I know that many others will have done what I hope to do, rebuild a modern vespa engine. However, I haven't done this before and hope to use this thread to document my efforts and of course to mine the knowledge of the rest of the forum.
In June this year I took my 2005 GTS (10000 miles on the clock) to Mantova for Vespa World Days( 2000 mile trip). On the way back the engine stopped and I had the scooter recovered from just outside Calais.
A couple of weeks ago I managed to get the scooter into my local dealership. The scoot was in for a couple of days before they came back to me with the diagnosis. A seized camshaft.
The main bearing surface was seized in the head and the small dowel that is driven by the timing chain was broken off the camshaft. The bearing surface in the head is scored and the dealership have quoted £1400 (parts and labour) to put the fault right. So I have decided to pull the scooter back home and rebuild this myself.
Some of you might think that a camshaft replacement and head replacement does NOT constitute an engine rebuild. However, the technician in the dealership went berserk looking for the problem. Rather than starting at the top he started at the back! The variator is off, the clutch off, the water pump off, and pretty much everything on the RHS of the scooter. Before I knew the extent of the strip down I considered that what I paid out for the diagnosis would be a "head start". I now think of it as a handicap as I have far more to do than I thought.
Last edited by waspman on Tue Aug 05, 2014 7:35 am; edited 1 time in total