I didn't expected). The main reason for me is to help the crank bearing a bit reducing the mass of the rotor. The negative aspect of that mod is probably a bit less willingness for overrev (the dyno will tell...).
The rotor is from a Yamaha crosser YZ125, model year 2005. The stator is from a TZ250 model year 1989, the current setup creates only approx 10,5 Volt at 9000 rpm, so a bit less. The stator will get a different winding during wintertime to get close to 12,5 Volt.

[loor]

That is one tiny rotor 10.5Volts with load or at idle? Maybe go for a Led rear light to safe some Watt as well...?

What monitoring setup (afr/egt) are you using? And why is the egt probe so far away from the piston or does it just look like it was more than 150mm?

Best regards!

[casal-fan]

Juergen

Could you pls. check what the code is on the rotor?

The rotor on my 4JT had a little crack.
I "borrowed" one for as long as I want, but would like to check if the YZ rotor can be used.

For the TZs they only sell as kit, rotor/stator/CDI, at looney price.

[vinny]

Second that 
Iv know for ages a yz flywheel will fit on  a  tz but had no  idea what years yz  to look for .

[SeaR1ck]

Juergen

Could you pls. check what the code is on the rotor?

The rotor on my 4JT had a little crack.
I "borrowed" one for as long as I want, but would like to check if the YZ rotor can be used.

For the TZs they only sell as kit, rotor/stator/CDI, at looney price.

I tried to find some pictures of the yz125 flywheel he used. The 05+ i don't recall any markings on the inside of the one off my 06 yz125. The pics i could find looked like the only marks i could find where on the outside.

[41juergen]

@ Lorenz: the 10.5 Volt is with all lights switched on, all are changed to LED incl. the head light (what is not allowed in Germany  ).
The egt is 200 mm far away from the piston, the Lambda sensor 20 mm more. The reason was that I had that also on my 3XV as well my RZ. Futher more when I took out the bleeds from the exhaust pipe, I opend the pipe at the welding from the header to the cones. When looking into the header there was a light grey trace to be seen, potentially from fresh gas during the scavaging. I made some tests with a Lambda sensor at the 220mm and a second sensor at the silencer entance. For any reason there was no difference. May be the fresh gas trace runs only on the top of the exhaust duct...
@ Rui: the bike is together at the moment, I will take it apart during christmas time, so will do a pic then, ok? I think the important parameter (beside the geometric data) is the position of the leading edge of the lobe in relation to T.D.C. As this was the same on my setup, the static angle for the Zeel kept the same.

[41juergen]

So here is a short update: I went onto the dyno to compare the power of the engine with the large (stock) TZR flywheel and the small TZ / YZ flywheel. There is no 1/10 of a HP more, but the overerv kept approx. the same. But the crank bearings will like the lower mass...
The bike also got her "orignial" bodywork painted back... Next is to put all the TZ stuff into the motor.

[no smoke no poke]

nice looking bike that u have there