MBK Magnum Racing XR AV10 Engine Timing

user name /
this_username_has_already_been_taken
May 13, 2022 05:59AM

So, I upgraded a Motobecane 50v with a MBK Magnum Racing XR engine and it's slightly slower now and smokes more at idle. Power is decent. I have narrowed the issue down to either the timing or rings(compression seems okay though). I have never timed a CDI before, but think I could do it, just need to find the correct timing measurement.

It appears to be difficult to find timing information for the MBK Magnum Racing XR. I think 1.7mm before top dead center might be a decent guess and is what I think I will try if I can't find any info.

Suggestions appreciated.

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Re: MBK Magnum Racing XR AV10 Engine Timing

Born to be WillD /
willd
May 13, 2022 11:47AM

I time off degrees usually, since mm to degrees varies w stroke but 1.7-2mm is generally good, I time 15-20deg BTDC but depends a lil on bike and peak RPM etc. still 17's a great general starting point.

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