Print Page - timing setting for 74.5 400 mx

Title: timing setting for 74.5 400 mx
Post by: Adrian Crawford on June 03, 2013, 04:08:29 PM

Would you be able to advise the correct timing for my 400 mx 74.5? I have a mikuni on it but although can kick her over reasonably its still a devil to start and read somewhere that timing is critical.
Thank you:)

Title: timing setting for 74.5 400 mx
Post by: rob w on June 03, 2013, 08:43:33 PM

Hi Adrian,

I have always used 2.4 mm BTDC with a Motoplat ignition. That is also what is usually recommended in the manuals.

Title: timing setting for 74.5 400 mx
Post by: Jerry Birky on June 04, 2013, 01:09:09 PM

Hello Adrian, If you retard the timing to 1.8 mm BTDC will help your engine start easier, but the trade off is loosing a bit of peak performance.

Title: timing setting for 74.5 400 mx
Post by: Adrian Crawford on June 04, 2013, 04:40:56 PM

Just what i need. Thanks guys> I think i could live with less top end the thing is like a bullit once going. My arms are getting longer ffrom the acceleration whilst my left leg is like popeye from kicking her over. Not pretty.Thks.

Penton Owners Group

General Discussion => Penton Talk => Topic started by: Adrian Crawford on June 03, 2013, 04:08:29 PM