[Jako]

In certain circumstances a in-between length is required   so a half link is added

[Bmadd34]

interesting. Never mentioned that in school, although most of the bikes we used were belt driven.

[Jako]

This C5  must have the 19 tooth sprocket.

[no bs]

can't see her sprocket, but she has nice stems!

[Gesewa]

I've been riding with a 19 tooth sprocket for about 4 years on my 2012 C5.  I haven't had any power issues in any gear.  I'm 155lbs though and did also change out my stock exhaust for something 1/3 the weight if that matters.

[Bmadd34]

I've been riding with a 19 tooth sprocket for about 4 years on my 2012 C5.  I haven't had any power issues in any gear.  I'm 155lbs though and did also change out my stock exhaust for something 1/3 the weight if that matters.

How did your Vibrations settle in, and at what speed did it reduce (60mph now vibrates like 50mph etc.)? Did your top end capabilities change?

[Bmadd34]

My 19 tooth sprocket arrived today.  Pulled off the cover and low and behold.... 18 tooth stock. Got the new sprocket installed, buttoned her back up, and went for a test run. Let me say this; my theory was in fact correct. My rpms are down quite noticeably (actually almost forgot to shift into 5th until almost indicated 60mph (56mph). The vibrations at 60mph are at the level they were at 50ish mph, 70 is where 60ish was etc.. Top end did suffer a tiny bit topping out around 80 on flat ground, where it would snag an indicated 85 before. There are hills in the area, 15 -20ish degree or so (Some more of course), but I was able to maintain indicated 60-65 with ease. I did notice if I were under 55ish I had to down shift on a steep incline (I'm not the smallest framed guy at 6' 2'' and 230+-lbs). All in all, I approve. It should be a great help on my trip. In my opinion, going up one tooth in sprocket size is the best bang for the buck. Period. Thanks to every one for you advice, and expertise.

[9fingers]

Nice going Bmadd34! If I were going to do a lot of highway miles, I would do the same thing. Good luck and enjoy your trip.
9fingers

[hpwaco]

Who did you get your 19t sprocket from and how much was it?  Tnx. Hp

[Gesewa]

I noticed a 5mph difference in where it stars to get buzzy in 5th.  I bought my 19 tooth from Hitchcock’s.  I don’t recal the price.

[Bmadd34]

Who did you get your 19t sprocket from and how much was it?  Tnx. Hp

I got mine from Hitchcocks. http://accessories.hitchcocksmotorcycles.com/accessory-shop/Gearbox-Sprockets-EFI-English-Made/20893 It was 30 quid plus shipping. $53 US. It seems they are sold out for now. Must have been a rush on them.

[Bmadd34]

I noticed a 5mph difference in where it stars to get buzzy in 5th.  I bought my 19 tooth from Hitchcock’s.  I don’t recal the price.

What model do you have? What other mods have you done?

[johno]

Bmadd34,
glad you went for the larger drive sprocket, your initial experience seems to be the same as mine, and as I said earlier, for longer distances it is well worth fitting, for steeper long inclines, hit the bottom at 70mph and you will still be able to stay in top gear until 60mph when you can safely drop a gear and maintain speed, which as you have noticed the engine is now quite happy with.
On the other side, at 50mph fuel consumption is better as well due to the lower revs.....
I also fitted a DID 530NZ chain which provides good drive and has eliminated chain noise as well

[Bert Remington]

hpwaco -- I purchased my 19T sprocket from our sponsor along with its locking washer at about 300 miles.  Peter the cam guy suggested I hold off installation until 2,000 mile break-in (now 2,600).  I'm glad I did.

MapQuest's depiction of the fun part of my San Diego-to-Descanso run is http://mapq.st/2MlaJ4O.  I ride it as a track day in that I strive for consistency in my line, braking points, etc while keeping to the 55mph speed limit (60mph indicated).  I've been on the I8 four times for a total of 12 miles and above 70mph twice.  I8 is not a problem but its boring while being frightening.

The 18T is perfect for that 17.5 mile MapQuest run.  The RE is about torque and patience, not HP and fan-the-clutch.  The uphill and downhill runs use about the same gear change points.  One corner is 2nd gear; several are 3rd and 4th; and most are 5th.  Most drivers wave you by on double-Yellow straights.  Super fun, I'm grinning all the way.  I could go faster but I don't.  Since I'm polite and minding the speed limit, I'm not going to get a letter from my neighbors like the one just sent to the BMWOCSD from the Ramona folks.

Another thing I like about the 18T is the forgiving putt-putt-putt pulling away from a stop.  Let the clutch out just right -- the pull and sound are perfect.  Too quick due to rough road, etc -- don't worry about the engine stalling.

Anyway my 19T and washer are collecting dust.  PM me if you want to change that.

[Rattlebattle]

I’m similar in height and weight to Gesawa; I have also junked the heavy and bunged up monstrosity that is the original exhaust, as well as the downpipe and have put a resistor in the O2 sensor plug. Under these conditions and not living in the mountains a 19T sprocket on my C5 is a no brainer. The likelihood of stalling is minuscule; I’ve been riding for 50 years...As standard I found I was searching for another gear when in top gear. Also, given the very weedy power of these engines I never expected to be able to overtake and climb steep hills in top gear anyway. It rides more like a modern 125cc bike than a modern 500cc and use of the gearbox is to be expected really. It is what it is and I like that, but for seriously “pressing on” I ride something else. To me the RE would not be suitable as an only bike whatever the gearing.