Diesel motorcycles. Me want, me shall have. - Page 7 - Fuel Economy, Hypermiling, EcoModding News and Forum

Christ · 04-09-2011, 11:10 AM

It was a4 speed, and I don't have it any more, but I'll check if I can find them.

Christ · 04-09-2011, 11:19 AM

Gear Ratios: Primary reduction 3.833:1, First 2.769:1, Second 1.722:1, Third 1.272:1, Fourth 1:1, Final reduction 15-35 2.333:1

That seems right.

dcb · 04-09-2011, 11:33 AM

what is the radius of the rear wheel, from the centerline of the axle to the ground?

Also 2.769 (2.769/1) is better than 2.44 (for a flat torque curve like a diesel or an electric)

Christ · 04-09-2011, 11:39 AM

Its a 3.5/16 tire oe.

I thought the longer gears should be better?

Also, I'll probably have to replace those tires soon... Good 16" tire recommendations?

I could get some touring pedal bike tires from wally world... Lol.

dcb · 04-09-2011, 12:57 PM

what is the outside circumference of a 3.5/16 tire?

I think a wider spread ratio from 1st to top gear is best for fairly flat torque curve engines like your clonemar (or an electric motor).

Christ · 04-09-2011, 11:16 PM

I'll measure when I get a chance tomorrow.

Christ · 04-10-2011, 08:47 PM

3.50x16 falls between 100 and 110/90-16. Center to edge was about 11.4 inches.

SwamiSalami · 04-10-2011, 08:56 PM

I think that Jesus would've driven a diesel motorcycle.

dcb · 04-10-2011, 09:08 PM

lol, actually the "i" is short, as in Kristy McNichol, I think

ok, 11.5 inch radius for the rear wheel, about 877 revolutions per mile. Good to know.

Christ · 04-10-2011, 09:15 PM

Yes, it's Christ, like Crystal, but without the "ull" sound.

So I measured that twinstar frame up a bit today... The motor won't fit with a transmission behind it, unless it's a 90°turn, so the motor/trans is longitudinal, and the output still transverse to the frame.

Strangely enough, I have a drive converter that does exactly that. Gonna have to measure more.