thanks , that is close the calculation, so that must be it.RMac said:3900 rpm in 6th gear is ~126km/h (~78mph) indicated
thanks , that is close the calculation, so that must be it.RMac said:3900 rpm in 6th gear is ~126km/h (~78mph) indicated
+ or - . I was going of the fact that rpm is "around" 3500 at 110 km/h.motocephalic said:thanks , that is close the calculation, so that must be it.
The most accurate way to determine true speed is using a stopwatch and a set, straight line, known distance, like the mile posts on expressways. Maintain an indicated 60 mph and time your travel over exactly 1 mile. If your stopwatch says 1:05 (or 65 seconds), for example, your speedo error (at 60 mph indicated), would be: -8.33%. If your stopwatch says :58 seconds, your error would be: +3.333%ptfjjj said:Dude. That is incredible! Since you've obviously done this before, how close does true speed relate to actual real world road speed? Yeah, it kind of seems obvious to me that it does, but my pea brain usually has to hear the same thing two different ways before it sticks. ???
If it is as accurate as it seems to be, we should all be able to use this informaton to determine our individual speedometer error? (I noticed that you have to know the error in order to use the speedo healer.) If it is not too much trouble, can you post a few numbers that fall right on one or two of the big numbers on the tach? Like right at 4K or 5K?
Thanks,
Paul
Gee, I missed that by 0.434 MPH in my reply #5 in this thread. ;DJakeboy said:3Having said all that, at 4000 rpm (in 6th gear), your speed would be 79.566 mph.
You have to be careful, that kind of error could get you a speeding ticket! Ha ha!fredz43 said:Gee, I missed that by 0.434 MPH in my reply #5 in this thread. ;D
Well, I can verify that your calculations are accurate, as I checked them at 3,000, 4,000 and 5,000 RPM in 6th gear. I'm too lazy to do all those calculations, but had a good time doing the field testing. ;DJakeboy said:You have to be careful, that kind of error could get you a speeding ticket! Ha ha!
I'm one sick, long winded puppy, I know.
I need that bike!!! Now!!! Help!!!!
Thanks, that's easy enough.pqsqac said:Mellow this is directly out of the US owners manual should be the same for everyone.
Engine break-in There is never a more important period in the life of your engine than the period between 0 and 1600 km (1000 mi). For this reason, you should read the following material carefully. Since the engine is brand new, do not put an excessive load on it for the first 1600 km (1000 mi). The various parts in the engine wear and polish themselves to the correct operating clearances. During this period, prolonged full-throttle operation or any condition that might result in engine overheating must be avoided.
0–1000 km (0–600 mi)
Avoid prolonged operation above 3900
r/min. NOTICE: After 1000 km (600
mi) of operation, the engine oil and final gear oil must be changed, and the oil filter cartridge or element replaced.
1000–1600 km (600–1000 mi)
Avoid prolonged operation above 4700 r/min.
1600 km (1000 mi) and beyond The vehicle can now be operated normally.
NOTICE
_ Keep the engine speed out of the tachometer red zone.
_ If any engine trouble should occur during the engine break-in period, immediately have a Yamaha dealer check the vehicle.
I don't think I have that much patience. I am lucky if I can stop 2X in 100 miles. I will try and vary the speed though.japako said:I think there are two things, that have not been discussed, about engine break in, that are important.
The first is, never hold the same rpm for long extended periods of time.
And the second is a heat cycle. I believe the engine needs to be shut down and let cool off during the
break in. I may put 4 or 5 heat cycles in a 100 mile run.
That would take a lot of will power to do the heat cycle thing in the first 100 miles Even to stop and let it cool in first 500 miles would be tough. I might even go for a 1000 the first day.japako said:I think there are two things, that have not been discussed, about engine break in, that are important.
The first is, never hold the same rpm for long extended periods of time.
And the second is a heat cycle. I believe the engine needs to be shut down and let cool off during the
break in. I may put 4 or 5 heat cycles in a 100 mile run.
I have owned several Yamahas and I do not believe Yamaha has hard RPM limits during break in. Having read so many of their owner's manuals over the years I'm pretty sure it states "avoid prolonged operation over x rpm..." I have never read a Yam manual that says "do not exceed x rpm..."motocephalic said:Keeping it under 3900 RPM's for the first 600 miles.
Various "experts" on the net stress heat-cycling, but I've never seen an OM, factory source, or any authoritative source say it matters. Personally, I don't think it matters. I've never read a sound technical rationale why an engine would break in differently when run through many heat cycles vs. fewer. In fact, I would think it better not to subject the engine to startup wear over and over during break in.japako said:And the second is a heat cycle. I believe the engine needs to be shut down and let cool off during the
break in. I may put 4 or 5 heat cycles in a 100 mile run.
I found this information in the service manual:20valves said:I have owned several Yamahas and I do not believe Yamaha has hard RPM limits during break in. Having read so many of their owner's manuals over the years I'm pretty sure it states "avoid prolonged operation over x rpm..." I have never read a Yam manual that says "do not exceed x rpm..."
I like to ride feeder roads to the interstate near my house to break 'em in. You can vary the rpm getting on and off the highway, going through all the gears, then return to base to let it cool, repeat. You get your miles, rpm variance, brake usage and heat cycles. 8)
Thanks for the confirmation. After yesterdays ride, I have confirmed it for myself as well. The gearing is tall allowing for ample speed keeping the rpms low.gazxt1200z said:Hi, yes 3900rpm is 78mph and 4700rpm is 92mph then you start getting real buffeting from the wind so hopefully somebody will make a more angled back screen soon,gazxt1200z
Check out Greg's windscreen adjuster:gazxt1200z said:Hi, yes 3900rpm is 78mph and 4700rpm is 92mph then you start getting real buffeting from the wind so hopefully somebody will make a more angled back screen soon,gazxt1200z
I like it . I have it on my to buy list.colorider said:Check out Greg's windscreen adjuster:
http://www.motorradgarage.com.au/catalog/product_info.php?cPath=106_247&products_id=1191
I have one in my "bin of farkles", waiting for my SuperT to arrive!!motocephalic said:I like it . I have it on my to buy list.