I was curious about that because Cognito moto sells the kit with sprockets for the early models to run a wider tire. The '77-'78 have no need for the sprocket conversion. I always assumed it was d/t sprockets not the shaft output.
I was curious. I am using the stock sprockets on my '78 because I am running a 160 tire on back. The stock '77-'78 sprockets allow for a tire that wide with no modifications or spacers. Unfortunately it runs the 630 chain.
If you are wanting oem style then 4to1 offers a complete wiring harness (plug and play) for about $75 but will need to be adapted for LED. If you want pure simplicity, something to clear up space by eleminating fuse box, headaches, etc. and fully ready for LED w/ modern features the moto gadget...
You need to remove 1/4" from both sides. I laid my completely stripped stock swing arm on cardboard on the floor with the very back side against a stable straight edge. I then marked where the edges of the rear arm was on the card board. I then lined up my laser (I got it for $60 to align my...
Relaced and completely rebuilt the rear wheel to go with a 160 tire. Still kept the factory diameters on both tires. Added the inner fender and finished the tail light.
Stiffened and mildly modified the frame, all bearings (including swingarm) upgraded, new cruisetech tires, forks upgraded with performance springs and front lowered 2.5" (the 77-78 bikes have longer forks than the earlier models), longer rear shocks to keep stock ride height and stretched the...