'82/'83 1100e gearing

[Rob S.]

My '82 spins about 4.6/4.7k at indicated 70 mph. 40-tooth rear sprocket with 630 chain.

I'm curious to know what other 1100EZ/EDs are revving.

[rapidray]

How do you get a GS1100 motor all the way to 46,000 RPM????
Ray.

[hikermikem]

How do you get a GS1100 motor all the way to 46,000 RPM????
Ray.

Ha, I was thinking the same thing! I think it will only do it once.

[yank]

Must be the 630 chain.

[hikermikem]

My '82 spins about 46/47k at indicated 70 mph. 40-tooth rear sprocket with 630 chain.

I'm curious to know what other 1100EZ/EDs are revving.

If I remember correctly, my '81 1100 runs a little over 4K at 70mph with a 50T rear & 18T front, 530 chain.

[Rob S.]

Yes, I made a typo.

But let's see...four answers, one is serious, the other three are snide comments. On this site? How shocking! "Surprise, surprise!" as Gomer Pyle would have said.

[Griffin]

Stock sprockets are 15 teeth up front and 42 teeth in the rear. At 70mph with oem-sized tires your engine will be spinning at 4450 rpm in 5th gear.

[Griffin]

Stock sprockets are 15 teeth up front and 42 teeth in the rear. At 70mph with oem-sized tires your engine will be spinning at 4450 rpm in 5th gear.

To elaborate, if you still have a 15 tooth sprocket up front, the 40 tooth on the rear gives you 4673 rpm at 70mph.

[Rob S.]

The way my ten-speed works, smaller in the back equals less rpms for my engine (feet).

I can't see why my motorcycle would be any different.

[Griffin]

The way my ten-speed works, smaller in the back equals less rpms for my engine (feet).

I can't see why my motorcycle would be any different.

You're right, I did the math backwards. 15/40 comes out to 4238 rpm at 70mph.

How many teeth on your front sprocket?

[gs1100ez]

around 5k at 80mph
stock gearing

just changed to 530 chain
15/50
seems to be the same

[blowerbike]

15/50 huh>
what>?
thats 1/4 mile stuff unless 530 changes it that much.
you would spend you day shifting or umm revving really hard.
someone splain plez?

[Nessism]

50/15 = 3.4 = crazy high rpm for street bike

[mmattockx]

around 5k at 80mph
stock gearing

just changed to 530 chain
15/50
seems to be the same

15/50 is a huge jump from stock, 19% lower. Unless you have something wrong in your numbers there is no way that would seem to be the same. If you ran 4500rpm before you would now be running 5355rpm at the same speed.

unless 530 changes it that much.

The chain size has nothing to do with it, the drive reduction is only based on the number of teeth on each sprocket.


Mark

[Rob S.]

How many teeth on your front sprocket?

That's the big question. (I don't know.) A lot easier to count the teeth on the rear sprocket.