low to mid range flat spot

[barney 66]

It has VHBZ carbs and has new rubber manifolds that I have fitted but not sure where the balance pipe would go, this would help me greatly if it had that, yes it does have a tail piece
Thanks barney

[MickeyMoto]

Hi Barney,

Please see photo, the tube running up under the tank connects with the other carb. This is the balance port. If you look at the inlet rubber there is a boss where a hole was drilled on earlier bikes to put a takeoff for balancing. There was a mushroom shaped piece of metal that filled the hole when not in use.

[Steve Brown]

The balance ports Mickey refers to are on the carbs, not the rubber inlet mounts. There is usually a rubber pipe connecting one cylinder to the other, but they may be blanked off by a previous owner.

[barney 66]

Thanks for the picture, these don’t appear to be on mine

[MickeyMoto]

Blooming 'eck! Italian manufacturing!

Try doing something on the intake rubbers. I've seen a take off fitted from the inside glued in with a screw on cap. I think it is essential on a Morini.

[barney 66]

I’m working on the carbs at present, they will have vac ports by the end of Today, Thanks for the pics

[barney 66]

IMG_1381.jpeg (111.41 KiB) Viewed 35 times

Ok upadate, vac ports added to carbs, ultrasonic cleaned, balanced at tickover and 2000 rpm, nice crisp pick up off idle, then took it for 20 mile thrashing, revs up to red line, rides fine if you thrash it all the time but if the rpm is between 3-5000 and gently roll on the throttle it still has the flat spot, not as bad, new 112 main jets and 42 idle jets balanced and checked again when I got back timing spot on plugs now a dark brown no soot.

Any other ideas to make this slightly better or do I have to put up with it, it is more rideable but hard work when 2 of us go out

Thanks barney

[70sbikes]

Mikuni's!

[barney 66]

Didn’t really want to go to the expense of that really, I guess it’s new cables as well ?

[MickeyMoto]

It is how the Sport is. Use the gearbox. Back in the day it was reckoned to being akin to a two smoke. As I have aged (not matured) I prefer the gentler Strada.

[barney 66]

It is how the Sport is. Use the gearbox. Back in the day it was reckoned to being akin to a two smoke. As I have aged (not matured) I prefer the gentler Strada.

Hmm, I thought that might be the case, and your right my 76 Strada is a nicer ride, I bought this as at the minute I’m struggling to start it due to a hernia

[MickeyMoto]

Transplant the flywheel and casing to the Strada!

[barney 66]

Now that might be a plan, little winter job maybe as it will involve some wiring as and handlebar controls as well I guess, I will look into this now, Thanks for planting the thought