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#1 |
Join Date: Oct 2020
Posts: 6
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Lowest rear sprocket tooth count for Bashan Storm?
Hi All
So several months ago I upgraded my rear sprocket to 42t and I did get a higher top speed but recently I upgraded to a new carb and I lost that top speed. My question is what’s the lowest tooth count I can run in the rear sprocket without running into any problems? P.S. I’m already running 17t in the front Thanks |
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#2 |
Join Date: May 2019
Location: Illinois
Posts: 864
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I ran a 17f 40r and I loved it on my Brozz which has the same engine as the Storm. I tried a 39 and it was too tall for the engine. What carb did you upgrade to?
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2022 Venom KPR 200 Red- the fastest color 16t and 46t sprockets, NGK Iridium CPR8EAIX-9, aftermarket full exhaust system. Top speed 81GPS 2023 Venom SS3 KP mini 150– Nibbi carb, Nibbi air filter, aftermarket muffler, decat 2022 Venom Ghost chopper 250 1997 Honda GL1500 Goldwing 1978 Kawasaki KL250 https://youtube.com/@herbiesgarage681 |
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#3 | |
Join Date: Oct 2020
Posts: 6
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Quote:
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#4 |
Join Date: May 2019
Location: Illinois
Posts: 864
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These little engines are good and reliable but not powerhouses by any means. It should be able to hold 55 to 60mph without too much trouble in stock form. If you are wanting more than that then you may have to do a little more to help with the power like shaving the head down and port and polish, especially the exhaust port. And a less restrictive exhaust pipe also
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2022 Venom KPR 200 Red- the fastest color 16t and 46t sprockets, NGK Iridium CPR8EAIX-9, aftermarket full exhaust system. Top speed 81GPS 2023 Venom SS3 KP mini 150– Nibbi carb, Nibbi air filter, aftermarket muffler, decat 2022 Venom Ghost chopper 250 1997 Honda GL1500 Goldwing 1978 Kawasaki KL250 https://youtube.com/@herbiesgarage681 |
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#5 |
Join Date: Oct 2020
Location: Flower Mound Texas
Posts: 904
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Not trying to sound too sarcastic here, but how is changing to a carburetor that made your bike slower, an "upgrade"?
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2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene" |
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#6 |
Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,651
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I was thinking the same thing. Spend a little more time in fine tuning the carb. A perfectly tuned carb can make a world of difference.
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2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S (Sold) 2004 Honda ST 1300 2016 Black Hawk 250 (sold) Keihin PE30 carb,125 main,38 slow.Pod filter,ported & decked head 10:1 CR,Direct Ignition Coil,15/40Sprockets,NGK DPR8EIX-9,De-Cat,Dual Oil Cooler,Digital Cluster 2016 Cazador180 XL 2014 Coolster150 JerryHawk250.com My YouTube Channel |
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#7 |
Join Date: Dec 2018
Location: PNW
Posts: 982
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You can second and third that. A PZ30 is capable of getting all the power out of that motor in stock form and with most modifications.
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#8 |
Join Date: Oct 2020
Posts: 6
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I lost top speed and gained acceleration, the bike now feels like it’s running a higher rear tooth sprocket count. I spend 3 days tweaking the air mixture and finally got it to where it should be and the bike is much quicker than it was stock. I’m just trying to get back to the top speed I had before the carb work.
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#9 |
Join Date: Oct 2020
Location: Flower Mound Texas
Posts: 904
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Sometimes they'll accelerate a little better rich as it masks the lean spot that a slide carb without an accelerator pump has, but then they wont make as much power after the air velocity through the carb picks up and the main circuit is able to meter fuel properly.
So what I'm suggesting is going down some on your main jet and live with the compromise, or... spend $40.00 on a pz30b (pumper carb) kit, and use the proper main jet for maximum power, and tune the accelerator for maximum throttle response/acceleration. Then you can get your top speed back without changing the sprockets.
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2021 Tao Tbr7 - "Lucille" Mods so far- Brozz swingarm, 21" front rim (Bridgestone Tw302 rear/Dunlop D606 front tires), Digital gauge cluster, pz30b pumper carb, after market hand guards, aftermarket brake and clutch levers, round fold away mirrors, Fly handlebars shortened slightly, 13t front sprocket 2009 Q-link Legacy 250 1982 Suzuki GS1100ES - "Jolene" |
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#10 |
Join Date: Feb 2021
Posts: 987
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I am in the same boat as the others about the carb . If you cant get your new carb to do as well as the old carb then it would pay to use the old carb.
Last edited by Bill Hilly; 06-02-2021 at 01:22 PM. Reason: Mistake |
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#11 |
Join Date: Apr 2018
Posts: 819
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17-44/43T seems to be the best all around gears for 65 mph highway riding, anything higher and 5th can’t maintain itself up the long inclines. Not that the 44T is anything to brag about in that zone but it’s the difference of only getting dropped to 50 mph vs. 35 mph. I constantly wish for a 44.5T .
39T and 42T will get you T-boned in city traffic when turning left in to Chic fil A across 2 lanes of oncoming is already YOLO .
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Bashan Storm: Ebay steel exhaust wrapped, folding shift lever, seat mod, vm26 carb, air pod, dual led scrambler headlamps, windshield mod, led brake/tail light, secondary led brake light (swingarm), Ebay 295mm rear shock, back up CDI (racing unknown), oil cooler, digital gauge cluster, |
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Tags |
bashan storm, sprocket, top speed |
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