Splutter on Higher Revs

[Dazza]

What's your fuel flow rate like?

[Starwave]

Fast flow tap that has given decent flow when I've looked at it in the past.....but, yeah, haven't checked it recently. Gotta be worth a look tomorrow. Cheers.

[adriang]

I'm running a Rapido 225 open mouth, under panels, with a 118 main jet, and I think it's a touch rich. Might be over jetted?

[J1MS]

The pickup that I had that would only rev to 6k rpm on the stand tested fine with a multimeter! it revved fine all the way up to 6k rpm then just wouldn't rev any higher, changed pickup and engine revved to over 9k rpm on the stand.

I had the same with a replacement NEW pickup, scoot fired up but failed to rev past 5500rpm.

[Starwave]

Ai, think a dodgy pickup is favourite going by what a couple of you have said. Shame I couldn't try one I know that works for defo, best I can do is fit the new stator when it gets here and hope it's okay.
Jetting probably isn't great as I've no experience of reed valves but don't think it's a million miles out. Will be getting it dynoed when I get a chance. If you heard the scooot when it's being revved hard on the stand I reckon most would agree it sounds llike an ignition problem.

[adriang]

Do keep us informed! I've got one of those kits, just not fitted it yet!

[Starwave]

Fitted the new stator last night and rode t scoot t work today. It now revs out well clean, no splutter all the way to full bore on t stand, well pleased. Sorted.......... probably was the pick-up breaking down, spot on, cheers for the advice.
But it still coughs and hisses when cruising and over around 50mph. Must be unrelated. Will be doing a good few hundred miles on it next weekend so that'll be t true test. Will let you know what happens......

[arthur]

on my LTH reed valve my main jet is a 144 as Ben from rayspeed recommended also on a rapido 225 cheers art