WTB: 6 speed counter balanced 250 motor

commander smurf · 06-15-2023, 01:42 PM

My DF250 RTS engine runs great after 2,300 miles, but the vibration level and lack of a 6th gear mean a lot shaking to get a decent cruise speed, so I've been considering an engine swap to the newer version of the Zongshen engine with a 6th gear and a counter balancer. So far I've been unable to find this motor online, not sure why.

The RTS DF250 frame and front engine mount seem to be made to accept the bulge for the counter balancer, so a swap should be easy, can anyone help me locate an engine source or give any other inputs? Thanks, Phil

TominMO · 06-15-2023, 02:06 PM

It may be that the motor is so new that all the production is going into motorcycle builds, and they don't have just the motors for sale yet.

XLsior · 06-15-2023, 06:15 PM

a loncin RE250 is a counterbalanced 6 speed (aircooled). can be purchased direct from alibaba. the shipping will sting though.

https://www.alibaba.com/product-deta...7708aadaj6utsa

It wont get you any faster than a CG/CB250 as there just isn't enough power to push 6th so all the extra gear does is drop cruising rpm or allow you to sprocket ratio 1st down lower...

6th speed makes more sense 20hp+

The PR250 ZS172FMM is the better engine but im not sure if there is a counterbalanced 6 speed...
seems to be either a counterbalanced 5 speed or a non balanced 6speed... I can't be sure.

https://www.alibaba.com/product-deta...67294f9dOZphND

links are just for information purposes...purchase at you're own risk.

XLsior · 06-15-2023, 08:00 PM

Quote:

Originally Posted by jeffrey

Motopartssuperstore on eBay has the ZS172FMM-5 six speed counter balance engine listed for 519.95, 59.00 shipping. eBAY item#304629706929 if you can find it with this number. I can't do links sorry.

this

https://www.ebay.com/itm/30462970692...oAAOSwefxjIskZ

XLsior · 06-15-2023, 08:50 PM

Something to keep in mind with the 172 is the head is bigger/wider than the typical 166fmm and 167fml..

So depending on frame and tank clearances there might be some upper clearance issues...

commander smurf · 06-16-2023, 02:02 AM

thanks everyone for the help, feel dumb for not checking EBAY first, now have one on the way. I know the top end won't budge, but having lower Rs at right around 60 mph is a big deal on a bike like that, combined with the counter balancer it should be worth the $570-I'll let you know how it goes.

grumpyunk · 07-06-2023, 08:38 AM

Didja get it yet? Likely can recoup some of the purchase price by putting the older for sale.
tom

j5finley · 07-18-2023, 03:04 PM

keep us posted, interested to see how/if this works out

06-15-2023, 01:42 PM	#1
commander smurf Join Date: Apr 2023 Posts: 5	WTB: 6 speed counter balanced 250 motor My DF250 RTS engine runs great after 2,300 miles, but the vibration level and lack of a 6th gear mean a lot shaking to get a decent cruise speed, so I've been considering an engine swap to the newer version of the Zongshen engine with a 6th gear and a counter balancer. So far I've been unable to find this motor online, not sure why. The RTS DF250 frame and front engine mount seem to be made to accept the bulge for the counter balancer, so a swap should be easy, can anyone help me locate an engine source or give any other inputs? Thanks, Phil
	0

06-15-2023, 02:06 PM	#2
TominMO Join Date: Sep 2021 Location: De Soto, MO Posts: 1,887	It may be that the motor is so new that all the production is going into motorcycle builds, and they don't have just the motors for sale yet. __________________ 2021 Lifan Xpect--sold 2022 Lifan KPX 1972 Honda CT90--The Carrot 1969 Honda CT90--The Tomahto Cheesy is the WDK (workplace drama king). Now retired. Nope, back in the saddle. Climate: The Movie https://www.youtube.com/watch?v=A24fWmNA6lM How our government really works https://www.youtube.com/watch?v=QjadCd0VRBw Question all authority.....think for yourself
	0

07-06-2023, 08:38 AM	#7
grumpyunk Join Date: Jul 2018 Location: nw of atlanta Posts: 169	Didja get it yet? Likely can recoup some of the purchase price by putting the older for sale. tom __________________ vertical and above ground - my daily goal
	0

06-15-2023, 06:15 PM	#3
XLsior Join Date: Aug 2020 Location: Australia Posts: 1,319	a loncin RE250 is a counterbalanced 6 speed (aircooled). can be purchased direct from alibaba. the shipping will sting though. https://www.alibaba.com/product-deta...7708aadaj6utsa It wont get you any faster than a CG/CB250 as there just isn't enough power to push 6th so all the extra gear does is drop cruising rpm or allow you to sprocket ratio 1st down lower... 6th speed makes more sense 20hp+ The PR250 ZS172FMM is the better engine but im not sure if there is a counterbalanced 6 speed... seems to be either a counterbalanced 5 speed or a non balanced 6speed... I can't be sure. https://www.alibaba.com/product-deta...67294f9dOZphND links are just for information purposes...purchase at you're own risk. Last edited by XLsior; 06-15-2023 at 07:09 PM.
	1

06-15-2023, 08:50 PM	#5
XLsior Join Date: Aug 2020 Location: Australia Posts: 1,319	Something to keep in mind with the 172 is the head is bigger/wider than the typical 166fmm and 167fml.. So depending on frame and tank clearances there might be some upper clearance issues...
	0

06-16-2023, 02:02 AM	#6
commander smurf Join Date: Apr 2023 Posts: 5	thanks everyone for the help, feel dumb for not checking EBAY first, now have one on the way. I know the top end won't budge, but having lower Rs at right around 60 mph is a big deal on a bike like that, combined with the counter balancer it should be worth the $570-I'll let you know how it goes.
	1

07-18-2023, 03:04 PM	#8
j5finley Join Date: Jul 2023 Posts: 7	keep us posted, interested to see how/if this works out
	0