Super Dio ZX AF28 and other Dio scooters

[sanjuro]

I rode 40 miles in the very early morning, bringing the total to 218 miles on the bore. The bike seems to be running a lot smoother now. The front end actually lifted up on me when I throttled it quickly at a stoplight, and I could feel the rear end kick out a bit on a hard transition out of a banked curve.

Here's the topspeed for the latest ride running 9.71:1 gears:

[veedubh20]

golden cocoa color should be fine on spark plug burning.

[bakaracer]

I rode 40 miles in the very early morning, bringing the total to 218 miles on the bore. The bike seems to be running a lot smoother now. The front end actually lifted up on me when I throttled it quickly at a stoplight, and I could feel the rear end kick out a bit on a hard transition out of a banked curve.

Here's the topspeed for the latest ride running 9.71:1 gears:

not bad at all!just keep fine tuning that thing.

[evilone]

The front end actually lifted up on me when I throttled it quickly at a stoplight, and I could feel the rear end kick out a bit on a hard transition out of a banked curve.

Nice, a kinda want some 9:1 gears myself.

[sanjuro]

The front end actually lifted up on me when I throttled it quickly at a stoplight, and I could feel the rear end kick out a bit on a hard transition out of a banked curve.

Nice, a kinda want some 9:1 gears myself.

Oh, this was done with 9.71 gears, which of course are a little shorter.

I've got a 9:1 secondary gear set for sale with the gear already pressed on if you're interested.

[sanjuro]

I just swapped out my jets again from a 40 pilot and 180 main to a 37.5 pilot and 175 main jet. I've got the EGT installed, now I just have to wait for it to stop raining to test out the temps/jetting.

[sanjuro]

I'm currently using the kickstart only to start the scoot. If I installed the starter motor and bendex gear, would I be able to use the push button start? Just curious since I've heard that the motor once upgraded has too much compression for the starter motor to spin the crank.

[Wheelman-111]

Greetings:

Flash 4.0 at 150 PSI and even Flash II at 170+ cranked over just fine with E-start. Sometimes it struggled a bit. At 120 or less the starter on F3 works just like stock.

The ZX trans needs a 2mm thick dowel in the socket or a shim washer behind the Bendix

[sanjuro]

The ZX trans needs a 2mm thick dowel in the socket or a shim washer behind the Bendix

That's good to know, and I see that shim in my parts catalog. Somehow though, I don't have it in my inventory despite having a SK50 ZX motor.

[Wheelman-111]

Greetings:

Oops! Forgot yours is san 18. Different Bendix or case/cover dimensions? May not need spacer compensation.

[sanjuro]

The Bendix for my bike has the part number 31209-GR1-750 (14T/63T), which is similar to the SA50 motor 31209-GR1-014 (14T/63T).

What is the entire length of the SA50 Bendix?

[sanjuro]

Well, I had two bendix assemblies. The first one had a thicker base cog, and the second one consisted of two identical base cogs, but the overall depth of the second one was less than the first. So it would seem obvious the second one needed a shim, but it didn't. I tried the first cog as-is, and it was a no go. I couldn't get the crank to spin. The second bendix installed as-is (no shim) worked like a charm. It started right up, and had this really cool 'kling' sound when it made contact with the outer drive face.

I didn't get a chance to ride the bike today, but did finish the install of the starter, and the EGT wires were routed and setup.

[bakaracer]

Nice! so the fine tuning begins.

[evilone]

It started right up, and had this really cool 'kling' sound when it made contact with the outer drive face.

My wifes does the same "kling" everytime she starts it.

[sanjuro]

Well, the 37.5 pilot and 175 main jet appears to be too small. At idle the temp was in the 420F range and at 35 mph it was 600F.

I'll go back up to the 40 pilot and 180 main, or even bigger. *, I think I'm going to bump up the slow jet to a 45 and go to a 190 main.