Ignition timing advancing with revs?

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Jackomad5
registered user
Posts: 12
Joined: Tue Jan 23, 2018 10:11 pm
Main scooter: LML kitted
Location: Stoke on Trent
Contact:

Sun Feb 17, 2019 12:09 pm

Hi, please help!

Currently trying to get my timing sorted on my LML malossi 166, ignition system is LML (separate coil and CDI) (fixed timing)

Timing is strobed at the 3000 ish rpm at 17/18

Thing is when I rev it high and the pipe kicks in the timing waaaay advances to well above 20. Is this normal? Surely this can’t be going on inside the engine.

I will add that I have melted a piston on this previously, however at the time I put that down to the timing simply being set to high to begin with, of course I’m now starting to question if this was the issue.

Appreciate any response! Cheers

eibargum
registered user
Posts: 378
Joined: Wed Jan 07, 2009 6:38 pm
Main scooter: Vespa PX210 Polini
Contact:

Sun Feb 17, 2019 12:59 pm

Iam relatively new to Vespas Jack so take all I say with a pinch of salt, I recently fitted a Polini 210 top end on my "apart from SIP road 2" standard PX, I strobed it to 19 degrees and noticed mine advances when revving it.

Jackomad5
registered user
Posts: 12
Joined: Tue Jan 23, 2018 10:11 pm
Main scooter: LML kitted
Location: Stoke on Trent
Contact:

Sun Feb 17, 2019 9:06 pm

Well atleast I’m not the only one eibar! :lol: I’ve known them to advance slightly when stobed but never to this degree

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