Pheas' - Ha! Well, I did have 10 liters of fuel, a spare wheel, a bag of tools, and a six pack of beer - just in case...
Jack - the additional ping marks all occurred using an EQ rod - and your basic premise is right - I was compensating for the first 1/3-1/2 throttle. That's why I got some EK rods to experiment with.
For sure I am on new ground here with the Smart Carb. Those guys don't have the depth of experience with Vespa motors that they have with two stroke dirt bikes. In their defense tho - I knew that going in and offered to help provide some feedback and data. Making myself a worlds foremost expert in Smart Carb for Vespa jetting. 🙂.
The steeper taper rods allow me to be richer WOT and leaner small throttle now. I've been mapping the piston top after ea. major ride with new rods. The 60+ mile ride before and after are below. The EK rod appears not to have added any new marks - and let it be said - I was not kind to it when we ran in the hills.
And now you know why I hadn't ported/lifted the BGM...
I think you're changing the plan and going to run the MHR bolt on next. It will be interesting how this compares with the bolt on BGM. But both a bit of a yawn compared to the tuned versions.
Took a bit longer than expected to get the 57mm MHR kit.
Think it's better this way for a number of reasons.
- Out of the box comparison.
- Longer time on the BGM to get a better sense of it
- No rush on the work - I can be riding the Malossi while I tune the BGM
Question - can I polish out the marks on the piston top so it start's fresh as I tune? Worth it?
July 11th - had not received the EK's yet - had leaner tipped EQ rod. in than I am running now in an EK.
July 22 - EK rod allowing leaner bottom and richer WOT. Shot after the SoCal/MJ ride. No new ping marks - tho it was run hard and long.