[yetibone]

Idle jets should be .55 to .60mm. Main jets should be 1.50 to 1.55
or more depending on your cam, and air correction jets should be 1.80mm.

I agree your jetting is too lean, and would cause one or more cylinders to be "dead" at idle.

I've honestly rarely messed with Weber IDF's, as I like Dellortos, but I feel sure your 2 litre would need more fuel than the current jetting can provide.

On my last Sand Rail, I had a 2180 Type I with a pair of Dellorto DRLA 40's. The jetting on those were .60 idle, 1.50 mains, 1.80 air correctors. Use that info as a rough basis for yours. My Type I's bore was 2mm smaller, and it's stroke was 11mm longer compared to your TIV.

Good Luck.


Yetibone