I finished my break-in of replacement 48cc. It went lots smoother with everything else nailed down. I'm shooting for a lot more than 700 miles on this one.
I reworked everything, found the good, fixed the bad. The jackshaft mount held up good considering it took a lot of hits, bearings good, shaft good, and crankset side good. But, it still had a twist, probably from when I tossed it over a hill. Knee and calf still hurts so yeah beyond operation parameter.
The 21T sprocket only 415 width, wore out, chain wore out. Too thin too much slop.
I redid engine mounts and welded a stiffener plate to jackshaft bracket, welded up a mount spacer for engine, drilled exact fit. No more sloppy wallowed out hole, no shims. I shifted engine a bit higher on bracket, better chainline.
Added 18T 420 sprocket. Mounted it all, took clutch plate off, and carefully shimmed to get alignment exact on new. Feeling it is so much better than eyeballing it one shim can change the drag.
Made new hardware for both chain tensioners, stiffer, better position. Much less bouncing, less drag.
Rear cassette now 14-28T 6-speed.
Much better shifting, seems like more power, even 16:1 mix runs great. I may only take it to 24:1 on next tank. The way I dogged the last one, maybe I'll treat this one better.
I made a video! Audio sucks. At a couple of spots a strap was beating my helmet. Yes I thought head gasket too I even tilted my head.
I reworked everything, found the good, fixed the bad. The jackshaft mount held up good considering it took a lot of hits, bearings good, shaft good, and crankset side good. But, it still had a twist, probably from when I tossed it over a hill. Knee and calf still hurts so yeah beyond operation parameter.
The 21T sprocket only 415 width, wore out, chain wore out. Too thin too much slop.
I redid engine mounts and welded a stiffener plate to jackshaft bracket, welded up a mount spacer for engine, drilled exact fit. No more sloppy wallowed out hole, no shims. I shifted engine a bit higher on bracket, better chainline.
Added 18T 420 sprocket. Mounted it all, took clutch plate off, and carefully shimmed to get alignment exact on new. Feeling it is so much better than eyeballing it one shim can change the drag.
Made new hardware for both chain tensioners, stiffer, better position. Much less bouncing, less drag.
Rear cassette now 14-28T 6-speed.
Much better shifting, seems like more power, even 16:1 mix runs great. I may only take it to 24:1 on next tank. The way I dogged the last one, maybe I'll treat this one better.
I made a video! Audio sucks. At a couple of spots a strap was beating my helmet. Yes I thought head gasket too I even tilted my head.