05-20-2020, 08:37 AM
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#421 | |
Join Date: Feb 2007
Posts: 1,351
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05-20-2020, 08:48 AM
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#422 | |
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Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,561
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Quote:
 https://www.venommotorsportsusa.com/...16024167907430
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2023 Lifan Lycan 250 Chopper 2023 Venom Evader 2022 Lifan KPX250 2020 Kawasaki Vulcan S 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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05-20-2020, 10:05 AM
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#423 |
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Join Date: Mar 2020
Location: GA
Posts: 82
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Well I was planning on getting another cb250d-g engine for 300 which isn't bad at all. I'm trying to find as much spare parts as possible just in case. I am trying to study and learn how to add extra gearing in a motorcycle transmission. Yea doesn't look easy but the clutch changeing deal looks easy and my dad says it's very easy. I'm getting extra clutch kit for down the road. No need to change way any time soon. Currently trying to find drum breaks for my DF250RTG, they are worn out faster than I needed them to. Idk how because I try to use as much engine breaking as possible with some breaking to help save some breaks.
Anyways the 6th gear set, they say it's for the Chinese cb250, they have a 5 speed set as well with the same exact size fitting with one less gear. I kinda want one more gear for only highway use. To be honest I'm actually happy with the bike I have currently. I just feel the df deserves a 6th gear because my bike runs out 5 pretty easily... which still surprises me for a 223... I was actually expecting it to have a difficult time reaching 50mph but nope.... handes it pretty well. I also discovered the bike managed to handed pouring ass rain without any issue so far..... very very happy with my little puts cycle lol. It almost reminds me a little of the mutt motorcycles lol |
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05-20-2020, 10:47 AM
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#425 | |
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Join Date: Feb 2007
Posts: 1,351
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If you want to change the DF's gearing for more top speed then get a rear sprocket with less teeth, much easier than messing with the transmission. |
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05-20-2020, 10:47 AM
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#426 |
Join Date: May 2006
Location: Yuma, Arizona
Posts: 9,035
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There is a thread in the 'dual-sport/enduro' section of a member who installed a Loncin NE250 engine in his Hawk which he ordered from Ebay or Amazon. The NE250 has a 6-speed transmission. The recently released Kayo T4 dual-sport comes stock with this same engine (I am guessing, but it is the only 6-speed CB/CG style engine out there available in the US) www.kayomoto.com/dirt-bike/t/t4-enduro/
If you have the $700 to play with, it might be an interesting project for you to install into your bike. However, you should be able to get close to the effect of an extra gear by playing with your sprockets. 17 front and 39 rear might be as high gearing as you can get, although that is taking into consideration a dual-sport's 21/18" wheel setup, so perhaps with your 17/17" wheels, there is a better sprocket combination setup for your bike that someone could chime in on.
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"They say that life's a carousel, spinning fast you got to ride it well..." TGB Delivery Scooter 150 TMEC 200 Enduro--carcass is sadly rotting in the backyard |
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05-21-2020, 04:44 AM
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#429 |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,020
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Just to toss in some reality to the 6 speed gear set conversation. It's not as easy as you think. Outside of the gear sets you will also need the right shift selector pawl/fork selector drum, shift forks, and other small parts. You will need to know your clutch shaft diameter and spline count, main and counter shaft lengths, bearing dimensions, and countershaft length for the sprocket side.
Believe me, I did a lot of reading and researching on this subject and I still couldn't come up with good answers. The only way to know for sure what you will need would be to tear down the motor. Culcune stated the best/easiest way to get that 6th gear and that is the RE250 engine, which also has a gear driven counter balancer. The front lower and upper mount positions are slightly different from a non balanced motor, so some changes will be required there. Currently the price on the motor in question is through the roof at 1800 bucks, as are all of the engines from China right now. I can only assume due to shipping issues as all other goods now have high shipping costs as well. So, a cheaper solution it is not at this point. I agree with Barnone though, the 6th gear isn't entirely needed. It appeals to us dual sport guys gecause it gives us the ability to run bigger sprockets out back for better torque off road in the low gears while still being able to have a good highway gear. For a road bike, you can get away with a smaller rear sprocket much more easily.
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Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124 |
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05-21-2020, 01:10 PM
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#430 | |
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Join Date: May 2020
Posts: 17
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05-21-2020, 08:13 PM
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#431 |
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Join Date: Jun 2018
Location: Florida
Posts: 759
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I'm currently waiting ( and waiting, and waiting ) on some parts from China ,the cost went up a small amount, the Shipping cost went up ,but what REALLY went crazy was the actual Shipping time frame.It was already slow at up to a month before COVID19, but as of right now I am being told 8 - 10 weeks ,and it isn't just China, the parts from Thailand also seem to have been hit by this doubling ( or more) of shipping time.
It's only May 21 right now and i'm already seriously concerned that i wont get my build finished by Sept when ( hopefully ) the Fall variant of our local Florida Thunder Beach Motorcycle Rally will be held., due to the crazy shipping times.
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05-22-2020, 04:54 PM
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#433 |
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Join Date: Feb 2007
Posts: 1,351
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Pulled the rear wheel off and did some measuring and counting. I count 38 teeth on the rear sprocket. If I remember right the front is 17 and a larger one cannot be installed.
EDIT: I just found an old post of mine where I found the chain is a 428 so the JTR279 will not work. 38/17 is 2.23 stock 35/17 is 2.06 34/17 is 2.00 How high do you want to go? Last edited by Barnone; 05-26-2020 at 06:47 PM. Reason: Correct post. |
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05-22-2020, 09:27 PM
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#434 | |
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Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,020
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If I had to guess by looking at that rear sprockets teeth, and the fact that the front is probably a 17 tooth sprocket, the stock chain is a 428. Easy way to know what chain it is would be to measure the distance between the center of the pins. 428 will be 1/2" and a 520 will be 5/8" I think the best thing to do would be to determine what both sprockets are for sure (verify the front tooth count) and then go from there. If it is indeed a 17 front 38 rear, it definitely doesn't need to to go any higher. In truth, if it were me, I would go up 2 teeth out back to a 17 front 40 rear, or down one up front to a 16 with the 38 rear.
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Hawk Information and Resource guide: http://www.chinariders.net/showthread.php?t=20331 2018 Hawk 250 - Full Mod list here. http://www.chinariders.net/showpost....62&postcount=1 2024 Royal Enfield Shotgun 650 https://chinariders.net/showthread.php?t=34124 |
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05-22-2020, 10:10 PM
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#435 |
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Join Date: Feb 2007
Posts: 1,351
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I looked back and found my post back in 2019 where I said
"My DF already has a 17 tooth front sprocket. It is stamped 428-17T YOXI." So I answered my question. It is a 428 chain. So I need to go look for a 428 rear sprocket. Last edited by Barnone; 05-22-2020 at 10:44 PM. |
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