![]() |
#1 |
Join Date: Apr 2024
Posts: 5
|
![]()
Hello I am wondering what the best sprocket setup would be to get a boost in speed as first gear is really short and my top speed is 55mph. Looking to get top speed around 70-75 so I'm not pushing it riding around town where the speed limits of the major roads I take is 45-50MPH
|
![]() |
![]() |
#2 | |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,100
|
Quote:
If Yes: The best you will do with no engine mods other than jetting the stock carb properly is about 62-ish MPH, no matter what sprockets you have. With a full exhaust you then push that limit up to about 65-68mph. If you want any more than that you will be entering the realm of rapidly diminishing returns looking at big engine upgrades. Ported head and a cam at a minimum. Which will get you to, and a bit past, that 70mph barrier. On flat ground with no wind fighting you. You WILL need at least a 17 front and 45 rear sprocket to even have a chance of turning the RPM needed to hit 75 - which will happen right at 8000rpm.
__________________
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 |
|
![]() |
![]() |
#3 |
Join Date: Feb 2007
Posts: 1,357
|
Yep, you need something with more motor.
|
![]() |
![]() |
#4 |
Join Date: Mar 2020
Posts: 153
|
There's only one source for the Magic Sprocket -- and I ain't tellin'...
|
![]() |
![]() |
#5 |
Join Date: Oct 2023
Location: Western PA
Posts: 278
|
Based off the oil leak thread from the same member, appears to be a 21 Hawk DLX.
OP, I'm running a 47 rear and 17 front. On hilly country roads with knobby tires and wind from somewhere always, my max speed has been 68mph.
__________________
2022 Hawk DLX EFI * 17T Front / 47T Rear / 428 x-ring chain * Kenda K-760 front + rear * Banjo brake light switch * LED headlight + front turn signals * Custom cutting board skid plate * Debadged (I don't like to brag about the superior strength!) * Top speed, GPS verified, as equipped: 68 mph (so far) |
![]() |
![]() |
#6 |
Join Date: Feb 2021
Posts: 988
|
The only reason that I run a 46 tooth sprocket is because I already had 2 , one from my old Brozz , and one that was evidently stock with the TBR7, that I bought slightly used. I tried the 17 tooth with the 46 when the bike was basically stock, and thought about keeping it, BUT on certain long fast hills the bike ran out of steam too fast, so I switched to a 16 tooth front,and the bike did a lot better. I modded my motor, and got noticably more power, and a more fast road compatible power curve, so I put my 17 back on the front, and it was just right. I was still on the stock knobby when I put the 17 on, but have since put a Dunlop D605 , 4.60x18 on the rear, and I can tell it geared me down just a little from what it was with the knobby, which evidently had a larger diameter. I'm still very satisfied with the Hawk now, to the point of being too satisfied, because I am riding it so often, and for longer faster rides, that I bought the KPX for. LOL. I have been riding the KPX more often in the last couple of weeks. The Hawk was taching close to 8,000 at 70( true GPS verified )with the D605, it will still run 70, but is just starting to go beyond 8,000.
|
![]() |
![]() |
#7 |
Join Date: Oct 2020
Location: Central VA
Posts: 1,259
|
If you gear for 70+ you better hope there's a tornado at your back at all times in addition to always rolling downhill
__________________
2024 Zuma Storm 150 DLX 2019 Beta 430 RRS 2018 VStrom 1000 XT Former China Bikes: Tao DBX1, Brozz 250, CSC RX4, Titan DLX, Templar X |
![]() |
![]() |
#8 | |
Join Date: Aug 2013
Location: Goodyear, Arizona
Posts: 412
|
Quote:
__________________
2020 Tao TBR7 9.3:1 PnP head CRF230F exhaust 4 degree advance key 290 degree cam Nibbi PE30 and cone filter Front fork brace |
|
![]() |
![]() |
#9 |
Join Date: Feb 2021
Posts: 988
|
I know Jerry runs ,or did run similar sprocket sizes on his Hawk, but for most of us that gearing is too high for our Hawks. The popular sprocket sizes that most switched to on the TBR7 is the 42/17, which is about like a 45/17 on a Hawk, because the rear tire has a good bit more circumference.
|
![]() |
![]() |
#10 |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,100
|
I am aware, but I never like to make assumptions without qualifying them, because many people here do own multiple china bikes.
__________________
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 |
![]() |
![]() |
#11 | |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,100
|
Quote:
__________________
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 |
|
![]() |
![]() |
#12 |
Join Date: Dec 2020
Location: Dayton Pa.
Posts: 922
|
17 and 39 on the back,yep 68 mph. Thats all it will do.
|
![]() |
![]() |
#13 |
Join Date: Oct 2023
Location: Western PA
Posts: 278
|
I'm not a big guy. I'm 5'8" and hover between 150 and 155....might be why I get away with my gearing.
__________________
2022 Hawk DLX EFI * 17T Front / 47T Rear / 428 x-ring chain * Kenda K-760 front + rear * Banjo brake light switch * LED headlight + front turn signals * Custom cutting board skid plate * Debadged (I don't like to brag about the superior strength!) * Top speed, GPS verified, as equipped: 68 mph (so far) |
![]() |
![]() |
#14 |
Join Date: Apr 2017
Location: Omaha, NE
Posts: 8,100
|
It's not really the weight that gets us bigger people. It's the Aerodynamic drag. Bigger and Taller = more frontal area. More frontal area = more total resistance. Put a man like my best friend, who is 5'6 and 120lbs on a Hawk and he will probably be able to hit 70mph on a Hawk with just an exhaust and the right sprocket combination. Put myself at 6'4 260lbs on that same bike, being pretty much 30-40% dimensionally bigger on that same bike, and 68 will be the best I can do.
__________________
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 |
![]() |
![]() |
#15 | |
Join Date: Aug 2013
Location: Goodyear, Arizona
Posts: 412
|
Quote:
__________________
2020 Tao TBR7 9.3:1 PnP head CRF230F exhaust 4 degree advance key 290 degree cam Nibbi PE30 and cone filter Front fork brace |
|
![]() |
|
![]() |
![]() |
Tags |
hawk 250 mods, hawk 250 motor, hawk 250 parts, hawk 250 specs |
|
|