![]() |
#1 |
Join Date: Sep 2022
Location: Ohio Valley
Posts: 710
|
17/40 sprocket setup for hawk 250
Well, since it has become abundantly clear that I won't be taking the Hawk off road anymore, I am interested in getting the RPM's as low as possible for street riding. I've seen several people on Amazon switch to the 17/40 setup. I understand I will lose some oomph. But my question is, will my 128 tooth chain fit? I've seen on Amazon that the 17/40 and 128 tooth chains are often bought together, but I wanted to ask you guys before ordering. Thanks.
__________________
2022 Hawk 250 |
![]() |
![]() |
#2 |
Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,664
|
A 128 link chain will work.
__________________
2024 Linhai 300 ATV 4x4 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 |
![]() |
![]() |
#3 |
Join Date: Feb 2021
Posts: 991
|
In my opinion , a 40/17 is not going to be a very good combination for you , nor for most people. I know you changed rear tire, and it reduced your gearing a little, but a 42-43/17 is really about as high as you should go. Some people that use the 40/17 have bikes like the TBR7, which has a smaller rear wheel, but on a Hawk, with an internally stock motor, and a hefty rider, living in a hilly part of the country, it's just going to make it hard to take off, and especially hard to take off from an upward slope. I think it would be harder on the bike than the few extra rpm that you want to reduce. I see post on the Facebook groups were people are recommending " crazy" combinations like 34/17. Jerry ran sprockets that ,if I remember right were 40/17, and was one of the few that was able to benefit from them, but he had a hotter motor, is under 200lbs, and lives in Louisiana.
|
![]() |
![]() |
#4 | |
Join Date: Aug 2013
Posts: 255
|
Quote:
You should be aiming towards 1k rpm every 10 mph, or 5k rpm at 50mph. On my Xpect I run a 17/36t as ideal lowest gear. Been asking if the hawk has the same gear ratio as the Xpect, or not, and if it does, you should go with a 36-38t rather than a 40+t. |
|
![]() |
![]() |
#5 | |
Join Date: Sep 2022
Location: Ohio Valley
Posts: 710
|
Quote:
__________________
2022 Hawk 250 |
|
![]() |
![]() |
#6 |
Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,664
|
With the 40 tooth rear sprocket, you can always drop down to 16 or 15 tooth front if you find it to tall of a gearing. I use to swap the front sprocket when going from street to off road. Easy to swap back and forth.
__________________
2024 Linhai 300 ATV 4x4 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 |
![]() |
![]() |
#7 | |
Moderator
Join Date: Oct 2016
Location: Houma, La.
Posts: 11,664
|
Quote:
__________________
2024 Linhai 300 ATV 4x4 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 |
|
![]() |
![]() |
#8 |
Join Date: Jan 2018
Location: NC
Posts: 225
|
I ran a 17/40 sprocket set-up on the Hawk for about 4 years after porting and polishing the head of my CG250 engine and loved it. I could comfortably run 65-70 mph all day long on my local highways without overstressing the engine. If you're running primarily on the street and doing occasional light off roading (i.e., double track dirt or gravel roads, riding across fields, etc.), then 17/40 is excellent.
|
![]() |
![]() |
#9 |
Join Date: Oct 2023
Location: Western PA
Posts: 282
|
Did something happen?
__________________
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) |
![]() |
![]() |
#10 |
Join Date: Sep 2022
Location: Ohio Valley
Posts: 710
|
having about 1 out of 3 days when my equilibrium is up to it. I went back on the trails with my son in law a while back and nearly dropped the bike several times due to my balance being off and I am just overall weaker this year. Been to the doctors but nothing is resolved.
__________________
2022 Hawk 250 |
![]() |
![]() |
#11 | |
Join Date: Oct 2023
Location: Western PA
Posts: 282
|
![]() Quote:
__________________
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) |
|
![]() |
![]() |
#12 |
Join Date: Sep 2022
Location: Ohio Valley
Posts: 710
|
It's my fault. I've treated my body like an amusement park since I discovered alcohol and recreational drugs, and now I suffer the consequences. I have some plans to mitigate the damage, but we'll see what happens.
__________________
2022 Hawk 250 |
![]() |
|
![]() |
![]() |
|
|