RPMs at WOT?

C

cnodie1

New Member
How many revs does a Grubee Skyhawk GT5 put out at WOT. Im just wondering really... if i know the max RPMs I can figure out cruising revs, idling revs etc

Thanks,
Clark
 
just get a spedo, find your top speed, and work backwards, factoring in all of the gearing ratios all the way back to main drive.
 
I think 6000 is a nice number for a stock 66cc, They'll go heaps faster at the expense of parts, If you run it over 7000 too much something will break or wear fast. Unless its blueprinted, balanced and tuned then 8000+ is possible untill you rub the chrome off the bore...

The 50's can spin a little faster.

I run my 66cc between 5800 & 6200 depending on conditions or mood. I have a 35t sprocket BTW

With a 36t sprocket on a 26" high tyre 6000=31.5mph

With a 40t sprocket on a 26" high tyre 6000=28.2mph

With a 44t sprocket on a 26" high tyre 6000=25.7mph

I downloaded a spreadsheet for this stuff from some other place.
 
wildemere said:
I think 6000 is a nice number for a stock 66cc, They'll go heaps faster at the expense of parts, If you run it over 7000 too much something will break or wear fast. Unless its blueprinted, balanced and tuned then 8000+ is possible untill you rub the chrome off the bore...

The 50's can spin a little faster.

I run my 66cc between 5800 & 6200 depending on conditions or mood. I have a 35t sprocket BTW

With a 36t sprocket on a 26" high tyre 6000=31.5mph

With a 40t sprocket on a 26" high tyre 6000=28.2mph

With a 44t sprocket on a 26" high tyre 6000=25.7mph

I downloaded a spreadsheet for this stuff from some other place.
Click to expand...

I just mounted a digital tach to my motor and your numbers match up pretty close to my 41 tooth 26" tire.... Getting closer to 6300 rpm`s at 27 mph....
 
wildemere said:
I think 6000 is a nice number for a stock 66cc, They'll go heaps faster at the expense of parts, If you run it over 7000 too much something will break or wear fast. Unless its blueprinted, balanced and tuned then 8000+ is possible untill you rub the chrome off the bore...

The 50's can spin a little faster.

I run my 66cc between 5800 & 6200 depending on conditions or mood. I have a 35t sprocket BTW

With a 36t sprocket on a 26" high tyre 6000=31.5mph

With a 40t sprocket on a 26" high tyre 6000=28.2mph

With a 44t sprocket on a 26" high tyre 6000=25.7mph

I downloaded a spreadsheet for this stuff from some other place.
Click to expand...



see i must be doing something wrong because I put in my numbers into the gear ratio calc i get something like 1900 rpms
and when i put in 6000 rpms im supposed to be going 125 mph

is there a fool proof way (aka a "me" proof way) to figure out your speed without a tach... im looking into getting one soon but im interested in knowing now
 
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