1. 30T & 32T are less expensive than 33T. Need to figure out the pitch?
http://www.globalindustrial.com/
~Dia 4.14" Tooth Width 0.168" Length 0.875"
$12.25 - Tritan Sprocket [25BS32X] 1/4" Pitch, 5/8" Bore, 32 Teeth
$16.25 - Tritan Sprocket [35BS33HX] 3/8" Pitch, 5/8" Bore, 33 Teeth
$11.25 - Tritan Sprocket [25BS30HX] 1/4" Pitch, 5/8" Bore, 30 Teeth
$13.50 - Tritan Sprocket [35BS30HX] 3/8" Pitch, 5/8" Bore, 30 Teeth
#35 chain is 3/8" pitch, or 0.375". Your clutch will also be #35. You will want at least 3:1 reduction from your transmission (ie: 11T -> 33T). 4:1 is better, really.
2. Use a chainring adapter and the extra 30t from above??
$23.95 - Chainring Adapter [SBP-CRA001]
http://www.sickbikeparts.com/catalog/product_info.php?cPath=21&products_id=158
$6.95 - Chainring - Freewheel - 30 Tooth [SBP-CR030] (HAVE THIS - NOT 33t)
http://www.sickbikeparts.com/catalog/product_info.php?cPath=21&products_id=66
Not sure what you're asking here. Keep in mind that SBP's sprockets are for bicycle chain, 1/2" pitch, 1/8" or 3/32" width chains.
- Thought: If I replace the 22t with a 33t, should I consider putting that 22t where the 17t is? Would it help? Could I avoid switching the hub gear by doing that?
The 17T will be a 1/2" pitch sprocket. The 22T will be #35. You can only make the 22T work in the 17's place if your transmission output is also #35.
If you decide you want even more engine-to-crank reduction, we will need to rethink your pedal-side gears again to lower hub torque and increase speed.
If you replace the 17T with the 22T, you will be increasing reduction, making taller pedal gears necessary. You may need a 44T inner crank to compensate.
Regardless, you'll want to drop your hub gear to a 15T. You're going to making quite a bit of torque with engine and legs combined, it's easy to overload the hub.
I have 69.09:1 EtoC reduction on my bike and run 44T -> 15T. Your engine with governor has effectively half the revs of mine, so around 40:1 reduction may be optimal.
40:1 EtoC = 25 pedal rpm per 1000 engine. The average person pedals between 40 and 80 rpm. With a 44-15 pedal gear and 3-speed IGH you would have:
1st: 18.18:1, (8.3 @ 2000, 15.4 @ 3600)
2nd: 13.64:1, (11.4 @ 2000, 20.5 @ 3600)
3rd: 10.25:1, (15.2 @ 2000, 27.4 @ 3600)
38MPH @ 5000 no governor
Slightly lower gearing, but now with a considerable torque advantage. Your bike would be a monster with engine + legs. Mine does 0-30MPH in 4 seconds, yours may too!
Which is why you'll have to test fit things so you know what size gear you're limited to. I switched my 17T to an 18T, I can't fit any larger, for example.
Going to need a different transmission option...
The GTC plate looks good. You're gonna need to customize the input/output gears on transmission anyway to achieve the reduction you want.
Don't let AGK get ya down. They can be problematic to deal with. If they are a problem, do business elsewhere