The phone just rang... (Triumph project)
in [Motorcycles]
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From: The Older Gentleman on 15 Mar 2010 03:15 don (Calgary) <hd.flhr(a)telus.net> wrote: > On Sun, 14 Mar 2010 22:33:38 +0000, totallydeadmailbox(a)yahoo.co.uk > (The Older Gentleman) wrote: > > >Beauregard T. Shagnasty <a.nony.mous(a)example.invalid> wrote: > > > >> A '76 would be an R60/7 - 600cc. > > > >No, it would almost certainly be a 60/6. Drum brake. The /7 had a disc > >and would be a little bit later. Launched in1977, I think. > > > http://www.classicmotorcycles.org.uk/bikemuseum/images/bmw/bmw_1976_r60- 7_600cc.jpg Ah, right, I stand corrected. Other sources list it as a 1977 bike. Just as well I used the "I think" proviso, then. ACtually, Rider magazine's test bike was manufactured in 1976, I now find. Interesting that it remained in production until 1982 - I think that would have been for police orders (popular police bike, the 600) because it had definitely been superceded by the 650 by then. -- BMW K1100LT Ducati 750SS Honda CB400F Triumph Street Triple Suzuki TS250ER GN250 Damn, back to six bikes! Try Googling before asking a damn silly question. chateau dot murray at idnet dot com
From: Sean_Q_ on 15 Mar 2010 06:59 The Older Gentleman wrote: > Way to go! And a Thruxton is the only half-decent modern > Bonnie engine, IMHO. Thanks, TOG, although I wish you'd explain in a bit more detail. The local Triumph shop told me the Bonnie/Scram/Thrux/Amer/Speedm motors are all physically interchangeable even where there are internal differences such as firing order. TIA, SQ
From: TOG on 15 Mar 2010 07:56 On 15 Mar, 10:59, Sean_Q_ <no.s...(a)no.spam> wrote: > The Older Gentleman wrote: > > > Way to go! And a Thruxton is the only half-decent modern > > Bonnie engine, IMHO. > > Thanks, TOG, although I wish you'd explain in a bit more detail. > The local Triumph shop told me the Bonnie/Scram/Thrux/Amer/Speedm > motors are all physically interchangeable even where there are > internal differences such as firing order. > > TIA, SQ The engines are interchangeable, I think, but the states of tune vary tremendously. And, as you say, so does the firing order. The basic Bonnie lump is the 'standard', producing about 66bhp (near as dammit the same as my Duke! but in a rather heavier package). It has a 360 degree crankshaft, like a trad parallel twin. The same engine is used in other Bonneville variants (SE, etc). The Thruxton gets a bit more power and torque (which the Bonnie engine really needs, IMHO). The cruiser versions (America, Speedmaster) have the 270 degree cranks (ostensibly to endow them with a V-twin feel) and much less power - about 60bhp. The Scrambler has the weediest engine of the lot at 58bhp, and also - inexplicably - has the 270 degree crank. It really needs more power, and the 360 degree crank. As it stands... well, you know why I dislike it. Anyway, you've managed to get the best engine of the lot. Well done.
From: Aham Brahmasmi on 15 Mar 2010 08:06 On Mar 15, 4:56 am, "Self-styled Authority on Almost Everything" <totallydeadmail...(a)yahoo.co.uk> theorized: > The cruiser versions (America, Speedmaster) have the 270 degree cranks > (ostensibly to endow them with a V-twin feel) and much less power - > about 60bhp. > > The Scrambler has the weediest engine of the lot at 58bhp, and also - > inexplicably - has the 270 degree crank. It really needs more power, > and the 360 degree crank. As it stands... well, you know why I dislike > it. You make it sound like crankshaft arrangement affects the horsepower output, instead of vibration. I challenge you to defend your thesis, by any means, fair or pikey.
From: Beauregard T. Shagnasty on 15 Mar 2010 08:33
The Older Gentleman wrote: > don (Calgary) <hd.flhr(a)telus.net> wrote: >> (The Older Gentleman) wrote: >>> Beauregard T. Shagnasty <a.nony.mous(a)example.invalid> wrote: >>>> A '76 would be an R60/7 - 600cc. >>> >>> No, it would almost certainly be a 60/6. Drum brake. The /7 had a >>> disc and would be a little bit later. Launched in1977, I think. >> > <http://www.classicmotorcycles.org.uk/bikemuseum/images/bmw/bmw_1976_r60-7_600cc.jpg> > > Ah, right, I stand corrected. Other sources list it as a 1977 bike. > Just as well I used the "I think" proviso, then. ACtually, Rider > magazine's test bike was manufactured in 1976, I now find. It gets sticky from time to time. I purchased one of the first 300 U.S. K75Ss, in late August 1986 [1], though the paperwork called it a 1987. > Interesting that it remained in production until 1982 - I think that > would have been for police orders (popular police bike, the 600) > because it had definitely been superceded by the 650 by then. My recollection is that the (at least in the U.S.) 'original' 600 (/7) ended production with 1977 model year, and the R65 (smaller frame, wheels, different motor) began with the 1978 model year, late in the year. My wife rode a 1983 R65. Then, the final few R65s (1987?) were that same engine but placed in the same frame as the big boys. The R65 was built so they would have an "entry level" motorcycle... [1] looks up old calendar: Thursday, August 28th, actually -- -bts -Four wheels carry the body; two wheels move the soul |