what a speed boost!!!!!

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wheels6942

New Member
Oct 9, 2012
7
2
0
tampa
Ok, i bought a 32 tooth rear sprocket from Andyinchville on eBay. I forget where I found him from, somewhere from here I think. You can choose the number of teeth, from 27 to 39
Anyway, OHMIGODITSSAFASTICANTBREATHE.........its frickin incredible, I went by a radar sign today, nobody around, and I clocked 45.... felt like 95....

Next tweak, brake system!
scratg
 

wheelbender6

Well-Known Member
Sep 4, 2008
4,059
221
63
TX
I put one of Andy's disk mount sprockets on my motorbike. The ride is now much smoother; especially at my cruising speed of 25mph.
 

bigbutterbean

Active Member
Jan 31, 2011
2,417
3
38
Lebanon, PA
Ok, i bought a 32 tooth rear sprocket from Andyinchville on eBay. I forget where I found him from, somewhere from here I think. You can choose the number of teeth, from 27 to 39
Anyway, OHMIGODITSSAFASTICANTBREATHE.........its frickin incredible, I went by a radar sign today, nobody around, and I clocked 45.... felt like 95....

Next tweak, brake system!
scratg
No offense, thats a little backwards lol. Shoulda been brakes first, speed second. Dont take this the wrong way, just next time make sure you have good brakes before you go that much faster. I got a front drum brake way before I installed my high compression head.
 
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xXNightRiderXx

Active Member
Jan 12, 2017
515
229
43
Boise
Oof...sorry for the necro.. didnt read the date before I replied...

I'll second the brakes. I've got 180mm rotors with mechanically actuated hydraulic brakes on my bike, and it's barely enough for 35. I don't dare go above that rotor size with the fork I have though, I've seen stanchions come off the crown on forks not meant for 203s. Honestly, the only other thing I can do is build me some strong wheels with 12ga spokes and go tubeless.
 

Testname111

Active Member
May 20, 2021
349
191
43
Ok, i bought a 32 tooth rear sprocket from Andyinchville on eBay. I forget where I found him from, somewhere from here I think. You can choose the number of teeth, from 27 to 39
Anyway, OHMIGODITSSAFASTICANTBREATHE.........its frickin incredible, I went by a radar sign today, nobody around, and I clocked 45.... felt like 95....

Next tweak, brake system!
scratg


I have a 36 tooth with Athena big bore 47.6mm piston and I can't get over 30mph with a stock China engine or this 70cc Athena?????? What am I doing wrong, what carb are u using?
 

Arne brøske

New Member
Jul 31, 2021
2
0
1
23
Ok, i bought a 32 tooth rear sprocket from Andyinchville on eBay. I forget where I found him from, somewhere from here I think. You can choose the number of teeth, from 27 to 39
Anyway, OHMIGODITSSAFASTICANTBREATHE.........its frickin incredible, I went by a radar sign today, nobody around, and I clocked 45.... felt like 95....

Next tweak, brake system!
scratg
I am very new to the motorized bike community and I was wondering if a rear sprocket with more teeth is better with one with less can you let me know?
 

Testname111

Active Member
May 20, 2021
349
191
43
bigger tooth gears will give you more tourk ( hill climbing power) and smaller gears will give you more top speed allot less hill climbing power