Yes, me again with a soliloquy about my troublesome 175 Turismo's thirst for oil. Following tobydmv's advice I've stripped down the upper engine
and discovered a surprising amount of wear in the cylinder bore - a very pronounced ridge is visible mostly on the rear of the bore which, I imagine, causes the piston
to rock back and forward during its travel on the upwards stroke. Since the piston is marked 60.6 on its crown I guess I'm close to maximum oversize so
I was considering a resleeve job on the barrel. Before deciding on this, someone kindly offered me another barrel & piston which seem unworn. Only problem
is that my 4 head retaining bolts are a very loose fit in the 'new' cylinder's threaded holes - my bolts seem about 1mm too small in diameter. So I cannot use them as is ;fit rethread inserts into the cylinder holes to bring them down to the size of my bolts perhaps is the way to go ? Can anyone on this forum confirm this difference in dimensions and are there likely to be other different dimensions that I should be aware of encountering if I swap parts ? The parts I have been offered are reputedly from a 175 Turismo, like mine.
Happy Xmas to all my readers !
175 Turismo head bolts size
Re: 175 Turismo head bolts size
Jonjim
The King of Pistons in Italy should be able to supply you with a 62MM oversize piston.
http://www.thekingofpiston.com/
Your problem with the retaining bolts seems strange to me, they should be identical for all Turismo's.
Good luck
Thomas
The King of Pistons in Italy should be able to supply you with a 62MM oversize piston.
http://www.thekingofpiston.com/
Your problem with the retaining bolts seems strange to me, they should be identical for all Turismo's.
Good luck
Thomas
Re: 175 Turismo head bolts size
Could it be a modified GT barrel? Or perhaps a Turismo barrel modified to fit GT (or later) cases.
The turism crankcase spigot is smaller, but otherwise they're fairly similar.
My Settebello racer had been taken out to 200cc with a Triumph Tiger Cub piston. I'll be rebuilding it with a Honda CB350 twin piston.
The turism crankcase spigot is smaller, but otherwise they're fairly similar.
My Settebello racer had been taken out to 200cc with a Triumph Tiger Cub piston. I'll be rebuilding it with a Honda CB350 twin piston.
Paul Compton
http://www.morini-mania.co.uk
http://www.youtube.com/user/EVguru
http://www.morini-mania.co.uk
http://www.youtube.com/user/EVguru