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I am running a 14/45 on my bike and i really like it. I think if I could find a 44 I would try that. The lower gearing works better for me out here in the desert where I do most of my riding. Not in a big hurry to get any where and I can still do 50MPH.I don't see why it wouldn't work just fine. I chose the 15/45 because my old trail 90's came that way stock, I knew it was pretty good gearing.
I have heard of sprocket changes causing he ABS to show a fault, but I haven't experienced that. You might try 14/45 and have a happy medium?
UPDATE: Sprocket Changes. OEM sprockets are 14T/39T. The updated is 14T/41T.
WHY: One of the first mods I did to LRD was to switch out to a 13T front sprocket from the stock 14T. I did this because I weigh 210 pounds, AND I use the LRD for Adventure riding...which means I carry a lot of luggage, often a lotta miles. I really like the 13T sprocket. It made the throttle response much better from the standing stop, and made hills much more doable with the weight Im asking the bike to carry. The problem is the 13T turns OFF the ABS. IF all I was doing was dirt, thats not a problem. However, I do looong slab with lotsa weight and I likes the ABS.
What: Today I switched out the OEM 39T rear sprocket for a 41T aftermarket Rear sprocket. Spydie provided the link see below. I switched BACK from the aftermarket 13T Sunstar front sprocket to the OEM 14T front sprocket. I added a single chain link to allow for the increase in circumference of the 'chain loop' created by going up 2 teeth. The chain adjustment is excellent allowing the rear axle to sit at the stock location.
Results: I took LRD for a longish test ride. Maybe 3 miles. The bike operates excellent. The 13T front equates to a -7.3%(let me know if im wrong) gearing ratio compared to stock. The new ratio is -5%. So, no I don't get the increase in ration the 13T gave me, however, I keep my ABS. The ABS light did NOT come on a single time. The starting stop feels just as good, and without luggage, the hills seem just as good.
I do have a 1500+ miles adventure ride in May and will be able to do a full review of this gearing set up.
Here is the link to the sprocket I used. It fits perfect. No issues I could see. It bolts right up using the OEM nuts.
(https://www.ebay.com/itm/Dirt-Bike-Pit-Bike-Rear-Sprocket-ACb-41-Teeth-for-428-Chain-in-Black-Color/151150047877?ssPageName=STRK:MEBIDX:IT&_trksid=p2060353.m2749.l2649).
Don’t compare C125 and CT125 rear sprocket sizes. The CT has a different primary gear ratio.After 1700 miles I'm wanting a calmer motor at top speed and less buzz rather than a few mph difference on hills by going with lower gearing. I use this bike to cover ground, and even though I try to stick to dirt, long stretches of pavement are unavoidable.
I've accepted the power limitations. But the Super Cub will run down the road faster and calmer at 14/36. Surely it is possible..or will be once the aftermarket picks up.. to get more hwy comfort out of this bike right?
I have tried. Cannot find any in stock.Try searching "JT Sprockets JTF273.13", they're on eBay and other sites