is a 102 main jet too small for a Rapido 225?

[gpnick2004]

Just went over my notes and I ran a 105 main but struggled getting the mid range jetting correct.

[Special X]

Gonzo you have PM

[Muttlyoo7]

I tried a 25mm PHBL on my Rapido Classic and it wouldn't run properly. I then tried a 26mm PHBH. initially on a 115 main. Then when run in, had it dynod and the jetting was set to;

Main 100, pilot 55, Atomiser AV266, Slide 40 & needle X7 2 to top groove.

the rest of the set up is;

Remote air filter
PM25 exhaust
PM Tuning X-Tech 58mm Crankshaft
SX200 gearing

This was working well until riding 2 up and slowing down from flat out on the motorway when it nipped up. Luckily I could clean the piston up and had the barrel honed out from 3 thou to 3 1/2. It's running fine now, and did 260+ miles last weekend at 55-65 MPH (GPS) with no problems at all. I've no Idea what caused it to nip up and luckily it's not happened again (yet!)
The dyno graph is here if you're interested, http://scooterotica.org/forum/viewtopic ... 2&start=60

[Special X]

I tried a 25mm PHBL on my Rapido Classic and it wouldn't run properly. I then tried a 26mm PHBH. initially on a 115 main. Then when run in, had it dynod and the jetting was set to;

Main 100, pilot 55, Atomiser AV266, Slide 40 & needle X7 2 to top groove.

the rest of the set up is;

Remote air filter
PM25 exhaust
PM Tuning X-Tech 58mm Crankshaft
SX200 gearing

This was working well until riding 2 up and slowing down from flat out on the motorway when it nipped up. Luckily I could clean the piston up and had the barrel honed out from 3 thou to 3 1/2. It's running fine now, and did 260+ miles last weekend at 55-65 MPH (GPS) with no problems at all. I've no Idea what caused it to nip up and luckily it's not happened again (yet!)
The dyno graph is here if you're interested, http://scooterotica.org/forum/viewtopic ... 2&start=60

Go up one or even 2 sizes on the main as 100 is on the edge in this application. I would have recommended trying a 105 to start with. also try 3rd clip on the needle.

[Muttlyoo7]

Cheers for that! I'll give it a go. :fb: