Super Dio ZX AF28 and other Dio scooters

[sanjuro]

Yes, it's quite a bit smaller than the PG Typhoon. It's only 22mm wide at the exhaust flange opening. So both slow and main jet need to go down?

[sanjuro]

Good gawd!!! I just test road the bike with the pipe, and it hit 50 mph at 1/8 mile, and that was running the carb super rich. Temps were in the 520-540F range.

Anybody want a PG Typhoon super cheap? It's got a hole drilled on the head for the EGT sensor.

I'm telling you guys, if you can spring for a Burial pipe, get it pronto.

[losthope]

Nice sounds mean.Though If i were going to throw down big money for pipe id get the jolly moto. supposed to hammer 72cc bikes

[evilone]

I must have missed it but how many $$$s was the burial exhaust and it's pretty hard to source one right?

[sanjuro]

Nice sounds mean.Though If i were going to throw down big money for pipe id get the jolly moto. supposed to hammer 72cc bikes

I thought about the Jolly Moto, but for the price I'd just get the windjammer.

[sanjuro]

I must have missed it but how many $$$s was the burial exhaust and it's pretty hard to source one right?

They're $450 brand new plus shipping from Japan.

I got mine barely used from Yahoo Auctions Japan.

[sanjuro]

http://www.youtube.com/watch?v=88yrbnnvlbQ

[bakaracer]

Sounds good! looks good! but does it feel good? jetting sounds a little fat.

[sanjuro]

Sounds good! looks good! but does it feel good? jetting sounds a little fat.

It's way too fat. I went down this afternoon from a 37.5 slow and 180 main jet to a 35 slow and 170 main. It ran really well, but this evening it wasn't idling smoothly and dying unless I opened the throttle to allow more air in. The EGT is reading really low temps too (500-600F range).

The game plan for tomorrow is to go to a 32.5 slow and 165 main. Hopefully, reducing the jet sizes will help improve the fuel 'economy'.

Even not perfectly tuned this pipe's mid range is huge, just like you speculated regarding the pipe's shape/form characteristics. I can easily peg 55 mph whereas before I had to have a slight downhill to reach it while tucking. The acceleration is vastly improved too, and I have to use the brakes much harder to slow down.

[bakaracer]

set the pilot so that when it idles and you grab a quick hand of throttle,it doesn't bogg.if you change both the pilot and main,thats a big change.remember the pilot overlaps into the main jet but you don't want to go to small and make your 0to1/4 throttle lean.

[bakaracer]

You should try that pipe on your mhr kit.

[sanjuro]

...remember the pilot overlaps into the main jet but you don't want to go to small and make your 0to1/4 throttle lean.

I'll be careful to check the plug and monitor the temps.

[sanjuro]

Put in the 32.5 slow and 165 main jets today, and the bike seemed a lot crisper at the bottom end. I still can't get the temps to break 619F even at WOT. After going WOT and doing a little medium speed riding the idle at the stop lights read 400-420F.

The previous jet setting yielded a 55.5mph topspeed, and today's jets allowed me to do 57mph. I have to say the brakes are really working overtime to slow the bike down since it accelerates to stop signs/signals so quickly compared to when I had the PG.

[elite_dub]

I have to say the brakes are really working overtime to slow the bike down since it accelerates to stop signs/signals so quickly compared to when I had the PG.

Time for big brakes 220mm rotor and dual piston caliper

[Wheelman-111]

Greetings:

Fearing that too-small pilot effect of off-throttle heat spikes, I too had a 35, 32.5 etc. Pilots installed in F3 but couldn't get it to run right in the low end. Swapped in stages all the way down to current 22.5, and just barely lean enough to carburet clean on take-off. Heat rises only to 375 CHT on coast-down, which the Nikasil handles well. Maybe this illustrates the effect of different reeds and port timing? One reason not to rely too much on someone else's results with jetting. However we do agree on the 165 Main.