I missed it not being a 7-speed with rear disc, I didn't know they made that model.
Direct drive was the way to go, just a tight fit.
one thing about the 7G kit is there a freewheel
sprocket that will fit the final drive shaft of the transmission?
or will the ones for the 4G fit the shaft on the 7G?
Yes, there are freewheel output sprockets that will fit, don't have the info in front me, but they are larger and not all that reliable.
Most of the disappointment with the 7G is the clutch bell just being on a bushing and the only freewheel in the whole system, meaning you have pedal the whole drive to the bell on the engine shaft with the engine off.
I tried everything I could think of ditch the bushing for bearings and there just isn't enough room without milling down the output shaft.
The 7G frame just has a big hole where the clutch bell/pulley on the engine shaft fit through.
The 4G and new 10G transfer cases have a bearing housing as part of the frame so a short shaft, pulley and clutch bell are part of the transfer case frame.
This requires the different model HS 142F, it has a short tapered output shaft with the clutch attached.
The new 10G's will come in 2 flavors...
One has a 100T freewheel secondary pulley on a pair of quality Japanese bearings and much better keyed output shaft so you can position the output sprocket where you want, these should be available in the States by summer.
The other version is made for me, the 10G KCK Long Shaft.
That is the going in the 7-speed Fito in the build bay now and I am pretty excited about it.
This is the new longer secondary next to an old 4G as the base remains the same and what it went in.
Note how the clutch bell is part of the transfer case frame, not a bolt in, the secondary however is a bolt in removable.
My version just has an output shaft long enough to reach the right side.
The right side sprocket pair are attached to freewheel bearing, which in turn mounts to the pedal crank axle to isolate the pedals from the sprockets.
I have a pillow block bearing coming for an adjustable right side carrier bearing and designing a new compact base to make it essentially a compact right side drive 4-stroke platform with adjustable tensioner, and a a flexible secondary mounting system to fit a variety of bike frames with a 3-point mount.
I tried this a year ago with that 4G in that first picture using shaft couplers and some spare SBP shaft, bearing and plate parts but that 4G was an 80T so not enough reduction and the couplers simply could not take the torque.
Note how the shaft made it hard to get to the oil filler.
I addressed that as well.
It took a year and a lot of design changes but I have the parts I need to make a pretty sweet little gas engine platform that should actually be more reliable than a left side direct drive, certainly easier to 'make go' with a wide back tire and or disc brakes, with the super double bonus of using the bike gears with the engine and almost no drag when pedaling.
Like I told ya, I am excited about this ;-}