Main Motorcycle: '08 Moto Guzzi 1200 Sport
Join Date: May 2005
Location: Hudson, Ohio - USA
Other Motorcycle: 2012 Griso - SOLD
Extra Motorcycle: 1991 BMW R100GS
Not a throwaway bike
A Bonnie will run as long as you're interested in keeping her running. Like anything mechanical, 'stuff' will eventually start showing wear, and will need replaced. From my experience to date, you have little to worry about. Almost 40,000 miles on my 2003 790cc, and no major issues, just replacement of wear items (brake pads, chain, sprockets).
My much older Beemer (1991 GS) recently turned 118,000 miles. She's required a bit more maintenance as she's gotten older, starting from most recent:
- steering head bearings - this year
- cam chain/tensioner. Carb rebuild - last year
- alternator rotor at 94000 miles. Replaced with aftermarket unit.
- replaced starter motor with good used one - 3-4 years ago
- pulled tranny at 65000 & 104000 miles to replace output shaft bearing (known design problem)
- Clutch and rear main seal at 65000 miles.
- Monoshock replaced at 50000.
The airheads typically have head work done at 80-100k miles (valves, guides, and as long as the heads are off, probably the pistons and rings, too). A warm compression test showed this old air cooled engine to be holding approx 140psi both cylinders. Not bad! So, the top end work will be on hold until 2010 or 2011.
Nice thing about bikes like the Bonnie and older airhead Beemers ...... many of the mechanical and cosmetic pieces and parts are the same year after year, and are interchangeable across various models. Makes it much easier to keep 'em runnin'!
GBNF: 03 T100 Luc Org and Silv: 122/42 jets, TORs, 18T, UNI filter, no AI, Polaris bellmouth, Metz 880 tires, Prog. 440 shocks (105/150 springs), 11-1124 frk springs, Thrux frk caps, gaiters, MotoTwin bars, 6024 lamp, htd grips, 12v outlet.
Last edited by ohiorider; 08-18-2009 at 03:56 PM.