Hawk transmission gear ratios

kirkallen143 · 10-11-2018, 11:47 AM

Searched on here, but got a bunch of different ratios. Any one know the primary reduction, 1st thru 5th, and final for the Hawk 250 engine? Wanted to know what rpms I am running with different sprocket combinations at given speeds. Thanks.

Kirk

AresROC · 10-11-2018, 12:23 PM

Probably best to open up and count the gears... you never know.

In the meantime, here is another set of data from Bashan BSR

Factory sprockets 17 front, 46 rear (No I didn't count them, yet)

Sure would love to find out where my "Betraying" light is...

**JerryHawk250** · 10-11-2018, 03:27 PM

I entered all the Hawk information in this calculator. Just type Hawk into filter then pick the 2016 Haosen Hawk 250. http://woodsware.aciwebs.com/gears/

kirkallen143 · 10-11-2018, 04:56 PM

Jerry, you just made my day! Now folks can see what rpms they are running with different gear and rear tire setups. Might have to sticky this up to the top of the DS forum.

Really appreciate what you have done...

Kirk

**JerryHawk250** · 10-12-2018, 07:53 AM

Quote:

Originally Posted by kirkallen143

Jerry, you just made my day! Now folks can see what rpms they are running with different gear and rear tire setups. Might have to sticky this up to the top of the DS forum.

Really appreciate what you have done...

Kirk

Glad to help.
I had Megadan put in his Sticky in the DS section.

kirkallen143 · 10-12-2018, 02:48 PM

Great! Yeah now it will be pretty neat to know what the engine sounds/feels like at certain rpms while riding.

Kirk

Noobie101 · 11-22-2019, 10:43 AM

I put in the gearing i would like to run..
Could anyone chime in on this setup?.
Tbh i have a 20-25 mile comute to work and
would like to stay in my 6k-7k rpm range..
I do plan on doen the better carb and pod filter
and remove the oem air box to accomidate
Better storage space

**JerryHawk250** · 11-22-2019, 10:51 AM

What speeds will you be looking at?

Noobie101 · 11-22-2019, 10:53 AM

Hwy speed is 70 posted and everyone
Stays around 75ish if not a little more

**JerryHawk250** · 11-22-2019, 11:05 AM

Quote:

Originally Posted by Noobie101

Hwy speed is 70 posted and everyone
Stays around 75ish if not a little more

16/39 should be good. I'm running a 17/40 and can hit 75 with ease but I also ported and decked the head. On stock engine with a few mods 70 mph is doable but will be almost wide open throttle.

Noobie101 · 11-22-2019, 11:35 AM

I wouldnt have the funds or the know how to do the pnp but i do plan on getting the hawk head so idk maybe

Noobie101 · 11-22-2019, 11:36 AM

There was another head that was interchangeable but ibcant find it atm plus at wotk its hard to look for long

Noobie101 · 11-22-2019, 12:05 PM

Do you think there would be much issuses getting it to 80 if i wanted being im doen almost every mod on here exept the pnp

**JerryHawk250** · 11-22-2019, 12:25 PM

I've only hit 80mph (GPS) once and was enough for me. Never tried a top speed since. These bikes aren't designed for that kind of speed and the CG engine aren't designed for high rpms. I found anything over 70 mph and my bike starts to get squirrely because I'm running stock nobbies on it. Maybe with street tires it would feel more stable. If you're looking for something to 75-80 then something that has 25hp or more. Even something like the KPR200 can top out about 80mph.

OneLeggedRider · 11-22-2019, 12:52 PM

A 2.6 ratio is the sweet spot for these bikes and you'll never see more than 70mph unless you pnp the head and put a bigger carb on it. If you weigh less than 150lbs 2.5 will be your sweet spot. Just divide the number of teeth on the rear sprocket by the number of teeth on the front sprocket.

10-11-2018, 11:47 AM	#1
kirkallen143 Join Date: May 2015 Posts: 84	Hawk transmission gear ratios Searched on here, but got a bunch of different ratios. Any one know the primary reduction, 1st thru 5th, and final for the Hawk 250 engine? Wanted to know what rpms I am running with different sprocket combinations at given speeds. Thanks. Kirk
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10-11-2018, 03:27 PM	#3
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	I entered all the Hawk information in this calculator. Just type Hawk into filter then pick the 2016 Haosen Hawk 250. http://woodsware.aciwebs.com/gears/ __________________ 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 Last edited by JerryHawk250; 11-22-2019 at 11:10 AM.
	1

11-22-2019, 10:51 AM	#8
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	What speeds will you be looking at? __________________ 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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11-22-2019, 12:25 PM	#14
JerryHawk250 Moderator Join Date: Oct 2016 Location: Houma, La. Posts: 11,574	I've only hit 80mph (GPS) once and was enough for me. Never tried a top speed since. These bikes aren't designed for that kind of speed and the CG engine aren't designed for high rpms. I found anything over 70 mph and my bike starts to get squirrely because I'm running stock nobbies on it. Maybe with street tires it would feel more stable. If you're looking for something to 75-80 then something that has 25hp or more. Even something like the KPR200 can top out about 80mph. __________________ 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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11-22-2019, 12:52 PM	#15
OneLeggedRider Join Date: Nov 2018 Location: Stockport, Oh. Posts: 1,442	A 2.6 ratio is the sweet spot for these bikes and you'll never see more than 70mph unless you pnp the head and put a bigger carb on it. If you weigh less than 150lbs 2.5 will be your sweet spot. Just divide the number of teeth on the rear sprocket by the number of teeth on the front sprocket. __________________ ~ Don't poke the bear ~ M.M.I. Dean's List graduate class of '95 and Specialty welder 2020 Ice Bear Terifecta 150cc Trike 2011 Honda Foreman 500ES 4x4 2001 Polaris Scrambler 400
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10-11-2018, 04:56 PM	#4
kirkallen143 Join Date: May 2015 Posts: 84	Jerry, you just made my day! Now folks can see what rpms they are running with different gear and rear tire setups. Might have to sticky this up to the top of the DS forum. Really appreciate what you have done... Kirk
	1

10-12-2018, 02:48 PM	#6
kirkallen143 Join Date: May 2015 Posts: 84	Great! Yeah now it will be pretty neat to know what the engine sounds/feels like at certain rpms while riding. Kirk
	0

11-22-2019, 10:53 AM	#9
Noobie101 Join Date: Nov 2019 Location: Oklahoma Posts: 14	Hwy speed is 70 posted and everyone Stays around 75ish if not a little more
	0

11-22-2019, 11:35 AM	#11
Noobie101 Join Date: Nov 2019 Location: Oklahoma Posts: 14	I wouldnt have the funds or the know how to do the pnp but i do plan on getting the hawk head so idk maybe
	0

11-22-2019, 11:36 AM	#12
Noobie101 Join Date: Nov 2019 Location: Oklahoma Posts: 14	There was another head that was interchangeable but ibcant find it atm plus at wotk its hard to look for long
	0

11-22-2019, 12:05 PM	#13
Noobie101 Join Date: Nov 2019 Location: Oklahoma Posts: 14	Do you think there would be much issuses getting it to 80 if i wanted being im doen almost every mod on here exept the pnp
	0