V7 Engine Swap

[Parashootist]

Currently considering options for replacing the engine on my 2015 V7i. Has anyone swapped in an earlier or later engine? I understand the V7ii, V7iii, and later are mounted at a different angle. Would swapping the corresponding cradle be the only modification necessary besides the exhaust?

[faffi]

Speaking without knowledge, I would still believe the angle is down to the frame and not engine castings - the former is cheap, the latter costly. But my guess is not enough to buy and engine, you want confirmation. Someone will give it to you.

[Dirk_S]

The clutch bell housing on the V7 II is different—whether that means mounting holes are different, affecting the potential for mating a 5-speed pre-V7 II gearbox to a V7 II or III…not sure.

The lower rear mounting tab on the FRAME that connects to the TOP of the gearbox was dropped down beginning with the V7 II.

I’m still mildly gobsmacked that the gentleman on ADVRider was able to bolt up the V85 motor without much issue.

[Kev m]

I’m still mildly gobsmacked that the gentleman on ADVRider was able to bolt up the V85 motor without much issue.

Though full disclosure, that was months ago and at last update I believe it's still not running.

[Dirk_S]

Though full disclosure, that was months ago and at last update I believe it's still not running.

For sure, but that’s on him for choosing to skip out on a specific ECU and..and…? Aside from an ECU, if the motor bolts up, I can think of a too much else significantly holding one back. A lot of the other stuff would be universal or homebuilt, ya?

[Kev m]

For sure, but that’s on him for choosing to skip out on a specific ECU and..and…? Aside from an ECU, if the motor bolts up, I can think of a too much else significantly holding one back. A lot of the other stuff would be universal or homebuilt, ya?

I don't know how much of the fuel system he got from the donor bike. But that's part of the potential problem in general for that swap. Even IF physically mounting it isn't too big a deal.

I do remember when the V85 first came out the demo truck guy or maybe it was Jim Hamlin who pointed out some of the smallblock mounting points that were there because it was the same block casting but weren't used by the V85 frame.

[Parashootist]

The clutch bell housing on the V7 II is different—whether that means mounting holes are different, affecting the potential for mating a 5-speed pre-V7 II gearbox to a V7 II or III…not sure.

The lower rear mounting tab on the FRAME that connects to the TOP of the gearbox was dropped down beginning with the V7 II.

I’m still mildly gobsmacked that the gentleman on ADVRider was able to bolt up the V85 motor without much issue.

There is a 2021-2023 engine on ebay with the gearbox.

https://www.ebay.com/itm/176489694151?fits=Model%3AV7%7CMake%3AMoto+Guzzi&_skw=moto+guzzi+v7+engine&itmmeta=01JWRXQD7GJD7TEB5SJ2Y8MGP3&hash=item29179b03c7:g:b24AAOSwu6xmooiE&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1fpH%2FcHPGLH0jMR8nSBkVldKtYgjnKeL%2FdSI1gMrUwWP%2BbjA2Plgpp3f%2FvZ237xlYqp6CjkJs84r04TNyQwf0YScodtNdAdBWoujur3UNTugoJIo0YlDktAFdWn8szkuyr3sxSc5bZIXkEmHHpD1NOxNicN8LJNT5OqFbqjhLHaT0NEsPvqlKVwhniKdE8fItzy2%2FwBAge2IIDWCsATif2ABVsbr1vUKTQIeC2FH4zOeese%2FYKUCkECNWW6GdMuTe8WTDvNyPAfwt4ZIktJuKX%2F4CwT%2F4gw%2FKdE7nDOgcldEg%3D%3D%7Ctkp%3ABk9SR4bU3Z3mZQ

[Kev m]

There is a 2021-2023 engine on ebay with the gearbox.

https://www.ebay.com/itm/176489694151?fits=Model%3AV7%7CMake%3AMoto+Guzzi&_skw=moto+guzzi+v7+engine&itmmeta=01JWRXQD7GJD7TEB5SJ2Y8MGP3&hash=item29179b03c7:g:b24AAOSwu6xmooiE&itmprp=enc%3AAQAKAAAA8FkggFvd1GGDu0w3yXCmi1fpH%2FcHPGLH0jMR8nSBkVldKtYgjnKeL%2FdSI1gMrUwWP%2BbjA2Plgpp3f%2FvZ237xlYqp6CjkJs84r04TNyQwf0YScodtNdAdBWoujur3UNTugoJIo0YlDktAFdWn8szkuyr3sxSc5bZIXkEmHHpD1NOxNicN8LJNT5OqFbqjhLHaT0NEsPvqlKVwhniKdE8fItzy2%2FwBAge2IIDWCsATif2ABVsbr1vUKTQIeC2FH4zOeese%2FYKUCkECNWW6GdMuTe8WTDvNyPAfwt4ZIktJuKX%2F4CwT%2F4gw%2FKdE7nDOgcldEg%3D%3D%7Ctkp%3ABk9SR4bU3Z3mZQ

They changed the final drive and transmission between the V7III and the V7850. I don't know if either change means any incompatibility between them and the old final drive but figured I should mention it.

[Dirk_S]

They changed the final drive and transmission between the V7III and the V7850. I don't know if either change means any incompatibility between them and the old final drive but figured I should mention it.

Hmm. Looking at the V7 850 parts fiche, the rear transmission output in the gearbox that the driveshaft connects onto is indeed different from the prior output shafts (V9 used the same output shaft as the pre-2020 V7 models). However, the V7 850 DOES use the same output shaft—2A000998–as the V85TT from 2019-on, and the guy on ADVRider is using the pre-2020 V7 swingarm, thus we can assume the older driveshaft, too—so it seems like maybe the V7 E5 output shaft is the same size and has the same number of splines as the older V7 and V9.

Here’s a link to the part number of that shaft: https://motoguzzi.genuine-parts-catalogue.com/guzzi-laverda-scarabeo/assignment_spare_parts/2A000998

ADDENDUM: 2A000203 is the driveshaft for the V7 II, V7 III, and pre-E5 V9. Although pre-2015 V7 models don’t appear to share this output shaft, the same driveshaft has been used since 1982 up to the V7 III. I suppose we can then assume the old-style drive shaft should connect to the V7 E5 models.