Difference between an R100T and an R100RT?

[AnnapolisAirhead]

Not correct--all USA 1000 models had the same engine in the same year beginning in 1979.

Here's the R100RT specs: http://www.bmbikes.co.uk/specpages/R100RT.htm which claims:
R100RT
Displacement 980 cc
Max Power 70 hp (51 KW) at 7,250 rpm
Max Torque 77 Nm / 56 ft lb at 5,500 rpm
Compression Ratio 9.5 : 1
Rear Wheel Ratio 1 : 3.0 or 1 : 2.91
Bevel/Crownwheel 11 / 33 teeth or 11 / 32 teeth
Top Speed 190 Kph / 118 mph
Acceleration 0 - 100 Kph / 62 mph 5.0 seconds

Here's my bike specs: http://www.bmbikes.co.uk/specpages/R100.htm which claims:
R100
Displacement 980 cc
Max Power 67 hp (49 KW) at 7,000 rpm
Max Torque 72 Nm / 53.09 ft lb at 5,500 rpm
Compression Ratio 8.2 : 1
Rear Wheel Ratio 1 : 3.00
Bevel/Crownwheel 11 / 33 teeth / US 11/32 as R100/T
Top Speed 195 Kph / 121 mph
Acceleration 0 - 100 Kph / 62 mph 4.6 seconds

Not sure if the specs are for US or non-US models as they don't specify on the HP specs, except on the Bevel/Crownwheel. Could be that it was just easier to level the playing field, make them all the same for the bikes destined for the US market and that these numbers are for the euro and other non-US markets but that seems like a weird mod to manufacturing. Then again, these specs could be bullbutter too. I dunno.

Anyway, that where I read about the HP delta. Its more of an idle curiosity than anything else--the number differences are marginal in my opinion.

 

[dduelin]

Here's the R100RT specs: http://www.bmbikes.co.uk/specpages/R100RT.htm which claims:
R100RT
Displacement 980 cc
Max Power 70 hp (51 KW) at 7,250 rpm
Max Torque 77 Nm / 56 ft lb at 5,500 rpm
Compression Ratio 9.5 : 1
Rear Wheel Ratio 1 : 3.0 or 1 : 2.91
Bevel/Crownwheel 11 / 33 teeth or 11 / 32 teeth
Top Speed 190 Kph / 118 mph
Acceleration 0 - 100 Kph / 62 mph 5.0 seconds

Here's my bike specs: http://www.bmbikes.co.uk/specpages/R100.htm which claims:
R100
Displacement 980 cc
Max Power 67 hp (49 KW) at 7,000 rpm
Max Torque 72 Nm / 53.09 ft lb at 5,500 rpm
Compression Ratio 8.2 : 1
Rear Wheel Ratio 1 : 3.00
Bevel/Crownwheel 11 / 33 teeth / US 11/32 as R100/T
Top Speed 195 Kph / 121 mph
Acceleration 0 - 100 Kph / 62 mph 4.6 seconds

Not sure if the specs are for US or non-US models as they don't specify on the HP specs, except on the Bevel/Crownwheel. Could be that it was just easier to level the playing field, make them all the same for the bikes destined for the US market and that these numbers are for the euro and other non-US markets but that seems like a weird mod to manufacturing. Then again, these specs could be bullbutter too. I dunno.

Anyway, that where I read about the HP delta. Its more of an idle curiosity than anything else--the number differences are marginal in my opinion.

If you still have the original owners manual it says the R100 (what you call the 100T) had the same 11/32 final drive as same year RT and RS bikes. After 1980 all US 1000cc bikes had 8.2:1 compression ratio. Plug your VIN in the chart on the bmbikes.co.uk site and see what month/year it was built.

 

[AnnapolisAirhead]

If you still have the original owners manual it says the R100 (what you call the 100T) had the same 11/32 final drive as same year RT and RS bikes. After 1980 all US 1000cc bikes had 8.2:1 compression ratio. Plug your VIN in the chart on the bmbikes.co.uk site and see what month/year it was built.

When I plug the VIN in, it tells me it is an R100T. Go figure.

 

[lkchris]

Not sure if the specs are for US or non-US models

Those are non-US specs.

All USA R100 from '80 or '81 on were low compression.

8.2 from '80-'84

8.5 from '87-'95

 

[AnnapolisAirhead]

Those are non-US specs.

All USA R100 from '80 or '81 on were low compression.

8.2 from '80-'84

8.5 from '87-'95

Ok. I think that and dual ported heads mean unleaded is fine to run? I've been using premium--thinking it'd burn hotter and clear stuff from sitting 8+ years.