> > From: Mark Roberts <[EMAIL PROTECTED]> > Date: 2005/06/09 Thu PM 01:06:42 GMT > To: [email protected] > Subject: Re: PESO: This morning's shoot > > Tom Reese <[EMAIL PROTECTED]> wrote: > > >Mark Roberts wrote: > > >> BMW and Motto Guzzi bikes are the same way. Still, bikes that use common > >> oil supplies for engine and transmission are in the majority > >> numerically. > > > >I hadn't realized that and I'm a little mystified by it. I don't > >understand the rationale behind a design that allows potential chewed up > >gear shards to reach engine bearings. It makes sense for race bike > >applications but it seems inadvisable for street machines. > > > >The marketplace has deemed it to be a valid concept so I guess it is. > > Lower manufacturing cost and reduction in engine size/weight. And the > fact that "chewed up gear shards" are almost in the realm of science > fiction given the reliability of today's bikes. My FZR redlined at > 14,000 rpm and the recommended valve clearance adjustment interval was > once every 26,000 miles. Since I raced mine I adjusted the valves once a > year and usually found only two or three that were out of spec. > > A typical bike these days will go 100,000 miles with only routine > maintenance. This even applies to cutting-edge sport bikes if they > aren't owned by testosterone-addled twits who end up crashing them to > bits! (And surprisingly, many are ridden by older, more sensible > riders.) I have no doubt my old 1986-technology sport bike can reach > 100,000 miles before I ever need have a cylinder head off.
They copuld but I think most are more likely to end up with about 1/5th of that. 2-3,000 miles a year seems to be the norm abround here. One local changes his bike religiously every year for the same model. The record was just under 600 miles. MMTS. > -- > Mark Roberts > Photography and writing > www.robertstech.com > > ----------------------------------------- Email provided by http://www.ntlhome.com/
