Malossi 210 pinging in mid range

[bogs]

Set up is malossi ported barrel and matched case transfers , 16' ignition , 1.25 mm squish, jl pipe and standard carb.
It pings its head off at about 6000 rpm, so mid throttle in 4 th.
I've tried with 140 air corrector and be4 in carb as been advised but tbh the 140 makes it 4 stroke.
Any ideas of how to stop pinging would be appreciated

[rapido230]

What head is it? Is it one that's been machined or bought? Because of compression ratio, also see you using leaded or super

[drunkmunkey6969]

What's the full spec of your jetting?

Pilot, main, atomiser, air corrector etc?

[bogs]

The malossi kit is purchased from sip its the sesc tuned black coated barrel that comes with the mmw head that they claim reduces pinging !
The jetting for the 24 mm standard carb is pj 45/120 (2.66) mix screw 3 out, emulsion tube is be4,air corrector 160( tried 140 but 4 stroked) mj 132, slide is standard.

I use 95 octane unleaded.

Any suggestions?

[rapido230]

That kit is for a long stroke crank, I gather you have a 60mm crank? And I wouldn't run on 95 unleaded, I been using super on mine for yrs , on way cleethorpes I had to put in normal unleaded and it pinged and blew my piston

[drunkmunkey6969]

Try this: 50/100 132m/BE3/140ac screw 2.5 turns out.

[bogs]

Thanks for the advice, I will try this set up. Yes it has a 60 mm crank.
If your set up was pinging on super rapido 230 wouldn't mean you have a similar problem. If so what was similar to my set that may identify the issue.
Drunk monkey have you experienced this issue and if so was it resolved by using a lower octane fuel ?

[rapido230]

Meant mine was pinging on normal 95 unleaded, I ALWAYS use super but as no stations had super I was fooked lol, therefore an expensive repair

[bogs]

Meant mine was pinging on normal 95 unleaded, I ALWAYS use super but as no stations had super I was fooked lol, therefore an expensive repair

Sorry I got wrong end of the stick.
However I was under the impression from reading comments from well known tuners that the 98 Ron fuel contained additives for cars that increased detonation likelyhood in 2 strokes ?

[Norrie Bodge]

Set up is malossi ported barrel and matched case transfers , 16' ignition , 1.25 mm squish, jl pipe and standard carb.
It pings its head off at about 6000 rpm, so mid throttle in 4 th.
I've tried with 140 air corrector and be4 in carb as been advised but tbh the 140 makes it 4 stroke.
Any ideas of how to stop pinging would be appreciated

read here may help -> http://scooterotica.org/forum/viewtopic ... 40#p199440

& listen to the video in post #1 helps you understand how the emulsifier/atomiser works