17/43 sprocket mod

Topbench · 05-10-2021, 05:59 PM

Hi All. How will the 17/43 sprocket mod affect the hole shot? 1st gear seems pretty tall already in the Raven 250. Does this mod change it much? Thanks.

Topbench · 05-12-2021, 01:54 PM

Ahemm... I've got a little humble pie that I'd like to share on this topic. I ASSUMED that this mod was needed and had bought the sprockets ahead of time. I took the covers off last night and found that this bike came with 17/46. I guess that might explain the taller 1st gear. Could someone share what lowering the rear sprocket to 43 would do for me as opposed to having a 46? Thanks.

XLsior · 05-12-2021, 03:17 PM

A 3 tooth rear gear change from a 46 to 43 will see a 2.75 to 2.53 gear reduction with a 17t front. If your after better top speed open road less RPM a 42-40 might give a more noticeable change.

mtiberio · 05-12-2021, 05:55 PM

what size wheels

Topbench · 05-12-2021, 06:06 PM

Quote:

Originally Posted by mtiberio

what size wheels

21 and 18

mtiberio · 05-14-2021, 06:41 AM

I run those gears and those wheels. I like it on highway. Plenty of pep off the line, but hard core off roaders might want a lower 1st.

05-10-2021, 05:59 PM	#1
Topbench Join Date: Apr 2021 Posts: 23	17/43 sprocket mod Hi All. How will the 17/43 sprocket mod affect the hole shot? 1st gear seems pretty tall already in the Raven 250. Does this mod change it much? Thanks.
	0

05-12-2021, 05:55 PM	#4
mtiberio Join Date: Jun 2016 Location: Arlington, VA Posts: 258	what size wheels __________________ 4 time WERA SuperVintage Roadracing National Champion, SCTA Land Speed Record Holder, 3rd AMA Motorcycle GP of Miami
	0

05-14-2021, 06:41 AM	#6
mtiberio Join Date: Jun 2016 Location: Arlington, VA Posts: 258	I run those gears and those wheels. I like it on highway. Plenty of pep off the line, but hard core off roaders might want a lower 1st. __________________ 4 time WERA SuperVintage Roadracing National Champion, SCTA Land Speed Record Holder, 3rd AMA Motorcycle GP of Miami
	0

05-12-2021, 01:54 PM	#2
Topbench Join Date: Apr 2021 Posts: 23	Ahemm... I've got a little humble pie that I'd like to share on this topic. I ASSUMED that this mod was needed and had bought the sprockets ahead of time. I took the covers off last night and found that this bike came with 17/46. I guess that might explain the taller 1st gear. Could someone share what lowering the rear sprocket to 43 would do for me as opposed to having a 46? Thanks.
	0

05-12-2021, 03:17 PM	#3
XLsior Join Date: Aug 2020 Location: Australia Posts: 1,280	A 3 tooth rear gear change from a 46 to 43 will see a 2.75 to 2.53 gear reduction with a 17t front. If your after better top speed open road less RPM a 42-40 might give a more noticeable change.
	0