So does 14 years development!cgallant wrote:My RS with porting, and custom heads was good for about 90 max.
The power delivery, chassis, suspension, frame make a huge difference in the bikes.
Hardly fair to compare your RS to an NSR circa 1990 Charles!
The 1989-1992 RS250 makes a much better comparison, although they are still quite different animals. The motors though, which I believe is the aspect in question in Phatmc28's post, are very similar so it's a valid enough question.
The main differences in the RS's favour are, in no particular order:
- porting
- lighter internal components
- electronics
- fuelling (38mm carbs vs. NSRs 32mm)
- exhaust design
There are other things to consider too, such as the fact the RS will rev higher/longer, the single-ring pistons generate less friction, and the type of fuels usually used allowing higher compression and/or different ignition timings.
As drschneider says, an RS of the similar era is much more likely to have been making 80-85hp (certainly NOT 100hp) and NSRs have been known to make up to 75ish hp. Even the first of the next generation privateer Pro-Arm RS250's were only making around 85hp.
At the end of the day though, the biggest single difference I personally reckon is the crank. The RS crank and con'rod bearings are rated to 14000rpm, with a sustained rating of 13000rpm, but the NSR is 13000/12000rpm respectively and normally makes peak hp around 11500-11750rpm. When you are at that level of tuning, 1200rpm can make a huge difference.
_________________
Andy.
NSR-WORLD.COM
Please keep all responses to Forum posts on the Forum so that others may benefit.
Please DO NOT PM me for technical advice. My time is precious, and you will probably receive a faster response on the Forum anyway.
Check us out on Facebook! Please "like" our page!